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TM

nti
al3

deSCSP/DSP Effect Module
Specifications (Tentative)
Doc. # ST-69-121693

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9/3/93, Ver. 1.00

CoYAMAHA CORPORATIONSEGA

1.0 Introduction
2.0 Effect Modules Scheduled to Be Developed
Reverb(s)Early Reflection(s)Echo (Delay) (s)Pitch Shifter(s)ChorusFlangerSymphonicSurround
Voice Cancel
Auto Pan
PhaserDistortion
FilterParametric EQ

2233456677788899SEGA© Copyright 1993-1994 Sega. All rights reserved.

nti
al

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more space is needed. Thank you.
General Information:

PhonedeYour Name
Document number

ST-69-121693

Date

Document nameSCSP / DSP Effect Module Specifications

Corrections:
Correction

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pg. #GA

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Chpt.

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Questions/comments:

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Redwood City, CA 94065

ntial

1.0 Introduction
The SCSP/DSP Effect modules are function-specific software modules that users canlink together with the SCSP/DSP Linker software to create their own DSP microprograms.

Notes:

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1. Reverb(s)2. Early Reflection(s)3. Echo (Delay) (s)4. Pitch Shifter(s)5. Chorus
6. Flanger
7. Symphonic
8. Surround
9. Voice Cancel
10. Auto Pan
11. Phaser
12. Distortion
13. Filter
14. Parametric EQ

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2.0 Effect Modules Scheduled to Be DevelopedThe modules with (s) at the end of their names are scheduled to be released with subsets of theeffect family. For the modulation type modules (5, 6, 7, and 11), prototype effect subsets arescheduled to be created and tested. Whether or not the subsets will be released has not been
determined.

2.

The values indicated in the following specifications for number of steps and Delay buffer RAM
size are tentative and may be changed during the module development and evaluation stages.
The values enclosed in parentheses are the subset edition values for each effect subset module.

3.

The parameters type and the value ranges may be changed during the module development andevaluation stages.

SEGA

1.

2

Effect
Number of steps
Delay buffer RAM size

Comments:Value
Hall/Room/Vocal/Plate/others
0.1 to several 10's [ms]0 to 10
0.3 to several 10's [s]0 to 100%
0 to 100%

It is possible to partially compensate for the decreases in the number of steps andDelay buffer RAM size by adjusting the quality and reverb time of the effect.

Early Reflection(s)Remarks

Unavailable in the subset version.

The full version is stereo, and the subset version is mono. It is possible to partiallycompensate for decreases in number of steps and Delay buffer RAM size by adjusting
the quality of the Early Reflection sound.

SEGA

Comments:

Value
Hall/Random/Reverse/Spring/others
0.1 to 100[ms]0 to 100 to 10
0.1 to 10
0 to 100%
0 to 100%

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Initial Delay
Liveness
Diffusion
Room Size
Effect Level
Direct Level

Generates Reverb-type effects using early reflection.
100 (60)
13 [kwords]

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EffectNumber of steps
RAM size used for delay
Parameter
TypeRemarks

deParameter
Type
Initial Delay
Diffusion
Reverb Time
Effect Level
Direct Level

Generates reverb.
34 (28)15 [kwords]

ntialReverb(s)SCSP/DSP Effect Module Specifications

3Echo (Delay) (s)Parameter
Delay Time Left
Feed Back Left
Delay Time Right
Feed Back Right
Effect Level
Direct Level

Value
0.1 to 300 [ms]-99 to +99%
0.1 to 300 [ms]-99 to +99 [%]0 to 100%
0 to 100%

Remarks

The full version is stereo. The subset version is mono (simulated stereo) and features
simplified preprocessing.

SEGAConfi

deComments:

Generates echo sounds.
20 (10)26 (13) [kwords]

nti
alEffectNumber of steps
RAM size used for delay4Pitch Shifter (s)Value-12 to +12-99 to +99
0.1 to 300 [ms]-12 to +12Fine2-99 to +99

Delay2
Pitch30.1 to 300 [ms]-12 to +12

Fine3-99 to +99

Delay3Feedback
Pitch1 Level
Pitch2 Level
Pitch3 Level
Direct Level

0.1 to 300 [ms]-99 to 99 [%]0 to 100%
0 to 100%
0 to 100%
0 to 100%

Unavailable in the subset version.
Unavailable in the subset version.

