Effect Axy

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Axy is a volume slide (or fade) effect -- it ramps the channel volume up or down at a specified rate. It can be used on any channel except Triangle and DPCM.

A0x = slide down (fade out). Ax0 = slide up (fade in). A larger value will result in a faster slide. A00 will stop the effect.

Amongst other things, this effect is useful for creating hi-hats on the noise channel. It can also be combined with other volume effects such as 7xy.

Note that when issuing an A00 command, the channel volume remains at whatever level it was last at and may need to be manually respecified on or before the next note played.

Examples

C-4 00 F ---
--- -- - ---
--- -- - A01
--- -- - ---
--- -- - ---
--- -- - A00

C-4 is note, 00 is instrument number, F is volume. Volume slide down starts from line with Axx effect and will continue until A00.

C-4 00 F A0F
--- -- - ---
D-4 00 - ---
--- -- - ---
C-4 00 F ---
--- -- - ---

C-4 and D-4 are notes, 00 is instrument number, F is volume. Only the two C-4 notes are played at full volume; D-4 picks up where the volume is at the end of the first C-4 and continues it.

F-3 00 F A06
--- -- - A0A
G-3 00 F A06
--- -- - A0A
A-3 00 F A06
--- -- - A0A

F-3, G-3 and A-3 are notes, 00 is instrument number, F is volume. Axy commands can be mixed to create complex fading instruments.

D-3 00 F A01 744
--- -- - --- ---
--- -- - --- 754
--- -- - --- ---
--- -- - --- 764
--- -- - --- ---

D-3 is note, 00 is instrument number, F is volume.


Effect list
0xy - arpeggio 1xx, 2xx - pitch slides 3xx - portamento 4xy - vibrato
7xy - tremolo Axy - volume slide Bxx - jump to frame Cxx - stop
Dxx - skip frame Exx - volume Fxx - speed and tempo Gxx - note delay
Hxy, Ixy - hardware sweep Hxx - FDS modulation depth Ixx, Jxx - FDS modulation speed Pxx - fine pitch
Qxy, Rxy - note slide Sxx - mute delay Vxx - duty/noise/wave mode Wxx - DPCM sample speed
Xxx - DPCM sample retrigger Yxx - DPCM sample offset Zxx - DPCM delta counter