Music Speed Changer review
A practice app that changes a song's tempo and key independently, with loops, track splitting and key and BPM detection.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Music Speed Changer, from Single Minded Productions, is a practice app for slowing down, speeding up and transposing recorded music. It changes tempo without changing pitch, and key without changing tempo (in semitones or cents), while the music plays. A–B loops repeat a tricky passage and can snap to the beat, markers bookmark spots in a song, lecture or audiobook, and the app detects each track's key and BPM and shows what they become after a change.
An on-device AI track splitter separates a song into up to six parts (vocals, drums, bass, piano, guitar and the rest), so a player can mute or solo a part to practice or transcribe it; the splitting model is a one-time download and then works offline. An 8-band equalizer and effects such as reverb and echo shape the sound, and changes can be saved as new audio files (MP3, FLAC or WAV on Android; AAC, lossless or WAV on Apple devices). Processing happens on the device, so songs are not uploaded.
The app is free to download on Android (7.1 or later), iPhone and iPad (iOS 17.6 or later) and Apple-silicon Macs (macOS 14.6 or later), with a web app for Windows, Mac, Linux and Chromebook and a Chrome extension for streaming sites. The core tools are free; Pro, a subscription or one-time purchase whose price the site does not list, removes ads and adds formant correction for natural-sounding vocals and the six-part split with guitar. It suits musicians, singers, dancers and students who practice with recorded audio rather than following a structured course.
Music Speed Changer pros and cons
- Where it wins
- Changes tempo and key independently, with A–B loops that snap to the beat
- An on-device AI track splitter separates vocals, drums, bass, piano and guitar
- Free core tools on Android, iPhone, iPad, Mac, a web app and a Chrome extension
- Where it doesn't
- A practice tool, not a lessons app: no curriculum or feedback on your playing
- Pro's price is not listed on the site; Pro removes ads and adds formant correction and the six-part split
- In the app, Spotify and YouTube songs cannot be used; the Chrome extension covers streaming sites
Music Speed Changer fact sheet, pricing and score →
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