ETC YSS915-M

YSS915
Karaoke Processor 2 for Video disc player
(KP2V2)
INTRODUCTION
YSS915 (KP2V2) is an LSI for processing Karaoke voice signals.
This LSI has an A/D converter (1 channel) for the microphone echo, and a memory for the microphone echo and
key control. These features allow achieving the functions needed for the Karaoke system by using only one LSI
chip. As for the microphone echoes, many other types of echoes are available in addition to ordinary ones so that
YSS915 is applicable to various uses.
In addition to these Karaoke programs, YSS915 is able to provide the Movie & Music programs, with which the
surround effect is applied to the movie and music sources for giving the users more enjoyment.
YSS915 is pin compatible with and register compatible with YSS903 (KP2V).
FEATURES
[ Fund
undamental Func
unctions ]
1), Karaoke program
· Key Control (Control by 50 cents in +/- 600 cent range, +/- one octave, etc.)
· Voice Cancel
·
·
·
·
Microphone Echo
Normal microphone echo (174 msec or less (fs = 44.1 kHz))
Stereo-Echo/ Reverb-Echo
Microphone Key Control (+/- 10 cents, +/- 20 cents, +/- 400 cents, +/- 700 cents and +/- 1 octave)
Microphone "YMERSION™"
Tone Control
· Bass, Mid-tone, Treble (0 to +/- 10 dB at 2 dB steps)
Surround
· "YMERSION™" (Yamaha's original wide surround technology)
2), Movie and music program
Surround
· Initial reflection sound synthesizing system
· Yamaha "YMERSION™"
Tone Control
· Bass, Mid-tone, Treble (0 to +/- 10 dB at 2 dB steps)
·
·
·
·
·
[ I/O Interface ]
Digital signal inputs
Digital signal outputs
Analog signal input
Microprocessor interface
Through mode
: 2 channels (16/18/20/24 bits)
: 2 channels (16/18/20/24 bits)
: 1 channel ( for the microphone )
: Serial four line system
: Digital input is outputted without any processing
(Correspond with fs = 96 kHz 24 bit DVD format)
[ Oth e rs ]
· Pin/register upper compatible with YSS903 (KP2V)
: 32, 37.8, 44.1, 48 kHz or correspond with 96 kHz through mode.
· Sampling frequency
: 28 pin SOP ( YSS915-M )
· Package
YAMAHA CORPORATION
YSS915
CATALOGUE No:LSI-4SS915A0
1999.03
YSS915
Difference between YSS903 and YSS905
1. No built-in DAC.
(Refer to the process flow chart in “OPERATIONS”.)
2. Connectable directly with MSB justified data output ADC.
(Refer to “Format 4” of “4. Digital audio interface” in “ FUNCTIONS”.)
3. Microphone interface terminals CDI and CDO can be connected on the board.
This feature allows to reduce the number of ports by one.
(Refer to “5. Microcomputer interface” in “ FUNCTIONS”.)
4. Input fader has been added for the microphone echo.
This feature allows to apply fade-in/fade-out control to the microphone echo through designation with
one bit from the microcomputer.
(Refer to “1. Karaoke program” in “ OPERATIONS”, and “3) VCR ($02)” of “1. Functions” in
“REGISTERS”.)
5. Zero level detection function has been added for digital audio output.
YSS915 outputs “0” at the pin “ZERO” when an audio input has been zero for a certain period.
This signal can be used to improve S/N ratio by muting the output of external DAC.
(Refer to “6. Others” in “ FUNCTIONS”.)
6. An output port PO has been added for controlling peripheral devices.
The port “PO” can be used, as an example, to control the gain of audio output amplifier through this
LSI from the microcomputer.
(Refer to “6. Others” in “ FUNCTIONS”.)
7. A mode with extended band width for microphone echo has been newly added.
Two types of cut-off frequency have been added for the low pass filter.
(Refer to “7) RVR ($06)” and “11) MDR ($1C)” of “1. Functions” in “REGISTERS”.)
8. Internal DSP has been given the operation accuracy of 20 bits.
2
YSS915
PIN CONFIGURATION
DI
1
28
SDSY
BCI
2
27
CDO
26
CDI
25
/SCK
DO
3
L/R
4
DVDD1
5
24
/CS
BCO
6
23
P0
22
XISEL/ZERO
21
DVSS2
20
DEPI
DVSS1
AVDD
PLLC
AVSS
7
8
9
10
19
DVDD2
ADC1
11
18
/IC
ADC2
12
17
XI
VREF
13
16
AOR
MICIN
14
15
AOL
< 28pin SOP Top View >
3
YSS915
PIN FUNCTION
No.
Name
I/O(See Note1)
1
DI
I+
Digital audio input
Serial data
2
BCI
I+
Digital audio input
Bit clock
3
DO
O+
Digital audio output
Serial data
4
L/R
O
Digital audio output
Word clock
5
DVDD1
-
Power supply, +5 V (for digital system)
6
BCO
O
Digital audio output
7
DVSS1
-
Ground (for digital system)
8
AVDD
-A
Power supply, +5 V (for analog system)
9
PLLC
-A
Connecting resistor and capacitor for PLL
10
AVSS
-A
Ground (for analog system)
11
ADC1
-A
Connecting capacitor for ADC
12
ADC2
-A
Connecting capacitor for ADC
13
VREF
OA
Referential voltage output
14
MICIN
IA
Analog input, analog voice signal for microphone channel
15
AOL
OA
Outputs analog voice signal for L channel
16
AOR
OA
Outputs analog voice signal for R channel
17
XI
I
External clock input
18
/IC
I
Initial clear (Low active)
19
DVDD2
-
Power supply, +5 V (for digital system)
20
DEPI
I
De-emphasis control (H : On, L : Off)
21
DVSS2
-
Ground (for digital system)
22
XISEL/ZERO
I+/O
Switches master clock rate/ZERO output
23
P0
I+/O
Test input terminal /P0 output
24
/CS
I
Microcomputer interface input
Chip select
25
/SCK
I
Microcomputer interface input
Serial clock
26
CDI
I
Microcomputer interface input
Serial data
27
CDO
O+
Microcomputer interface output Serial data
28
SDSY
I+
Digital audio input
Notes ;
+ : Pull up,
A : Analog terminal
4
Function
Bit clock
Word clock
YSS915
BLOCK DIAGRAM
This LSI has two input channels (L and R) and two output channels (L and R) for digital audio interface. It also has a
one bit Delta-Sigma type AD converter 1 channel (microphone) that performs Delta-Sigma modulation at its analog
block, and decimation/interpolation of 128 times at its DSP.
