2.5 KiB
2.5 KiB
Ensoniq ES5506 (OTTO)
sample-based synthesis chip used in a bunch of Taito arcade machines and PC sound cards like Soundscape Elite. a variant of it was the heart of the well-known Gravis Ultrasound.
it has a whopping 32 channels of 16-bit PCM and:
- real time digital filters
- linear interpolation
- loop start and stop positions for each voice (bidirectional and reverse looping)
- internal volume multiplication and stereo panning
- hardware support for short envelopes
effects
10xx: set waveform.11xx: set filter mode. values are0through3.120x: set pause (bit 0). pauses the sample until the bit is unset; it will then resume where it left off.14xx: set filter coefficient K1 low byte.15xx: set filter coefficient K1 high byte.16xx: set filter coefficient K2 low byte.17xx: set filter coefficient K2 high byte.18xx: set filter coefficient K1 slide up.19xx: set filter coefficient K1 slide down.1Axx: set filter coefficient K2 slide up.1Bxx: set filter coefficient K2 slide down.20xx: set envelope count.22xx: set envelope left volume ramp.23xx: set envelope right volume ramp.24xx: set envelope filter coefficient K1 ramp.25xx: set envelope filter coefficient K1 ramp (slower).26xx: set envelope filter coefficient K2 ramp.27xx: set envelope filter coefficient K2 ramp (slower).3xxx: set coarse filter coefficient K1.4xxx: set coarse filter coefficient K2.81xx: set panning (left channel).82xx: set panning (right channel).88xx: set panning (rear channels).89xx: set panning (rear left channel).8Axx: set panning (rear right channel).9xxx: set sample offset.- resets sample position to
xxx * 0x100.
- resets sample position to
DFxx: set sample playback direction.
info
this chip uses the ES5506 instrument editor.
chip config
the following options are available in the Chip Manager window:
- Initial channel limit: sets how many channels are available for use. if reduced, output rate increases.
- Volume scale: allows you to lower the overall volume to prevent clipping/distortion when using too many channels.
- Amiga channel volumes: makes volume linear, from 0 to 64 (40 in hex). used in S3M, XM and IT import.
- Amiga-like pitch: pretends to be an Amiga, with periodic slides. used in S3M, XM and IT import (the latter two when linear slides are disabled).
- only effective when pitch linearity is None.