How to use Count-In

Open a song, check the orange “1”, pick a count-in and save. Everything else is optional; this page walks through it.

First downbeat and tempo

The orange “1” marker sits on the first downbeat. The count-in ends right before it.
If the detector got it wrong, drag the marker. It snaps to the detected beats; ⌥ turns snapping off.
The arrows next to the time move the “1” one beat earlier or later.
Set the tempo with − and +, by typing a number, or with Tap: the song plays and you tap Space.
×2 and ÷2 help when the detector counted twice as fast or slow.
The orange “The detector found another “1”” banner shows up when it is unsure. Click it to take the other candidate.

The Tap button in the Tempo card opens the “Tempo by ear” window, and the song starts playing just before the “1”.
Tap Space along with the beat, at least three times. The taps are timed by the computer clock, not the audio buffer, so the tempo is right to a tenth of a BPM.
Stop: two beats after your last tap the song goes on with a click at the tapped tempo and phase, so you hear at once whether it matches the song.
If it drifts, just tap again: a gap of more than two seconds starts over.
Apply puts the tapped tempo into the Tempo card; Cancel or closing the window keeps the old one. Either way the music stops.

“Even” clicks on every beat, “Build-up” starts sparse and gets denser, MIDI takes the pattern from your file.
The count-in lasts one or two bars; the meter is 4/4, 3/4 or 6/8.
The count-in volume does not depend on the song's level.

Space starts and stops playback. Without a playhead it starts from the count-in.
A click on the waveform sets the playhead, and playback starts from it. A double-click plays at once from the bar before that point.
The ◀◀ and ▶▶ buttons and the ← and → keys jump to the previous and next pause and play from the bar before it. Home goes back to the count-in.
The overview under the waveform shows the whole song, the pauses and the visible part. Drag the frame to scroll; a click outside it moves the view there.
The mouse wheel zooms; dragging and sideways trackpad scrolling pan the waveform.
The playback volume in the window header never reaches the saved file.

A pause is a run of bars that are quiet once the removed instruments are gone. A hi-hat plays on every beat in it. The stick count-in plays only at the start of the song.
With “Fill pauses with hi-hat” on, the app finds pauses by itself in the track without the parts you turned down. “Silence threshold” gets fitted to it automatically; move it and the pauses rebuild. Turning a part back on keeps the pauses.
Pause edges drag along the bars. The current pause is brighter.
A new pause comes from the + button in “Pause fill” on the bar under the playhead, from selecting bars with ⇧ or from dragging along the time ruler.
The cross in its header, the − button in “Pause fill” or a right-click removes a pause.
A click on a pause header opens its own tempo and meter.

The guitar, vocals, bass, drums and piano sliders turn a part down or remove it. The speaker button mutes a part in one click.
The song separates into parts in the background after it opens. Anything that needs the parts starts by itself once they are ready.
Levels can change while the song plays.
The floppy disk in the card header saves the current settings as defaults, the arrow next to it restores them.

“Save” writes the track with the count-in, the hi-hat in pauses and the chosen part levels.
By default the format matches the source. MP3 320 kbps, FLAC, ALAC and WAV are available; tags and cover art carry over.
“Trim leading silence” removes the empty space before the count-in.
The output folder and grouping by artist, year and album are set in Settings.

Analysis and separation need models, about 780 MB. The app downloads them once on first launch.
An assets folder next to the app works too, so the models can travel with it on a flash drive.