Music Slow Downer

Music Slow Downer is a practice tool for musicians and music students: slow a track down without changing its pitch, change its key, and loop the hard parts as many times as you need. SPEED AND PITCH ARE INDEPENDENT • Slow down or speed up between 20 % and 200 %; the tuning stays the same. • Transpose by up to ±12 semitones; the tempo does not change. • Hold a slider knob and drag your finger down: precision goes all the way to 0.01. • Left/right channel mix lets you bring an instrument forward or push it back. A–B LOOP • The |◀ and ▶| buttons set the loop start/end at the current position; only that section plays. • The waveform timeline spans exactly the loop range. • Name and save loops, step through them, export/import them as JSON. • Pause between repeats and "stop after N repeats" options. LIBRARY • Add audio and video from the Files app or the share sheet (mp3, m4a, wav, aiff, flac, mp4, mov). • Download from a direct file link. • Organize with folders; every track remembers its own speed, pitch and loops. • Videos slow down in sync with the audio; tap the preview to watch full screen. EXPORT • Save the track, or just the loop range, at the current speed/pitch as M4A or WAV and share it. TOOLS • Metronome (10–600 BPM, 10 sounds) runs alongside the player. • Tuner with letter or solfège note names and an adjustable A4 reference. PRIVACY • No account, no ads, no data collection. Your files never leave your device. Background playback and lock-screen controls are supported. Designed for iPhone and iPad.