Karaoke audio signal is processed by DSP for processing Karaoke audio signal and RAM for delay.
For the details of Karaoke audio signal processing, please refer to "OPERATIONS".
The parameters of this LSI are set through CPU interface. For the details of the parameters, please refer to
"REGISTERS".
DEPI
KP2V2
/CS
CDI
/SCK
CDO
P0
CPU interface
SDSY,DI,BCI
Digital I/O
Interface
DO,L/R,BCO
RAM
for delay
ZERO
DSP
Program ROM
MICIN
Analog block
AOL
/IC
Clock
generator
XISEL
AOR
VREF
ADC1
ADC2
XI
PLLC
MODES
Name of mode
Code
KP2
standard mode
N
Description
The functions of KP2 (YSS216B) can be used. The registers are compatible, except that
the coefficient registers (addresses $27 and $30 to $33) of KP2 that controls the analog
audio input and analog microphone echo output cannot be used because YSS903 does
not have these ports.
KP2V
extended mode
E
Every function of this device can be used.
5
YSS915
FUNCTIONS
1. Clock signal
XI, XISEL, PLLC
Operation of this LSI requires input of clock with frequency of 384 fs (fs : sampling frequency) or 256 fs to the XI
terminal.
Keep the XISEL terminal open when using with the 384 fs clock.(XISEL pin is pulled up internally.)
Pull down XISEL terminal to the digital ground through 4.7 k ohm resistor when using with the 256 fs clock.
The sampling frequency can be selected in the range from 32 kHz to 48 kHz.
The sampling frequency is specified with OPR register ($00).(The sampling frequency of fs = 32 or 48 kHz can be
specified only KP2V Extended mode.)
Sampling
frequency (fs)
32.0 kHz
37.8 kHz
44.1 kHz
48.0 kHz
XI input frequency
384fs
256fs
12.288 MHz
8.192 MHz
14.5152 MHz
9.6768 MHz
16.9344 MHz
11.2896 MHz
18.432 MHz
12.288 MHz
Available mode
(See Note.)
E
N,E
N,E
E
Note ;
N = KP2 standard mode
E = KP2V extended mode
In addition, the thing that input 37MHz in XI by a maximum is possible in only through-mode.
Connect a resistor and capacitor to PLLC terminal as shown below for adjustment of PLL in the LSI.
PLLC
KP2V2
2. Initial clear
/IC
This LSI requires initial clear at power on. The initial clear is performed by inputting "L" to /IC terminal.
/IC
2msec min
6
YSS915
3. Analog audio interface
MICIN, ADC1, ADC2, AOL, AOR, VREF
This LSI has a one channel (MIC input) of Delta-Sigma type A/D converter, thus requiring the external circuits as
described below.
The output of AOL and AOR can be used as a direct signal from the microphone because the volume of the signal is
controlled as analog signal which is outputted from AOL and AOR.
Analog input section
Analog output section
Other section
ti
KP2V2
VREF
MIC
AOL
MICIN
AOL
ADC1
AOR
AOR
ADC2
AVSS
AVDD
7
YSS915
4. Digital audio interface
-1)
SDSY, BCI,DI, L/R,DO,BCO
Digital audio signal is inputted through BCI, SDSY and DI pins using the following format.
BCI
SDSY
15 14 13 12 11 10 9
DI(16bit )
8
7
6
5
4
3
2
1
15 14 13 12 11 10 9
0
8
7
6
5
4
3
2
1
0
DI(18bit )
17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DI(20bit )
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DI(24bit )
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Lch
-2)
Rch
Digital audio signal is outputted through BCO, L/R, and DO pins using the following format.
BCO
L/R
DO(16bit )
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DO(18bit )
17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DO(20bit )
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DO(24bit )
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Lch
-3)
Rch
The digital audio interface is made compatible with the following format with OPR register ($00) and DAR register
($04).
Format
BCI
BCO
Format1
Format2
64fs
64fs
Format3
32-96fs
64fs
48fs
Format4
-
64fs
BCI
OPR
[5]
1
0
0
0
0
0
DAR
[3:2]
*
0
1
2
3
*
MDR
[3]
0
0
Available
mode
N,E
N,E
0
E
1
E
N=KP2 standard mode
E=KP2V extended mode
Format1
Use this format when digital audio input is not used.
Format2
Use this format when digital audio input is used.
BCI is able to accept any frequency between including 96fs from 32fs, while BCO outputs only 64 fs.
BCI, SDSY and DI signals must be synchronized with XI clock.
Format3
Use this format when digital audio input is used.
BCI input signal is passed to the BCO output, being inverted.
SDSY input signal is passed to the L/R output, being delayed by 2.5 clocks of BCI.
BCI, SDSY and DI signals must be synchronized with XI clock.
8
YSS915
Format4
This format is used to interface with the A/D converter which outputs data MSB justified.
Connect BCO pin of this LSI to the bit clock input pin of the A/D converter, L/R pin to LR clock input pin of the
converter, and DI pin to data output pin of the converter.
BCO outputs 64 fs without regarding to the value of DAT[3:2].
Keep the pins BCI and SDSY open.
The format 4 is as described below.
0
1
31 0
1
BCO
L/R
MSB
LSB
MSB
LSB
DI
DO(16bit )
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DO(18bit )
17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DO(20bit )
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DO(24bit )
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Lch
-4)
Rch
Length of data word of the digital audio signal can be set by the DAR register ($04) to 16, 18, 20 or 24 bits (only in
KP2V extended mode). When the data word is 24 bit long, only upper 20 bits are used for processing internal signal.
Length of
inputted word
16bit
18bit
20bit
24bit
DAR
[5:4]
0
1
2
3
Length of
outputted word
16bit
18bit
20bit
24bit
DAR
[1:0]
0
1
2
3
Note ; In KP2 standard mode, both of the input and output word lengths are only 16 bits.
