CountIn CountInCountIn is a browser-based tool for musicians who perform to backing tracks. Upload a track and it detects the tempo and downbeat, then adds a count-in (hi-hat or sticks) that lands exactly on beat one, so you come in cleanly instead of guessing where the song starts. It can also change the key in semitones without touching the tempo, then export a stage-ready MP3 or WAV. Everything runs in the browser — no install, no account. BPM detection, the count-in and the full preview are free; exporting the finished file is a one-time $9. Read More