following the conversation that developed on the Boomerang thread....just a rough sketch for comment, and keeping in mind that no one feature set is right for everybody.
(and forgetting for the moment that almost any delay unit can be pressed into looping usage) The features that every looper has 1) Record 2) Overdub 3) Erase The features that are very commonly desirable, but could be left out and still leave a satisfying piece of kit. Depends a lot on the amount of floor space unit will take up. 1) Reverse 2) Speed change 3) Stereo 4) Midi sync 5) Volume on loop(s) 6) Undo/Redo The features that get left out, but really shouldn't 1) Option of going straight into Overdub 2) Feedback control (at least during Overdub) 3) Seamlessly re-record a loop ...(so unsupported that it's importance is underestimated) 4) Multiply ( or 2 or more loops to allow you to achieve it)5) Stop/Start
The features that add usefulness, but not at the expense of essentials.1) Substitute/Replace 2) Insert
3) Configurable Quantise 4) Alternate Outputs ...well that's enough from me...what do you all think? andy