-5) The
thru-mode can be selected by using DAR register ($04) (only in KP2V extended mode).
In the thru-mode ;
BCI input signal is passed to the BCO output, being inverted.
SDSY input signal is passed to the L/R output, being delayed by 2.5 clocks of BCI.
DI input signal is passed to the DO output, being delayed by 2.5 clocks of BCI.
When the sampling frequency is in the range from 64 kHz to 96 kHz, the input signal can be passed through this
LSI without deteriorating, for example, the 24 bit data accuracy at the sampling frequency of 96 kHz.
The through-mode is enabled when the value of DAR[bit3:2] is “01”, “10” or 11”.
9
YSS915
5. Microcomputer interface
/CS, /SCK, CDI, CDO, DEPI
These are 8 bit serial interface for writing data into or reading data from internal registers of this device.
Do not write or read data into or from this device in 200 msec from the initial clear moment (rise moment of /IC).
-1)
Writing data
Set the address of an internal register into the first byte, and data into the second byte.
Use the following format.
-2)
Reading data (only in KP2V extended mode)
For reading data, only MLR register ($10) is provided.
Use the following format.
-3)
DEPI
When DEPI is "H", de-emphasis is enabled regardless of the state of internal register.
When DEPI is "L", setting of OPR register ($00) is valid.
6. Others
-1)
P0 ,ZERO
P0
P0 pin outputs the value of the register PHC[0]($08). This value is outputted when OPR($01) has been set after the
initial clear. This pin is in HZ state until OPR($01) is set.
This function is valid when MDR[0]($1C) is ‘H’. When MDR[0]($1C) is ‘L’, this pin always outputs ‘L’ like
YSS903 does.
-2)
ZERO
When both of the digital audio outputs, L and R, have been “zero(0)” for the period equivalent to 511 samplings, the zero
level detection function activates to make ZERO pin output ‘L’ . In other period, this pin is in ‘H’ state.
This value is outputted when OPR($01) has been set after the initial clear. This pin is in HZ state until OPR($01) is set.
This function is valid when MDR[1]($1C) is ‘H’. When MDR[1]($1C) is ‘L’, this pin always outputs ‘L’ like
YSS903 does.
10
OPERATIONS
Process flow chart
1. Karaoke program
Flow of signal in processing Karaoke audio signal in this LSI is as described by the following diagram.
The Karaoke program can be used in both KP2 standard mode or KP2V extended mode.
In KP2 standard mode, the same functions as those of KP2 can be used, and most of the registers of KP2V and KP2 are compatible with each other,
except that the registers related to analog audio input and analog microphone echo output cannot be used because KP2V does not have these functions.
In KP2V extended mode, every function of the Karaoke program can be used.
Mono-echo, stereophonic echo, 3 D echo and super 3D echo provided in the evaluation board can be obtained by combining the
following microphone echo/Reverb echo, microphone key control and/or microphone YMERSION functions appropriately.
11
2. Movie and music program
Flow of signal in processing movie and music audio signal in this LSI is as follows
The movie or music program can be used in KP2V extended mode
The fifteen types of the surround mode provided in the evaluation board are obtained by combining the following
tone control, initial reflection sound and/or YMERSION functions appropriately.
12
OPERATIONS OF FUNCTIONS
1. Karaoke program
Functions for processing the Karaoke audio signals are described here.
Function
De-emphasis
Input Fader
Voice Cancel
Key Control
Tone Control
Surround
Microphone
level detection
Microphone
Echo
Stereo Echo
Reverberation Echo
Microphone
key control
Microphone
Y mersion
Soft Mute
Volume
Description
De-emphasizes audio input signal that has been emphasized.
Specifies a sampling frequency and on/off of de-emphasis.
Controls fade-in/out for audio input signal.
Specifies fade-in/out for each channel after setting fade time (See Note.)
Reduces mid-range signal of inputted audio signal that is located in the center of the sound field such vocal signal
generated by stereophonic CD.
Specifies voice cancel on/off after setting sampling frequency and fade time. (See Note.)
Changes key of inputted audio signal, and controls key shift for audio input signal. The amount of key shift must
be specified.
Controls tone of inputted audio signal in three frequency bands.
Specifies the levels for bass (fc = 200 Hz), treble (fc = 5 kHz), and mid-tone (fc = 1 kHz) after selecting a
sampling frequency.
Applies Y mersion surround to audio input signal. One of four types of surround modes is selected and Output
levels for R and L channels are set individually based on the selected surround mode.
Detects and reads the level of signal input from microphone.
Specifies the time constant for level detection.
Applies echo to signal from microphone processed by setting delay and feedback.
Specifies delay time, feedback level and output signal level for L/R.
Expands echo by providing stereophonic output.
Damps echo naturally by adding reverb function.
Applies microphone echo by subjecting signal inputted from microphone to key shift.
Specifies the amount of key shift and output signal level for L/R.
Applies YMERSION to microphone echo to obtain expansion that is specific to YMERSION.
Specifies output signal level for L/R.
Noiseless mute, Specifies on/off.
Controls volume.
Some of the functions can be set in either of KP2 standard mode or KP2V extended mode, some only in KP2V
extended mode.
Note ; The fade time is applicable to the input fader and voice cancel functions.
13
Control register
Controllable
Coefficient register
mode
OPR[1]
N,E
OPR[7:6]
VCR[1:0]
N,E
TMR[7:0]
VCR[4]
TMR[7:0]
N,E
OPR[7:6]
KSR[4:0]
N,E
TCR[7:0]
RVR[3:0]
OPR[7:6]
KSR[6:5]
C01,C04
MLR[7:0]
C14
C05,C08,C0B,C0C
C16,C17,C00,C03
C1A,C1B
RVR[4]
KER[7:0]
C18,C19
C1C,C1D
OPR[3]
C02,C06,C09,C0A
C0D,C0E,C0F,C15
C1E,C1F
E
N,E
E
N,E
E
E
E
E
N,E
N,E
2. Movie and music program
Functions for processing the movie and music signals are described here.
The movie and music program can be used in KP2V extended mode.
