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AUDIO INSTRUCTIONS
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///00-B5///
Plays a note, rest, or tie at a given pitch and beat

OPCODE / 14 = beat (see list below)
OPCODE % 14 = pitch, rest, or tie (see list below)

BEAT DURATIONS {ROM $042304-$042310}
*   224 ticks ()
*   220 ticks ()
*   216 ticks ()
0 = 192 ticks (whole note)
1 = 144 ticks (half note, dotted)
*   120 ticks ()
*   110 ticks ()
2 = 96 ticks (half note)
*   80 ticks (quarter note, double-dotted)
3 = 72 ticks (quarter note, dotted)
*   64 ticks (half note triplet, x3 = one whole note)
4 = 48 ticks (quarter note)
5 = 36 ticks (8th note dotted)
6 = 32 ticks (quarter note triplet, x3 = one half note)
*   26 ticks ()
7 = 24 ticks (8th note)
*   18 ticks (16th note dotted)
8 = 16 ticks (8th note triplet, x3 = one quarter note)
9 = 12 ticks (16th note)
*    9 ticks (32nd note dotted)
10 = 8 ticks (16th note triplet, x3 = one 8th note)
11 = 6 ticks (32nd note)
*    4 ticks (32nd note triplet, x3 = one 16th note)
12 = 3 ticks (64th note)
*    2 ticks (64th note triplet, x3 = one 32nd note)
*    1 tick (128th note triplet, x3 = one 64th note)
13 (see B6-C3)

*not in ROM, must use B6-C3 to set these beat lengths

PITCHES
0  ;A
1  ;A#
2  ;B
3  ;C
4  ;C#
5  ;D
6  ;D#
7  ;E
8  ;F
9  ;F#
10 ;G
11 ;G#
12 ;rest
13 ;tie

///B6-C3///
Same as 00-C2, but contains 1 parameter with a user-defined duration
B6-C3 xx    ;Duration = xx

///C4-FF///
C4          ;Octave up 1
C5          ;Octave down 1
C6 xx       ;Octave = xx
C7          ;Slur next note
C8 xx       ;Noise on, channel 0-7 = xx bits 0-7
C9          ;Noise on, all channels
CA          ;Noise off
CB          ;Frequency mode on
CC          ;Frequency mode off
CD xx       ;Play sound effect = xx
CE xx       ;Play embedded sound effect = xx
CF xx       ;Transpose 1/16 half steps = (+/-)xx
D0          ;Terminate script
D1 xx       ;Beat duration = xx *higher values = slower*
            ;10000 / xx = tempo in beats per minute
D2 xx       ;Audio memory $69 = xx, read by event command FD 96 and FD 97

///D3 xx       ;UNKNOWN *NEVER USED*

D4 xx       ;Repeat begin, count = xx
D5          ;Repeat end (reset octave)
D6          ;Repeat begin first ending
D7          ;Repeat infinitely, end repeat @ $D1
D8          ;ADSR reset
D9 xx       ;ADSR attack = xx
DA xx       ;ADSR decay = xx
DB xx       ;ADSR sustain = xx
DC xx       ;ADSR release = xx
DD xx       ;Sample length = xx (max 15)
DE xx       ;Sample = xx
DF xy       ;Noise transpose, pitch = y *0-15 raises, 31-16 lowers*, VOXCON = x
E0 xx       ;Sample fadeout = xx, max 31

///E1 xx       ;UNKNOWN *NEVER USED*

E2 xx       ;Volume = xx
E3 xx       ;Volume shift, amount = (+/-)xx
E4 xx yy    ;Volume slide, length = xx, volume = (+/-)yy *affects next note*
E5 xx yy    ;Portamento, length = xx, pitch = (+/-)yy *affects next note*
E6          ;Portamento looping *must follow $E5*
E7 xx       ;Speaker balance = xx
E8 xx yy    ;Pansweep duration = xx, end balance = yy
E9 xx yy    ;Pansweep loop duration = xx, reach = yy

///EA          ;UNKNOWN *NEVER USED, seems to raise one octave*
///EB          ;UNKNOWN *NEVER USED, seems to raise one octave*

EC xx       ;Transpose 1/4 pitch, from 0 = (+/-)xx *0 is reset*
ED xx       ;Transpose 1/4 pitch = (+/-)xx
EE          ;Percussion mode on
EF          ;Percussion mode off
F0 xx yy    ;Tremolo, amplitude = xx, wavelength = yy
F1 xx yy zz ;Vibrato, amplitude = xx, wavelength = yy, delay = zz
F2 xx       ;Beat duration change = (+/-)xx *triggered by event command $97*
F3          ;Vibrato off
F4 xx yy    ;Growling, roughness = xx, wavelength = yy

///F5          ;UNKNOWN *NEVER USED*

F6 xx       ;Portamento on, length = xx
F7          ;Growling off
F8          ;Dizzy effect on
F9          ;Dizzy effect off
FA          ;Reverb on
FB          ;Reverb off
FC xx yy zz ;Reverb, delay time = xx, decay ratio : 128 = yy, echo volume = zz

///FD          ;UNKNOWN *NEVER USED*
///FE          ;UNKNOWN *NEVER USED*
///FF          ;UNKNOWN *NEVER USED*

4/4 = 192 ticks
13/8 = 312 ticks