The subset version generates only one pitch-shifted sound, and does not support
control over delay.

SEGACoComments:Remarks
Related to SCSP synthesizer settings.
Related to SCSP synthesizer settings.
Unavailable in the subset version.
Related to SCSP synthesizer settings.
Unavailable in the subset version.
Related to SCSP synthesizer settings.
Unavailable in the subset version.
Unavailable in the subset version.
Related to SCSP synthesizer settings.
Unavailable in the subset version.
Related to SCSP synthesizer settings.
Unavailable in the subset version.
Unavailable in the subset version.

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Parameter
Pitch1
Fine1
Delay1
Pitch2nti
alNumber of steps
RAM size used for delay

Generates three independently pitch-shifted sounds in addition to thedirect sound.
64 (32)15 (2) [kwords]

deEffect

SCSP/DSP Effect Module Specifications

5Chorus

Parameter
Rate
Amp Depth
Pitch Depth
Effect Level
Direct Level

Generates a chorus effect.
22
1 [kword]

Value
Arbitrary
0 to 100 [%]0 to 100 [%]0 to 100%
0 to 100%nti
alEffectNumber of steps
RAM size used for delay

Remarks
Related to SCSP synthesizer settings.

Value
Arbitrary
0.1 to 20 [ms]-99 to 99 [%]0 to 100 [%]0 to 100%
0 to 100%

Remarks
Related to SCSP synthesizer settings.

SEGACoParameter
Rate
Mod Delay
Feedback
Depth
Effect Level
Direct Level

Generates a flanging effect.
20
2 [kwords]

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EffectNumber of steps
RAM size used for delay

deFlanger6SymphonicParameter
Rate
Depth
Effect Level
Direct Level

Generates complex chorus-type pitch changes.
21
1 [kword]

Value
Arbitrary
0 to 100 [%]0 to 100%
0 to 100%nti
alEffectNumber of steps
RAM size used for delay

Remarks
Related to SCSP synthesizer settings.

EffectNumber of steps
RAM size used for delay

Value
0 to 100 to 100%
0 to 100%

Voice Cancel
EffectValueON/OFF

Remarks

SEGA

Parameter
EffectReduces the volume level of the vocal band that is normally positioned
in the center pan position.
36
0 [kword]Co

Number of steps
RAM size used for delay

Remarksnfi

Parameter
Liveness
Effect Level
Direct Level

Generates reverb.
23
15 [kwords]

deSurround

SCSP/DSP Effect Module Specifications

7

Effect
Number of steps
RAM size used for delay
Parameter
Rate
Depth

Moves sound image to the left/right.
4
0 [kword]

Value
Arbitrary
Arbitrary

Remarks
Can be set to any value by the sound CPU program.
Can be set to any value by the sound CPU program.

PhaserValue
Arbitrary
0 to 100 [%]0.1 to 20 [ms]0 to 100%
0 to 100%

Distortion

Value
0 to 100 [%]0 to 100 [%]SEGAParameter
Distortion
Output Level

Distorts the original sound.
200 [kwords]

8Remarks

CoEffectNumber of steps
RAM size used for delay

Remarks
Related to SCSP synthesizer settings.

nfiParameter
Rate
Depth
Mod Delay
Effect Level
Direct Level

Generates rotary speaker-type effect.
22
2 [kwords]

deEffectNumber of steps
RAM size used for delaynti
alAuto PanFilter

Parameter
TypeValue
Low Pass/HighPass/Band PassAbout 30 [Hz] to 15[KHz]

Frequency

This module can be used as a dynamic filter by dynamically rewriting the filter
coefficients with the sound CPU.

Parametric EQ
EffectNumber of steps
RAM size used for delay

Gain
QValueAbout 30 [Hz] to 15[KHz]-12 to +12 [dB]
Low/High

Remarks

This module can be used to produce wow wow effects by dynamically rewriting thefilter coefficients with the sound CPU.

SEGACoComments:

Boosts or cuts frequencies around the specified frequency.
50 [kword]nfi

Parameter
Frequency

Remarks

deComments:

Cuts the specified frequency band.
5
0 [kword]nti
alEffectNumber of steps
RAM size used for delay

SCSP/DSP Effect Module Specifications

9