QuartetFileFormat

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Quartet File Formats

Header

Word Contents
0 Playback Frequency
1 Bar measurement note
2 Tempo multiplier
3 Time signature as 2 bytes
4 0
5 0
6 0
7 0


Instructions 12 bytes

Voices stored sequentially 1-2-3-4 with 1 finish marker per voice


Play Note

0 1 2 3 4 5 6 7 8 9 A B
00 "P" Length Frequency 00 00 00 00


Slide to note

0 1 2 3 4 5 6 7 8 9 A B
00 ‘S’ Length Frequency Step size


Rest

0 1 2 3 4 5 6 7 8 9 A B
00 "R" Length Frequency 00 00 00 00


Voice change

0 1 2 3 4 5 6 7 8 9 A B
00 ‘V’ 00 00 00 00 00 00 00 00 Table offset


Start loop

0 1 2 3 4 5 6 7 8 9 A B
00 ‘I’ 00 00 00 00 00 00 00 00 00 00


End loop

0 1 2 3 4 5 6 7 8 9 A B
00 ‘L’ 00 00 00 00 00 00 Times 00 00


End voice

0 1 2 3 4 5 6 7 8 9 A B
00 ‘F’ 00 00 00 00 00 00 00 00 00 00


Note lengths

The tempo is a number between 4 and 40. A semibreve is 16x this number. All other notes are multiples or fractions of this number.

Tx Note
24 Semibreve (dotted)
16 Semibreve
12 Minim (dotted)
8 Minim
6 Crotchet (dotted)
4 Crotchet
3 Quaver (dotted)
2 Quaver
1 Semiquaver

Frequencies

00050A28 C#
0004C1BC C
00047D66 B
00043CE2 A#
00040000 A
0003C686 G#
00039046 G
00035D12 F#
00032CBC F
0002FF22 E
0002D412 D#
0002AB70 D
00028514 C#
000260DE C
00023EB3 B
00021E71 A#
00020000 A
0001E343 G#
0001C823 G
0001AE89 F#
0001965E F
00017F91 E
00016A09 D#
000155B8 D
0001428A C#
0001306F C
00011F59 B
00010F38 A#
00010000 A
0000F1A1 G#
0000E411 G
0000D744 F#
0000CB2F F
0000BF68 E
0000B504 D#
0000AADC D
0000A145 C#
00009837 C
00008FAC B
0000879C A#
00008000 A
000078D0 G#
00007208 G
00006BA2 F#
00006597 F
0005FEF E
00005A82 D#
0000556E D
000050A2 C#
00004C1B C


.SET Voiceset file

Byte set frequency
Byte number of instruments + 1
20 * 7 byte blocks []NAME[]0
20 * 4 byte blocks offset to sample data

All samples in AVR format (See http://www.atari-forum.com/wiki/index.php/AVR)