The Practice Player is an all-in-one tool for musicians who want to deeply study audio. Load any audio file and you can set loop points, slow down or speed up playback, and shift the pitch — all in real time inside your browser. No files are uploaded to a server. Processing happens entirely on your device.

A-B Loop

Press the A button to mark the start of a loop, then press B to mark the end. Once both are set, enable looping with the repeat button and playback will jump back to A every time it reaches B. This is ideal for drilling a difficult passage, transcribing solos, or memorizing a section. You can adjust the loop region at any time by pressing A or B again.

Speed Control

Drag the Speed slider to change the playback rate from 0.25× (quarter speed) to 2.0× (double speed) without affecting pitch. Slowing down lets you catch fast runs or ornaments that are hard to hear at full speed. This uses the SoundTouch algorithm, which preserves natural timbre even at extreme speeds.

Pitch Shift

The Pitch slider shifts the key up or down by up to 12 semitones (one octave) in either direction, without changing the playback speed. Shift the pitch down to play along with a song in a lower key, or up to practice in a higher key. Use it to match a track to the tuning of your instrument when a capo or retuning is not practical.

Tips

Combine slow speed with a tight A-B loop to isolate and repeat a single phrase until it is solid. Once you can play it cleanly at 50%, gradually raise the speed back to 100%. Use pitch shift together with speed reduction to make sure your ears adjust to the right notes even at a slow tempo.