- up to 16 independent audio tracks per song
  - a wide variety of synthesizers from traditional virtual analog and FM to Karplus-Strong
    and unique digital oscillators with parameter controls rarely seen in commercial synths
  - WAV file playback with looping, pitch shift, and configurable start/end points
  - many FX algorithms from digital filters and waveshapers to bitmasks and decimation
  - all synthesizer parameters can be set to unique values on a per-step basis
  - step sequencer with configurable step length, swing, highly accurate BPM, and tap tempo
  - probabilistic sequencing: the decision to retrigger to be based on a 0-100% probability
    rather than a boolean yes/no operation
  - song sequencing with 100 different loops per song, 1000 measures per song, and loop
    repeat capability
  - load and save of synthesizer presets between songs
  - record loops and songs to WAV
    
Some of the improvements over PSPSeq 2.11 include:

- fixed dc offset in humanize and delay cases
- synthezier presets
  - load to step, loop, all loops, save current step, preview preset data,
    multiple preset files per synth comp
- fixed wav save bug
- add exponential decay on freq to all synths
- 7Mbytes of memory for samples
- global configurable sensitivity on apad
- START always exits menu entirely
- fm feedback for BFM and FM synths with configurable routing
- shortcut to synth params from sequencer screen (triangle+L-trig+R-trig)
- per step pan, pan and vol moved to ENV as well as Stepedit Mode
- faster load/save and more compressed SEQs
- configurable stepping through sequencer with apad
- randomize parameters with ranged setting, start/end points for random values
- configurable colors
- namable loops, display next loop jump point
- better DADSR controls
- edit a subset of steps in a loop (latched mode)
- jump by 8 through seq load list (triangle+D-pad up/down)
- enhance clear track to clear from an arbitrary step
- enhance shift track to keep old hits for copy/paste functionality