Fun to experiment with
Developer quick response to support and fast fix! Excellent sound toy for experimental work.
Response from developer
Thanks for flagging this: you found a real bug. The playhead screen had no way to close it on some phones, so you were stuck force-quitting to get out. It is fixed in the update that's live now (version 1.3.2). Sorry for the hassle, and thanks for taking the time to report it.