No waiting for your local audio file to decode, instant playback and instant audio speed and pitch adjustment. Completely free and no restrictions on this music speed controller. Modern material design UI and simple to use. Save an altered version of the whole track or only the captured loop section (excellent for making weird ringtones). Export your adjustments to a new audio file. Great for making Nightcore or Fast Music creations. Audio effects - apply effects such as echo, flanger and reverb, or reduce the vocal levels in the music for a karaoke effect.

Markers - bookmark positions in your audio. Analyze the audio to display the BPM and musical key of each track. Equalizer - 8-band graphic equalizer, and preamp and balance control. Waveform view showing contours of the audio for precise seeking. Playing queue - add folder or album to the playing queue and add/remove individual tracks. Decode the secret message or learn a passage backwards and forwards. Advanced looping feature - move the loop to the next or previous measure or set of measures with the touch of a button after the perfect loop is captured. Music looper - seamlessly loop audio sections and practice over and over (AB repeat play). Rate adjustment - change the pitch and tempo of the audio together. Utilizes professional quality time stretching and pitch shift engine. Time stretching - change audio speed from 15% to 500% of original speed (change BPM of music). Pitch shifting- change song pitch up or down 24 semi-tones, with fractional semi-tones allowed. Music Speed Changer is great for musicians practicing an instrument needing to slow down the tempo or practice in a different tuning, speeding up audio books for faster listening, making nightcore or just rocking out to your favorite song at 130%. You can also save the adjusted audio to an MP3 or WAV audio file for sharing with friends or listening in another player.

The app is a music looper as well - you can slow down song speed and loop sections of the music for easy practice. Alternatively, both speed and pitch may be adjusted together with a single control. Music Speed Changer allows you to change the speed of audio files on your device in real time without affecting the pitch (time stretch), or change the pitch without changing the speed (pitch shift).

Mp3 key changer app