Asterion Sid Tracker cheat sheet

From Asterion Sid Tracker · print · built 2026-08-31

Reference

Cheat sheet#

Keys: F3 sound table · F6 middle screen (macro positions for 9x/Ax) · Track&Macros screen for tracks and the WAV/ARP tables · SHIFT+L load · SHIFT+S save · F8 directory.

Sound table (one instrument; instrument-tables):

field	meaning
`A/D`, `S/R`	attack/decay, sustain/release (adsr-envelope)
`WAV`	start position in the wave macro table
`ARP`	start position in the arpeggio macro table
`WAS`	wave / arpeggio execution speed (separate for the two)
`VDE`	vibrato delay
`VDS`	vibrato depth / speed (vibrato)
`PWM`	pulse starting speed
`PLM`	pulse lower / upper limit (pulse-width-modulation)
`SCP`	cutoff / pulse speed
`MCP`	multi-cutoff / multiple speed (its nibbles also decide how `Bx`/`Cx` behave)
`FCT`	filter starting cutoff
`FLM`	filter lower / upper limit (filter-programming)
`R/T`	resonance; filter type `1 2 4`; `8` = hard restart on/off (hard-restart)

Macro tables (WAV = control-register values, ARP = value added to the note; wavetable-programming, chord-arpeggio): ARP entries $00–$7F relative, $80–$DF absolute, $E0 "skydrive"; $FE ends the macro; $FF loops to the position in the next byte. The two tables run independently at their WAS speeds.

WAV → 30, ARP → 32	WAV → 20, ARP → 20
`30: 41 00`	`20: 41 00`
`31: 21 00`	`21: FE 0C`
`32: FE FE`	`22: 00 FF`
`$41` then `$21` at the same pitch	`23: 00 20` — an octave arpeggio (`00`, `0C` looping) under a single `$41`

Tracks (three columns; orderlist): $01–$7F pattern number · $80–$FE transpose the following pattern ("C0-middle"; Tognon reads 8C as +$0C) · $FF n loop to position n.

Pattern effects (one byte per step):

effect	meaning
`00`	none
`0x–1x`	instrument (restarts the ADSR values)
`2x`	`1` tie note · `2` sync · `4` ring modulation · `8` no pulse restart
`3x`	portamento to the note at speed `x` (pitch-slide-and-portamento)
`4x`	vibrato depth `x` at the `VDS` speed (`0` = `VDS` depth)
`5x` / `6x` / `7x` / `8x`	attack / decay / sustain / release
`9x`	run the wave macro from index `x` (`0` = normal)
`Ax`	run the arpeggio macro from index `x` (`0` = normal)
`Bx`	pulse: `0` = instrument LFO; `MCP` low nibble `0` → absolute pulse (`x` = pulse MSB), else `x` = second pulse value
`Cx`	cutoff: `0` = instrument LFO; `MCP` high nibble `0` → absolute cutoff (`x` = cutoff MSB), else `x` = second cutoff value
`Dx`	volume (default `F`) — fades
`Ex`	filter type `1` low · `2` band · `4` high · `8` no cutoff restart
`Fx`	tempo: `0` stop · `1–E` tempo · `F` end of pattern for all tracks