Function
Description
Control register
Coefficient register
De-emphasis
De-emphasizes audio input signal that has been emphasized.
Specifies a sampling frequency and on/off of de-emphasis.
Tone Control
Controls tone of inputted audio signal in three frequency bands.
Specifies the levels for bass (fc = 200 Hz), treble (fc = 5 kHz), and mid-tone (fc = 1 KHz) after selecting a sampling
frequency.
Applies surround that uses initial reflected sound synthesizing system to audio input signal.
Surround 1
(Initial reflected One of four types of surround modes is selected and Output levels for R and L channels are set individually based on the
sound) selected surround mode.
Surround 2
(Y mersion)
Soft Mute
Volume
Applies Y mersion surround to audio input signal.
One of two types of surround modes is selected and Output levels for R and L channels are set individually based on the
selected surround mode.
Noiseless mute, Specifies on/off.
OPR[1]
OPR[7:6]
TCR[7:0]
RVR[3:0]
OPR[7:6]
KSR[6:5]
C10,C11,C12
C13,C18,C19
KSR[7]
C1A,C1B,C1C
C1D,C01,C04
OPR[3]
C02,C06,C09,C0A,
C0E,C0F,C15,C16
C17,C1E,C1F
Controls volume.
This LSI presents the features of sound field by using a combination of tone control, surround (initial reflected sound)and surround(Y mersion).
The tone control determines frequency characteristics of the sound field.
Initial reflected sound synthesis determines extent and depth of sound field to characterize a surround environment(concert hall and stadium).
Y mersion surround determines size and extent of reverberation.
14
YSS915
REGISTERS
This LSI is controlled by setting data into the registers.
The address, name and function of each register is outlined as follows.
Address
Name
$00
$01
$02
$03
$04
$05
$06
$07
$08
$10
$1C
$20
OPR
KSR
VCR
TMR
DAR
TCR
RVR
KER
PHC
MLR
MDR
C00
$3F
C1F
Function
Controls internal operations.
Controls key and surround.
Controls input fader and voice cancel.
Controls fade time for input fader and voice cancel.
Controls digital audio I/O format.
Controls tone (bass, treble).
Controls tone (mid-range) and Reverb-echo.
Controls key for microphone.
Port output register.
Reads microphone level.
Switching KP2 standard/KP2V extension mode, and others.
Coefficient register (controls volume and delay.)
Controllable and uncontrollable registers (bits) vary according to the following modes.
The mode is specified as follows according to the status of bit 7 of MDR register($1C).
Code
N
E
Mode
KP2 standard mode
KP2V extended mode
MDR($1C)[bit 6]
0
1
15
YSS915
1. Functions
Functions, default value and controllable mode are as shown below.
The default value is the value that is set at initial clear or the one obtained in other than the controllable mode.
-1)
bit
Function
0
Unused (Set "1" here.)
Controlling De-emphasis
"1" = De-emphasis is disabled.
"0" = De-emphasis is enabled.
Note ; Whenever DEPI is "H", de-emphasis is enable regardless of the status of
this bit.
Unused (Set "0" here.)
Controlling soft mute
"1" = Soft mute is off (Fade-in at (1024/fs (sec))
"0" = Soft mute is on (Fade-out at (1024/fs (sec))
Note ; fs = sampling frequency (Hz)
Controlling internal accumulator output clear on/off
"1" = Internal accumulator output clear is on.
"0" = Internal accumulator output clear is off (Normal operation).
Controlling sync mode
"1" = Internal synchronization mode
(Digital audio input signals (BCI, SDSY and DI) are not used.)
"0" = External synchronization mode
(Digital audio input signals (BCI, SDSY and DI) are used.)
Selecting sampling frequency
‘b7 b6’
"0 0 " =37.8kHz
"0 1 " =44.1kHz
"1 0 " =32.0kHz
"1 1 " =48.0kHz
Note ; The frequencies 32.0 kHz and 48.0 kHz are valid in KP2V extension mode.
1
2
3
4
5
6
7
16
OPR($00): Control of internal operation
Default Controllable
mode
1
-
1
N,E
1
-
1
N,E
1
N,E
1
N,E
1
N,E
0
E
YSS915
-2)
KSR($01) : Control of key and surround
bit
0
1
2
3
4
5
6
7
Function
Default Controllable
mode
Amount of key shift for audio signal key control
(This function is valid on Karaoke program. For the correspondence between
the setting value for key control and the amount of key shift, refer to the table
below.)
Selecting a type of surround (Y mersion) for Karaoke program, or a type of
surround (initial reflected sound) for movie or music program.
(For the Correspondence between the setting value and the surround type,
refer to the table below.)
Selecting a surround mode for Y mersion (valid in movie and music mode)
"0" = MODE0
"1" = MODE1
0
0
0
0
0
N,E
0
0
N,E
0
E
Correspondence between the setting value for key control
and the amount of key shift for audio signal
KSR
bit
4-0
0F
0E
0D
0C
0B
0A
09
08
07
06
05
04
03
02
01
00
Amount of key shift
9-1/2 keys up
1 octave up
3-1/2 keys up
3 keys up
2-3/4 keys up
2-2/4 keys up
2-1/4 keys up
2 keys up
1-3/4 keys up
1-2/4 keys up
1-1/4 keys up
1 key up
3/4 key up
2/4 key up
1/4 key up
No key shift
bit
4-0
1F
1E
1D
1C
1B
1A
19
18
17
16
15
14
13
12
11
10
Amount of key shift
1/4 key down
2/4 key down
3/4 key down
1 key down
1-1/4 keys down
1-2/4 keys down
1-3/4 keys down
2 keys down
2-1/4 keys down
2-2/4 keys down
2-3/4 keys down
3 keys down
3-1/2 keys down
1 octave down
7 keys down
9-1/2 keys down
Correspondence between the surround type and surround selection bit
bit
65
00
01
10
11
Note ;
KSR
Surround for Karaoke program
Surround for movie and music program
(Y mersion)
(Initial reflected sound)
PSEUDO-STEREOPHONIC SOUND
HALL0 (See Note.)
LIVE
HALL1 (See Note.)
