Alpha v0.17
 * 4 waveforms
 * Wave modulation : PWN, pitch etc
 * 8 sound channels
 * 8 resonant low pass filters (1 per channel)
 * Supoort for ENVELOPE and SOUND commands
 * A digital delay effect
 * Sample playback via WAV files

Beta 1 v0.22
* Support for modulating samples via the ENVELOPE command
* Support for sample looping.
* An ASM veneer for the shared sound call.
* Crude bell override so that samples may be played for the system bell.
* A master volume control.
* Increased channels to 16.
* Various bug fixes and code prettifying. Notably to ADSR so that decay now works and that the ADSR works more correctly with different volume levels.
* SWIs based on allocated SWI range. Although these have not yet been tested.


Beta 2 v0.23
* Improved examples

Beta 3 v0.26
* Stereo sound support in SOUND command including 16 stereo positions
* *RPAN command with 256 stereo positions
