Jammit, whose main interface resembles a mixing board, lets you isolate the musical parts you want to hear or learn.
The app provides a slow mode, phrase looping, and digital transcriptions to show you exactly how the music was played. It lets you rebalance the mix, isolate instruments, play along, and record your own part.
It will be available for guitar, bass, drums, keyboards, and vocals. The official release date us still unknown.