MOVIE
STADIUM
KARAOKE
ROCK CONCERT
HALL0 ® Concert hall that provides standard reverberation
HALL1 ® Concert hall that provides long reverberation
17
YSS915
1-3)
bit
0
1
2
3
4
5
6
7
1-4)
bit
0
1
2
3
4
5
6
7
18
VCR($02) : Control of input fader and voice cancel (valid for Karaoke program)
Function
Controlling fade-in/out at digital audio input L channel
“ 1 ” = Starting fade in
“ 0 ” = Starting fade out
Note ; Before this bit is set, set fade time into TMR ($03).
Controlling fade-in/out at digital audio input R channel
“ 1 ” = Starting fade in
“ 0 ” = Starting fade out
Note ; Before this bit is set, set fade time into TMR ($03)
Unused (Set "0" here.)
Unused (Set "0" here.)
Controlling voice cancel on/off
“ 1 ” = On (switching from thru-path to voice-canceled path)
“ 0 ” = Off (switching from voice-canceled path to thru-path)
Note ; Before this bit is set, set cross fade time into TMR ($03).
Fade-in/fade-out for microphone echo input
“ 0 ” = Starting fade in
“ 1 ” = Starting fade out
Note ; Fade time = 1024/fs(sec)
Unused (Set "0" here.)
Unused (Set "0" here.)
Default
Controllable
mode
0
N,E
0
N,E
0
0
-
0
N,E
0
E
0
0
-
TMR($03) : Control of fade time for input fader and voice cancel (valid for Karaoke program)
Function
Fade time for input fader and voice cancel
Fade time = 1024/fs(sec) when TMR=00h
1048576/fs/TMR(sec) when TMR=other than 00h
Note ; fs = sampling frequency
Default Controllable
mode
0
0
0
0
0
N,E
0
0
0
YSS915
-5)
bit
0
1
2
3
4
5
6
7
DAR($04) : Control of digital audio I/O format
Function
Selecting digital audio output data word length
“b1 b0”
“ 0 0 ” = 16 bits
“ 0 1 ” = 18 bits
“ 1 0 ” = 20 bits
“ 1 1 ” = 24 bits
This function is valid when bit 5 of OPR($00) = 0. When this bit = 1, the digital
audio output synchronizes with internal clock (64 fs).
“b3 b2”
“ 0 0 ” = Synchronizing with internal clock (64 fs)
“ 0 1 ” = Synchronizing with BCI (64 fs)
“ 1 0 ” = Synchronizing with BCI (48 fs)
“ 1 1 ” = Synchronizing with BCI (32 fs)
Selecting digital audio input data word length
“b5 b4”
“ 0 0 ” = 16bit
“ 0 1 ” = 18bit
“ 1 0 ” = 20bit
“ 1 1 ” = 24bit
Selecting an output to digital audio output terminal (BCO, L/R and DO)
“b7 b6”
“ 0 0 ” = Normal (Internally processed data are outputted.)
“ 0 1 ” = BCO, L/R and DO are fixed to "L".
“ 1 0 ” = BCI, SDDY and DI are thru-outputted.
(For the details, refer to 4-5 in Page 9.)
“ 1 1 ” = Inhibited
Default Controllable
mode
0
E
0
0
E
0
0
E
0
0
E
0
19
YSS915
-6)
TCR($05) : Control of tone (bass, treble)
bit
Function
0
1
2
3
4
5
6
7
Controlling level of treble (fc = 5 kHz) (fc = cutoff frequency)
(For the correspondence between the setting value and the level, refer to the
table below.)
-7)
RVR($06) : Control of tone (mid-range) and Reverb echo
Controlling level of bass (fc = 200 Hz) (fc = cutoff frequency)
(For the correspondence between the setting value and the level, refer to the
table below.)
bit
0
1
2
3
4
5
6
7
Function
Controlling level of mid-tone (fc = 1 kHz) (fc = center frequency)
(For the correspondence between the setting value and the level, refer to the
table below.)
Controlling reverb on/off (valid for Karaoke program)
“ 0 ” = Reverb off
“ 1 ” = Reverb on
Selection of low pass filter for microphone echo
“ 0 ” = Cut off frequency equivalent to that of YSS903 (Standard)
“ 1 ” = Cut off frequency higher than that of YSS903 (Wide)
Unused (Set "0" here.)
Unused (Set "0" here.)
bit
3-0
7
6
5
4
3
2
1
0
F
E
D
C
B
A
9
8
20
Default Controllable
mode
0
0
0
0
0
0
0
0
E
E
Default Controllable
mode
0
0
0
0
E
0
E
0
E
0
0
-
Correspondence between the setting value and the level
TCR
RVR
Level of
Level of
Level of
bit
bit
bass
treble
mid-tone
7-4
3-0
Inhibited
Inhibited
Inhibited
7
7
Inhibited
Inhibited
Inhibited
6
6
+10dB
+10dB
+10dB
5
5
+8dB
+8dB
+8dB
4
4
+6dB
+6dB
+6dB
3
3
+4dB
+4dB
+4dB
2
2
+2dB
+2dB
+2dB
1
1
0dB
0dB
0dB
0
0
-2dB
-2dB
-2dB
F
F
-4dB
-4dB
-4dB
E
E
-6dB
-6dB
-6dB
D
D
-8dB
-8dB
-8dB
C
C
-10dB
-10dB
-10dB
B
B
Inhibited
Inhibited
Inhibited
A
A
Inhibited
Inhibited
Inhibited
9
9
Inhibited
8
Inhibited
8
Inhibited
YSS915
KER($07) : Control of Key for microphone
-8)
bit
Function
0
1
2
3
4
5
6
7
Default Controllable
mode
Amount of key shift for controlling microphone key at L channel
(This function is valid on Karaoke program. For the correspondence between
the setting value and the amount of key shift, refer to the table below.)
Amount of key shift for controlling microphone key at R channel
(This function is valid on Karaoke program. For the correspondence between
the setting value and the amount of key shift, refer to the table below.)
