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	effect list
most of the effect numbers are from ProTracker/FastTracker 2.
however, effects are continuous, which means you only need to type it once and then stop it with an effect value of 00.
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00xy: arpeggio. after using this effect the channel will rapidly switch betweennote,note+xandnote+y.
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01xx: slide up.
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02xx: slide down.
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03xx: note portamento.- a note must be present for this effect to work.
 
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04xy: vibrato.xis the speed, whileyis the depth.- maximum vibrato depth is ±1 semitone.
 
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08xy: set panning.xis the left channel andyis the right one.- not all systems support this effect.
 
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09xx: set speed 1.
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0Axy: volume slide.- if xis 0 then this is a slide down.
- if yis 0 then this is a slide up.
 
- if 
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0Bxx: jump to pattern.
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0Cxx: retrigger note everyxxticks.- this effect is not continuous.
 
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0Dxx: jump to next pattern.
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0Fxx: set speed 2.
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Cxxx: change song Hz.- xxxmay be from- 000to- 3ff.
 
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E0xx: set arpeggio tick.- this sets the number of ticks between arpeggio values.
 
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E1xy: note slide up.xis the speed, whileyis how many semitones to slide up.
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E2xy: note slide down.xis the speed, whileyis how many semitones to slide down.
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E3xx: set vibrato direction.xxmay be one of the following:- 00: up and down.
- 01: up only.
- 02: down only.
 
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E4xx: set vibrato range in 1/16th of a semitone.
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E5xx: set pitch.80is 0 cents.- range is ±1 semitone.
 
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EAxx: toggle legato.
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EBxx: set sample bank.- does not apply on Amiga.
 
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ECxx: note off afterxxticks.
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EDxx: delay note byxxticks.
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EExx: send external command.- currently not used, but this eventually will allow you to do special things after I add VGM export.
 
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EFxx: add or subtract global pitch.- this effect is rather weird. use with caution.
- 80is center.
 
- 
FFxx: end of song/stop playback.
additionally each system has its own effects. click here for more details.
