Build a focused offline audio player with efficient pitch and tempo processing, seamless parameter changes, large rehearsal-friendly controls, looping, and dependable metadata handling. The first version should favor stability and battery life over broad production features, with presets and a short guided introduction for new controls.

Multiple recent reviews across competing products report resource consumption, distorted output, confusing controls, and unreliable state handling. Continued daily use despite these problems indicates that the underlying practice workflow is durable and valuable.