0
0
0
0
0
0
0
0
E
E
Correspondence between the setting value and the amount of key shift
bit
3-0
7
6
5
4
3
2
1
0
F
E
D
C
B
A
9
8
-9)
KER
Amount of key shift at
bit
L channel
7-4
Inhibited
7
Inhibited
6
1 octave up
5
3-1/2 keys up
4
2 keys up
3
20 cents up
2
10 cents up
1
No key shift
0
10 cents down
F
20 cents down
E
2 keys down
D
3-1/2 keys down
C
1 octave down
B
Inhibited
A
Inhibited
9
8
Inhibited
Amount of key shift at
R channel
Inhibited
Inhibited
1 octave up
3-1/2 keys up
2 keys up
20 cents up
10 cents up
No key shift
10 cents down
20 cents down
2 keys down
3-1/2 keys down
1 octave down
Inhibited
Inhibited
Inhibited
PHC($08) : Output port register
bit
0
1
2
3
4
5
6
7
Function
This value is outputted at PO pin.
This function is enabled when MDR[0]($1C) = ‘H’. When it is ‘L’, PO pin is
always at ‘L’ state.
Unused (Set "0" here.)
Unused (Set "0" here.)
Unused (Set "0" here.)
Unused (Set "0" here.)
Unused (Set "0" here.)
Unused (Set "0" here.)
Unused (Set "0" here.)
Default Controllable
mode
0
E
0
0
0
0
0
0
0
-
21
YSS915
-10)
bit
Function
0
1
2
3
4
5
6
7
Detected microphone level
( unsigned binary of 8bits )
-11)
bit
0
1
2
3
4
5
6
7
22
MLR($10) : Microphone level read register (valid for Karaoke program)
Default Controllable
mode
0
0
0
0
0
0
0
0
E
MDR($1C) : Switching KP2 standard mode/KP2V extended mode, and others
Function
Specifies whether the value of PHC[0]($08) is outputted at PO pin.
“ 0 ” = Not outputted (The same as YSS903)
“ 1 ” = Outputted
Specifies whether the result of zero level detection is outputted at ZERO pin.
“ 0 ” = Not outputted (The same as YSS903)
“ 1 ” = Outputted
Selects band width for microphone echo
“ 0 ” = Sampling frequency is 8 kHz. (The same as YSS903)
“ 1 ” = Sampling frequency is 12 kHz.
Connection with MSB justified data output A/D converter
“ 0 ” = Direct connection not allowed (The same as YSS903)
“ 1 ” = Direct connection allowed
Selecting karaoke/movie & music program
“ 0 ” = Karaoke program
“ 1 ” = Movie & music program
(When switching the program, be sure to mute, change the setting of
coefficient register and this bit, and then release the mute when 250 ms
has passed.)
Unused
Switching KP2 standard mode/KP2V extended mode
“ 0 ” = KP2 standard mode
“ 1 ” = KP2V extended mode
Unused (Set "0" here.)
Default Controllable
mode
0
E
0
E
0
E
0
E
0
E
0
-
0
N,E
0
-
YSS915
-12)
C**($20 to $3F) : Coefficient registers (Controlling volume and delay)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
C7
C6
C5
C4
C3
C2
C1
C0
C7-C0:Sets volume coefficient or delay coefficient
· For the addresses of the registers their functions for Karaoke and movie & music programs, refer to the following
table and flow chart described in "OPERATIONS" section.
· For the relation between the setting value of coefficient, and volume level and delay time, refer to the formula
shown later.
· When the coefficient registers controllable only in KP2V extended mode is used in the KP2 standard mode, the
following preset values are used as their coefficient of address, and their setting values are not used.
· The values of the registers are indefinite immediately after turning on the power, be sure to set the register values in
the controllable mode before releasing the mute.
Name, function, preset value and controllable mode of the addresses of the coefficient
register for Karaoke program
Register
address
Name
$20
$21
$22
$23
$24
$25
$26
$27
$28
$29
$2A
$2B
$2C
$2D
$2E
$2F
$30
$31
$32
$33
$34
$35
$36
$37
$38
$39
$3A
$3B
$3C
$3D
$3E
$3F
C00
C01
C02
C03
C04
C05
C06
C08
C09
C0A
C0B
C0C
C0D
C0E
C0F
C14
C15
C16
C17
C18
C19
C1A
C1B
C1C
C1D
C1E
C1F
Function
Echo L channel output mixing level
Surround L channel output mixing level
Audio L channel output mixing level
Echo R channel output mixing level
Surround R channel output mixing level
Microphone echo L channel delay
Audio R channel output mixing level
Unused
Microphone echo R channel delay
Digital input L - L channel mixing level
Digital input L - R channel mixing level
Microphone echo L channel feedback level
Microphone echo R channel feedback level
Microphone echo input level
Digital input R - L channel mixing level
Digital input R - R channel mixing level
Unused
Unused
Unused
Unused
Time constant for microphone level detection
Microphone direct sound output mixing level
Microphone echo L channel mixing level
Microphone echo R channel mixing level
Microphone key control L channel mixing level
Microphone key control R channel mixing level
Stereo-phonic echo L channel mixing level
Stereo-phonic echo R channel mixing level
Microphone echo Y mersion L channel mixing level
Microphone echo Y mersion R channel mixing level
L channel total output level
R channel total output level
Preset Controllable
value
mode
$00
$1F
$7F
$7F
$00
$00
$00
$00
$00
$00
$7F
$7F
N,E
N,E
N,E
N,E
N,E
N,E
N,E
N,E
N,E
N,E
N,E
N,E
N,E
N,E
N,E
E
E
E
E
E
E
E
E
E
E
E
E
23
YSS915
Name, function, and controllable mode of the addresses of the coefficient register for
movie and music program
Register Name
address
$20
$21
$22
$23
$24
