I owned Hedra for a few months and I used it only with synths: analog Bass Station 2 and digital Numa Compact 2X. Good monophonic tracking, good input&output options both mono and stereo. BUT the 3 pitches sound very digital and resulted pitches are not very defined compared with the dry original sound. Poly tracking is not good and I recommend to use with mono sounds. It has only one mix button that mixes alltogether 3 pitches with dry sound - not very flexible. Least but not last is TOO EXPENSIVE for the quality offered.