Sega Saturn Guide d'application
SEGA Confidential
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SEGA Confidential
TM
SEGA SATURN
Sound Tools Manual
Supplement
Doc. # ST-198-R1-121594
• SEGA SATURN Sound Tools Manual V1.27 11/15/94
• SATURN Sound Driver System Interface V3.02 12/1/94
• SATURN Sound Simulator Manual V2.10 11/15/94
© 1994-95 SEGA. All Rights Reserved.
SEGA Confidential
READER CORRECTION/COMMENT SHEET
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SEGA Confidential
REFERENCES
In translating/creating this document, certain technical words and/or phrases were interpreted
with the assistance of the technical literature listed below.
1. Dictionary of Science and Engineering, 350,000 words, 3rd Edition
Inter Press
Tokyo, Japan
1990
2. Computer Dictionary
Kyoritsu Publishing Co., LTD.
Tokyo, Japan
1978
3. IBM Dictionary of Computing
McGraw-Hill, Inc.
New York, New York
1994
SEGA Confidential
SEGA SATURN Sound Tools Manual Supplement 1
Contents
1 SEGA Custom Sound Processor (SCSP) ...................................................... 2
2 SEGA SATURN Sound Box (Model M) .......................................................... 3
3 Sound Development Tools and Library Provided by SEGA............................4
4 Functions of the Wave Editor ......................................................................... 5
5 Functions of the Tone Editor .......................................................................... 5
6 Functions of the DSP Linker .......................................................................... 6
7 List of MIDI Channel Messages Supported by Sound Driver Version 1.27 ....7
8 List of MIDI System Messages Supported by Sound Driver Version 1.27....10
9 Sound Driver CPU Execution Times ............................................................ 11
10 Explanation of the Rear Panel LEDs on the Sound Target Box ................... 11
11 Precautions for the DSP Linker Version 1.11 ............................................... 13
12 Precautions for the Sound Simulator ........................................................... 13
13 Precautions for the Tone Editor Version 1.13 and
Sound Driver Version 1.27 ........................................................................... 14
14 Precautions for the Wave Editor Version 1.13 .............................................. 15
15 Problems with Sound Playback Control ....................................................... 16
16 Recommended Third Party Software/Hardware Tools for Sound/Music
Development................................................................................................ 16
SEGA Confidential
2
1. SEGA Custom Sound Processor (SCSP)
1. Overview
· The clock speed of the SCSP chip is 22.58 MHz.
· The playback sampling frequency is 44.1 kHz.
· DMA is built in.
2. Generator
· PCM waveforms can be assigned individually to the 32 slots (oscillators)
separately. The standard AIFF format is used for the PCM waveform data, and
16-bit and 8-bit linear data are used. The ADPCM format is also supported. Each
of the slots has a completely independent LFO and envelope, and loop playback
of PCM waveforms can be set to any one of four modes: ONESHOT, FORWARD,
REVERSE and ALTERNATE.
·FM
One slot can be freely assigned as a carrier or a modulator, and a self-feedback
feature is also available. A waveform that can sufficiently stand up to
practical use can be output by the use of the self-feedback feature alone, in which
case the maximum FM output polyphony is 32 notes.
3. Built-in Sound DSP
· A sound DSP that can be programmed up to 128 steps is built in the SCSP. The 16
effects that are standard in the DSP library include Reverb, Early Reflection (ER),
Delay, Pitch Shift, Chorus, Flanger, Symphonic (type of Chorus), Surround (type of
Reverb), Voice Canceler, Auto Pan, Phaser, Distortion, Filter (high-pass, low-pass,
band-pass), Dynamic Filter, Parametric EQ, and Mixer. The addition of an expansion
library that includes 3D sound is currently under development.
SEGA Confidential
SEGA SATURN Sound Tools Manual Supplement 3
4. Dedicated CPU for Sound Control
· A 16-bit 11.3 MHz 68EC000 is used as the sound control CPU for the
SCSP. The 68EC000 is connected directly to the SCSP and operates independently
of the SH2. The interface also allows access of the SCSP from the SH2. During
access from the SH2, neither the SCSP nor 68000 CPU will stop. However, since
time-shared processing is used, the performance of the 68000 CPU will decrease
if there is frequent access from the SH2.
2. SEGA SATURN Sound Box (Model M)
The SEGA SATURN Sound Box (Model M) has two sets of MIDI IN, OUT and THRU
ports and a SCSI port, so it may be operated like a commercially available MIDI sound
module.
Also, beginning with version 1.21 of the sound driver, error codes can be output from
the MIDI OUT port, thus making it possible to detect data problems.
SEGA Confidential
4
3. Sound Development Tools and Library Provided by SEGA
· Sound Simulator
· Tone Editor
· Waveform Editor
· DSP Linker and DSP Effect Library
· Macintosh-based 68000 Assembler programming tool (SDSS)
· Macintosh-based 68000 debugging tool (SSBug)
· Invision sound library
· DSP Assembler for the SCSP (dAsm)
· Development board diagnostics program
· Sound driver
· Installation guide and ReadMe file explaining the use of the development board
diagnostics program.
· Sample demo tune
In addition to the resources above, manuals such as this one are provided by SEGA.
The SCSI firmware and the development board diagnostics program are supplied as
ROMs on the development board.
SEGA Confidential
SEGA SATURN Sound Tools Manual Supplement 5
4. Functions of the Wave Editor
· Supports 16-bit and 8-bit AIFF formats
· The following are editing functions that can be applied to waveforms.
Resample
Pitch Shift
Size Shift (time compression)
Scale (normalize)
Filter
Compressor
Noise Gate
Cross Fade
Fade In
Fade Out
5. Functions of the Tone Editor
· FM sound editing with a graphical user interface.
· Velocity curves can be set as desired.
· Supports hardware LFO from 0.17 to 172.3 Hz.
· Supports playback range from -8 octaves to +7 octaves.
· Graphical editing of a 5-parameter envelope.
· Effect send level, effect return level and pan/mixer settings for 16 channels.
· Ability to edit a maximum of up to 128 layers and 128 voices.
SEGA Confidential
6
6. Functions of the DSP Linker
· The following are the standard DSP effects:
Reverb
ER (Early Reflection)
Delay
Pitch Shift
Chorus
Flanger
Symphonic (type of chorus)
Surround (type of reverb)
Voice Canceler
Auto Pan
Phaser
Distortion
Filter (high-pass, low-pass, band-pass)
Dynamic Filter
Parametric EQ
Mixer (2 input, 3 input, 4 input, 8 input)
· Can patch input and output for up to 16 channels.
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6
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