“Music Speed Changer” lets you adjust playback speed and pitch independently, loop segments, detect BPM/key, and export audio. It originated as a musician’s practice tool that language learners have adopted for focused listening practice.

Intermediate/advanced learners who want to anal‑yze audio—songs, podcasts, lectures—at variable speeds and pitches for deep comprehension.

Install via iOS, Android, web or Chrome extension; import audio from local storage, cloud, or streaming, then grant audio permissions.

Typical use: load audio, slow to ~75% or desired rate, set A/B loops for tricky phrases, optionally pitch‑shift for clarity or tonal range, then export segments for offline review.

Use markers to quickly jump back, snap loops to beat grid, enable formant shift in voice recordings, clean UI by hiding unused controls for focused layout.