JG, thanks for writing! What you are describing is something we hear from time to time. Sometimes it is fixed by re-flashing the Quaverato software. Apparently the software sometimes becomes corrupted during handling of the microcontroller. Re-flashing with the latest software is super-easy with the free ZDL Updater App for PC. You will also need a not-free piece of hardware called a USB-Tiny Programmer. Any Arduino nerd you know has one of these. If there’s an electronics shop or maker space in your area, they will have boxes of them. Or you can get one from us. Re-flashing the software often fixes these issues, but I will ask the Quaverato designer, Brach, to weigh in when he is back in the Lab on Wednesday.
Glen