$25
$26
$27
$28
$29
$2A
$2B
$2C
$2D
$2E
$2F
$30
$31
$32
$33
$34
$35
$36
$37
$38
$39
$3A
$3B
$3C
$3D
$3E
$3F
C01
C02
C04
C06
C09
C0A
C0E
C0F
C10
C11
C12
C13
C15
C16
C17
C18
C19
C1A
C1B
C1C
C1D
C1E
C1F
Function
Controllable
mode
Unused
Surround (Y mersion) L channel output mixing level
Audio & surround (initial reflected sound) L channel output mixing level
Unused
Surround (Y mersion) R channel output mixing level
Unused
Audio & surround (initial reflected sound) R channel output mixing level
Unused
Unused
Digital input L - L channel mixing level
Digital input L - R channel mixing level
Unused
Unused
Unused
Digital input R - L channel mixing level
Digital input R - R channel mixing level
Surround (initial reflected sound) input 1 L channel mixing level
Surround (initial reflected sound) input 1 R channel mixing level
Surround (initial reflected sound) input 2 L channel mixing level
Surround (initial reflected sound) input 2 R channel mixing level
Unused
Microphone direct sound output mixing level
Audio L channel output mixing level
Audio R channel output mixing level
Surround (initial reflected sound) L channel mixing level
Surround (initial reflected sound) R channel mixing level
Surround (Y mersion) input 1 L channel mixing level
Surround (Y mersion) input 1 R channel mixing level
Surround (Y mersion) input 2 L channel mixing level
Surround (Y mersion) input 2 R channel mixing level
L channel total output level
R channel total output level
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
Correspondence between setting value and level of C15
bit
7-0
00
01
02
03
04
05
06
07
08
09
0A
0B
24
Level
0 dB
-1.5dB
-3.0dB
-4.5dB
-6.0dB
-7.5dB
-9.0dB
-10.5dB
-12.0dB
-13.5dB
-15.0dB
-16.5dB
bit
7-0
0C
0D
0E
0F
10
11
12
13
14
15
16
17
C15
Level
-18.0dB
-19.5dB
-21.0dB
-22.5dB
-24.0dB
-25.5dB
-27.0dB
-28.5dB
-30.0dB
-31.5dB
-33.0dB
-34.5dB
bit
7-0
18
19
1A
1B
1C
1D
1E
1F
20
|
FF
Level
-36.0dB
-37.5dB
-39.0dB
-40.5dB
-42.0dB
-43.5dB
-45.0dB
MUTE
Inhibited
|
Inhibited
YSS915
Relation between setting value of coefficient registers ($20 to $3F), and volume level and
delay time
25
YSS915
ELECTRICAL CHARACTERISTICS
1. Absolute maximum ratings
Item
Code
Rating
Unit
Power source voltage
Digital input voltage
Analog input voltage
Operating temperature
Storage temperature
AVDD,DVDD
VI
VI
Top
Tstg
-0.3 to 7.0
-0.5 to DVDD + 0.5
-0.5 to AVDD + 0.5
0 to 70
-50 to 125
V
V
V
°C
°C
2. Recommended operating conditions
Item
Digital power source voltage
Analog power source voltage
Operating temperature
Code
Minimum
Typical
Maximum
Unit
DVDD
AVDD
Top
4.75
4.50
0
5.00
5.00
25
5.25
5.25
70
V
V
°C
3. DC characteristics (Conditions : Ta = 0 to 70 °C, DVDD = 5.0 +/- 0.25 V)
Item
Code
Condition
Power source current
IDD
VDD = 5.0V
Input voltage H level (1) VIH1 (See Note 1)
Input voltage H level (2) VIH2 (See Note 2)
Input voltage L level
VIL
Input leakage current
ILK
Output voltage H level
VOH
IOH = -0.4mA
Output voltage L level
VOL
IOL = 1.6mA
Notes ;
(1) Applies to input terminals other than XISEL.
(2) Applies to input terminal XISEL.
Minimum
Typical
Maximum
Unit
80
mA
V
V
V
mA
V
V
2.0
3.5
0.8
10
-10
VDD-1.0
0.4
4. Analog characteristics (Conditions : Ta = 25 °C, DVDD=AVDD = 5.0 V)
Item
Code
Condition
Minimum
Typical
Maximum Unit
Analog input voltage
VIA
(See Note 1)
(See Note 2)
Analog output voltage
VOA
2.8
(See Note 3)
0.04
0.2
A DC · Total harmonic distortion THD+N (See Note 5,6 ) 0 dB
DR
75
80
(See Note 4,5,6 ) -60 dB
· Dynamic range
Analog through
0.005
0.02
· Total harmonic distortion THD+N (See Note 6,7 ) 0 dB
DR
90
95
(See Note 4,6,7 ) -60 dB
· Dynamic range
Notes ; Input signal frequency is 1KHz.
(1) Peak to peak value. Applies to MICIN terminal
(2) Any voltage can be used if input resistor attached externally to MICIN is selected properly
VIA=R/9.4K, When value of a resistor was shown with R,
(3) Peak to peak value. Applies to AOL and AOR terminals. The output voltage is in proportion to AVDD.
(4) Uses IHF-A
(5) The signal is outputted through MICIN inputs to digital outputs via Volume.
(6) Input resistor attached externally to MICIN : 47 kW. 0 dB = 4.65 Vpp
(7) The signal is outputted through MICIN inputs to AOL and AOR via volume.
26
V
V
%
dB
%
dB
YSS915
5. AC characteristics (Conditions : Ta = 0 to 70 °C, DVDD = 5.0 +/- 0.25 V)
XI
XI
BCI
BCI
DI, SDSY
DO, L/R
/CS
/SCK
/CS, /SCK
CDI
CDO
/IC
Item
Input frequency
Duty factor
Frequency
On/off time
Transfer time
Setup time
Hold time
Access time
Setup time
On/off time
Transfer time
Setup time
Hold time
Access time
Hold time
Code
fc (See Note 1)
fc (See Note 2)
Rc
fBC
tBO
tBT
tDS
tDH
tD
tCS
tSO
tCT
tSS
tSH
tCD
tIX (See Note 9)
tIL(See Note 10)
Minimum
12.0
8.0
Typical
50
1.0
100 (See Note 6)
80 (See Note 7)
80 (See Note 7)
-20
1/50fs (See Note 8)
1/50fs (See Note 8)
1/100fs(See Note 8)
1/100fs(See Note 8)
220
2
100
Maximum
18.5 (See Note 3)
12.5 (See Note 4)
Unit
MHz
MHz
%
4.7(See Note 5)
MHz
ns
20
ns
ns
ns
20
ns
s
s
1/150fs(See Note 8)
s
s
s
600
ns
ms
ms
Notes ;
(1) XI = 384 fs (See Note 8.)
(2) XI = 256 fs (See Note 8.)
