TED instrument editor

TED instrument editor consists of these macros:

Volume: volume sequence.
- note: global! affects entire chip.
Arpeggio: pitch sequence.
Square/Noise: select whether square, noise or nothing will be output.
- noise only available on channel 2
- if square and noise are enabled, square takes precedence.
Pitch: fine pitch.
Phase Reset: trigger restart of waveform.
- note: global! triggers both channels...