The ATTACK! drum machine firmware for the TB2 is coming along nicely. Here’s a look at the (incomplete) feature list.

Output 12bit, 22.5kHz, stereo

6 voices – load mono .wav files for each of the voices off SD card
independent control for each voice over
– pan
– volume*
– pitch*
– sample start*
– bit reduction*

sequencer
– 32-steps per sequence
– 8 sequences per bank
– 2 velocity levels** (standard & accent)
– flams** (time & decay)
– record automation for sample start & pitch**
– swing

* assignable to velocity
** independently adjustable for each voice