1.6.5 update
After the update, I’ve noticed 1. spontaneous resonance when connecting headphones to the 3.5mm jack. 2. noise, which a reboot helps.
3. After deleting all tracks, the sound remains exactly as it was on the tape; that is, the instrument plays, but the track doesn’t.
After the elevator down, some error codes popped up over the tape window. Unfortunately, I accidentally deleted the video with this bug.