Up Tempo: Pitch, Speed Changer

Remove vocals, split any song into stems, and change pitch or speed — all on your device, with no account and no upload. Up Tempo is a music practice tool and audio editor for singers, instrumentalists, transcribers, and producers. Slow down a solo to learn it. Drop a track's key to match your voice. Isolate the drums to practice along. Loop the hard bar until it clicks.

PRACTICE ANY SONG

• Slow down or speed up music in real time without changing pitch

• Transpose up or down by several octaves, with a preserve-formant option that keeps vocals natural

• Reverse playback for ear training and transcription

• Precise AB loop points on a pinch-to-zoom waveform

• Save loop points, effects, and settings per track and pick up where you left off

VOCAL REMOVER & STEM SEPARATION (Pro)

• Runs on your device — no account, no upload, works offline once models are installed

• Choose a fast 2-stem model (vocals / instrumental) or a higher-quality 4-stem model (vocals, drums, bass, other)

• Solo or mute individual stems in the mixer to build instant karaoke tracks or backing tracks

• Great for singers, guitarists, bassists, and drummers who want to play along with just the rhythm section

EDIT & MIX

• Trim music with millisecond precision; add fade in and fade out

• Multi-track editor: layer, align, and mix your own tracks into new arrangements

• Record vocals or instruments directly in the app (Pro)

• Waveform visualisation with pinch-to-zoom for accurate edits

STUDIO EFFECTS (Pro)

• Equaliser, reverb, delay, compressor, noise gate

• High-pass filter, low-pass filter, bass cut, panning, centre/sides isolation

• Creative effects: distortion (clip, saturate, crunch, overdrive), bit crusher, ring modulator

• Chain effects and toggle them on or off in real time

EXPORT & SHARE

• Export to MP3, M4A (AAC) at 128, 256 or 320 kbps, or FLAC lossless

• Edit title, artist, album, and album artist metadata before export

• Share exported tracks to any app

• Backup and restore your settings, markers, loop points

FREE vs PRO

Free includes pitch and tempo adjustment, looping (up to 6 markers), trim, fade, 2-track mixing, and export. Pro unlocks stem separation, vocal removal, recording, all studio effects, unlimited markers, and unlimited multi-track. One-time purchase, no subscription.

Up Tempo supports most common audio formats including MP3, M4A, AAC, WAV, FLAC and OGG.

Questions or feedback? Contact us at support@stonekick.com.

This software uses code of FFmpeg licensed under the LGPLv2.1 and its source can be downloaded below. https://stonekick.com/uptempo_ffmpeg.html http://ffmpeg.org http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html