Tell us your macOS version, your audio device, the file format, and what the signal path showed when it went wrong. That is usually enough to reproduce it.
Purchases and refunds
Billing runs through the Mac App Store, so refunds are handled by Apple via Report a Problem. If something is broken rather than just disappointing, write to us first.
Press
Screenshots, icons and a short product description are in the press kit. For interviews or review copies, use the form and pick Press.