(3) 37 MHz in thru mode
(4) 25 MHz in thru mode
(5) 6.2 MHz in thru mode
(6) 70 ns in thru mode
(7) 50 ns in thru mode
(8) fs : sampling frequency
(9) Just after turn on the power
(10) In operation
27
YSS915
tBO
tBT
2.0V
BCI
tBT
tBO
0.8V
tDS
tDH
2.0V
DI,SDSY
0.8V
BCO
0.4V
tD
VDD-1.0V
0.4V
DO,L/R
tCT
tCT
2.0V
/CS
tCS
tCS
0.8V
tCT
tSO
/SCK
tCT
tSO
2.0V
0.8V
tSS
tSH
2.0V
CDI
0.8V
tCD
CDO
4.75V
DVDD
tIX
/IC
28
0.8V
tIL
0.8V
0.8V
YSS915
A procedure to change Normal mode to Through mode
Normal mode means that it can apply the sound effect using internal DSP function and the sampling frequency is
between 32kHz and 48kHz in this mode.
Through mode means that the digital input data fed to YSS915 is bypassed to digital output pin without processing
by DSP and the sampling frequency is 64kHz to 96kHz.
For example, when the sampling frequency is changed from 48kHz( called fs-single) to 96kHz( called fs-double),
master clock frequency fed to XI pin of YSS915 may be changed according to the fs(sampling frequency).
In this case please refer to the following procedure.
A. Change Normal mode (fs-single) to Through mode (fs-double)
1.Mute Analog output of the product
2.Set /IC=”0” of YSS915
3.Change the master clock frequency
(XI of YSS915) from “single “ to “double”
4.Wait 2msec or more
5.Set /IC=”1”
6.Set the parameters from the microprocessor to YSS915 as followed
opr [7:0] = 8’bxx00x0x1
mdr [7:0] = 8’b01100000
dar [7:0] = 8’b10xx01xx or 8’b10xx10xx
x means don’t care
or
8’b10xx11xx
7.Disable to mute Analog output of the product
Mute of Analog out
mute
/IC of YSS915
XI of YSS915
single
double
2msec min
Setting from microprocessor
to YSS915
setting
B. Change Through mode (fs-double) to Normal mode (fs-single)
1.Mute Analog output of the product
2.Set /IC=”0” of YSS915
3.Change the master clock frequency (XI of YSS915) from “double“ to “single”
4.Wait 2msec or more
5.Set /IC=”1”
6.Set the parameters from the microprocessor to YSS915 as the same way after power on
Mute of Analog out
mute
/IC of YSS915
XI of YSS915
Setting from microprocessor
to YSS915
double
single
2msec min
setting
29
YSS915
EXTERNAL DIMENSIONS
30
YSS915
Memo
31
YSS915
IMPORTANT NOTICE
1. Yamaha reserves the right to make changes to its Products and to this document without
notice. The information contained in this document has been carefully checked and is believed to
be reliable. However, Yamaha assumes no responsibilities for inaccuracies and makes no
commitment to update or to keep current the information contained in this document.
2. These Yamaha Products are designed only for commercial and normal industrial applications,
and are not suitable for other uses, such as medical life support equipment, nuclear facilities,
critical care equipment or any other application the failure of which could lead to death, personal
injury or environmental or property damage. Use of the Products in any such application is at the
customer’s sole risk and expanse.
3. YAMAHA ASSUMES NO LIABILITY FOR INCIDENTAL, CONSEQUENTIAL OR SPECIAL
DAMAGES OR INJURY THAT MAY RESULT FROM MISAPPLICATION OR IMPROPER USE
OR OPERATION OF THE PRODUCTS.
4. YAMAHA MAKES NO WARRANTY OR REPRESENTATION THAT THE PRODUCTS ARE
SUBJECT TO INTELLECTUAL PROPERTY LICENSE FROM YAMAHA OR ANYTHIRD
PARTY, AND YAMAHA MAKES NO WARRANTY OR REPRESENTATION OF NONINFRINGEMENT WITH RESPECT TO THE PRODUCTS. YAMAHA SPECIFICALLY
EXCLUDES ANY LIABILITY TO THE CUSTOMER OR ANY THIRD PARTY ARISING FROM
OR RELATED TO THE PRODUCTS’ INFRINGEMENT OF ANY THIRD PARTY’S
INTELLECTUAL PROPERTY RIGHTS, INCLUDING THE PATENT, COPYRIGHT,
TRADEMARK OR TRADE SECRET RIGHTS OF ANY THIRD PARTY.
5. EXAMPLES OF USE DESCRIBED HEREIN ARE MERELY TO INDICATE THE
CHARACTERISTICS AND PERFORMANCE OF YAMAHA PRODUCTS. YAMAHA ASSUMES
NO RESPONSIBILITY FOR ANY INTELLECTUAL PROPERTY CLAIMS OR OTHER
PROBLEMS THAT MAY RESULT FROM APPLICATIONS BASED ON THE EXAMPLES
DESCRIBED HEREIN. YAMAHA MAKES NO WARRANTY WITH RESPECT TO THE
PRODUCTS EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR USE AND TITLE.
Note) The Specifications of this product are subject to improvement changes without prior notice
AGENCY
COPYING PROHIBITED
32
© 1987
YAMAHA CORPORATION
Address inquiries to:
Semiconductor Sales & Marketing Department
n Head Office
203,Matsunokijima, Toyooka-mura,
Iwata-gun, Shizuoka-ken, 438-0192
Tel. 81-539-62-4918 Fax. 81-539-62-5054
n Tokyo Office
2-17-11, Takanawa, Minato-ku,
Tokyo, 108-8568
Tel. 81-3-5488-5431 Fax. 81-3-5488-5088
n Osaka Office
Namba Tujimoto Nissei Bldg, 4F
1-13-17, Namba Naka, Naniwa-ku,
Osaka City, Osaka, 556-0011
Tel. +81-6-6633-3690 Fax. +81-6-6633-3691
n U.S.A. Office
YAMAHA Systems Technology.
100 Century Center Count, San Jose, CA 95112
Tel. 1-408-467-2300 Fax. 1-408-437-8791
YAMAHA CORPORATION