abSynth-FM
FM Synthesizer with step sequencer for Arduboy.
Mr. pcm1723's FM Synthesis engine in FMMelody is used.
Installation
You need Arduboy2 Library.
Usage
See this video.
#Data format of serial port communication
Syntax
A series of bytes in hexadecimal digits, separated with delimiters.
Delimiters are newline, return, or space.
All characters from '#' to the end of line are ignored. You can use '#' to include comments in the data.
Data starts with a header section followd by a series of sequence section.
Header section
| field | type | value |
|---|---|---|
| Signature | uint8_t[4] | 'abFM' |
| Version | uint8_t | 1 |
| Num of Sequences | uint8_t | 1 or 16 |
Sequence section
| field | type | value |
|---|---|---|
| Tempo | uint8_t | 56..240 |
| Transpose | int8_t | -2..+2 |
| Flags(reserved) | uint8_t | 128 |
| Synth parameters | uint8_t[5] | 0..255 |
| Notes | int8_t[16] | (below) |
| End mark | uint8_t | 128 |
Note data
| type | value | description |
|---|---|---|
| rest | -1 | no sound in the step |
| tie | -2 | continue previous note in the step |
| note | 48..84 | 48 for C4, 84 for C7 |
Example
One sequence
61 62 46 4D 01 01
3C 00 80 06 02 1B 01 02 3C 3C 43 43 45 45 43 FE 41 41 40 40 3E 3E 3C FE 80
16 sequences
61 62 46 4D 01 10
#Sequence 1-8
3C 00 80 06 02 1B 01 02 3C 3C 43 43 45 45 43 FE 41 41 40 40 3E 3E 3C FE 80
3C 00 80 05 02 1C 01 02 43 43 41 41 40 40 3E FE 43 43 41 41 40 40 3E FE 80
60 01 80 07 05 26 05 02 40 40 40 FE 40 40 40 FE 40 43 3C 3E 40 FE FF FF 80
60 01 80 07 05 26 05 02 41 41 41 41 41 40 40 40 40 3E 3E 40 3E FF 43 FE 80
60 01 80 07 05 26 05 02 41 41 41 41 41 40 40 40 43 43 41 3E 3C FF FF FF 80
4A FF 80 05 09 20 02 02 41 45 48 4C 41 45 47 4A 40 43 47 4A 40 43 45 48 80
C0 00 80 00 08 22 08 07 43 43 43 43 FF 46 46 46 46 FF 46 46 FF 46 46 46 80
94 00 80 00 08 22 08 07 3C 48 3C 45 3C 41 3C 43 3C 48 3C 4A 3C 47 3C 48 80
#Sequence 9-16
4C 00 80 07 03 20 01 02 34 39 3C 45 3B 3F 43 3F 42 FE 40 FE 3B FE 37 FE 80
7E 00 80 02 0C 00 07 07 3C 48 4B 4A 48 46 44 43 41 3F 3E 3F 3B 3C 3E 37 80
82 FF 80 04 01 10 01 02 3C 3C FF 3C 43 43 FF 43 45 FE 3C 45 41 FE 45 41 80
F0 00 80 04 01 10 01 02 3C 3E 40 42 44 46 48 4A 4C 4A 48 46 44 42 40 3E 80
78 FF 80 04 01 08 03 02 3E 3E 3E 3E 3E 3E 3E 3E 41 41 41 41 3C 3C 3C 40 80
73 FF 80 04 01 08 03 02 3C FE FE 3C FF 37 37 37 3C FE FE 3C FF FF 3C 3F 80
82 FF 80 02 0C 00 07 07 34 FF 45 FF 34 FF 45 34 FF 34 45 FF 34 FF 45 34 80
82 FF 80 02 0C 00 07 07 34 FF 45 FF 34 FF 45 34 FF 34 45 34 45 45 34 44 80