Song Mixer

Play your songs with smooth mixes between them: beats matched, bass swapped and timed for you, right in your browser.

Drop songs to add them

{{ index ? 'B' : 'A' }} {{ roleText(deck) }} No steady beat {{ formatBpm(deck.track.analysis.bpm) }} BPM {{ deck.trimDb > 0 ? '+' : '−' }}{{ Math.abs(deck.trimDb).toFixed(1) }} dB

{{ deck.track ? (deck.track.artist || ' ') : (index ? 'The next song loads here' : 'Add songs, then press play') }}

{{ formatTime(deck.position) }} −{{ formatTime(Math.max(0, deck.track.duration - deck.position)) }}

Auto mix

Playlist

{{ tracks.length }} {{ tracks.length === 1 ? 'song' : 'songs' }} · {{ formatTime(totalTime) }}

Sort by Show

{{ filter === 'beat' ? 'None of the songs has a steady beat yet.' : 'Every song has a steady beat, so they can all be beat-matched.' }}

Your songs from last time are here. Your browser needs your OK before Song Mixer can play {{ lockedCount === 1 ? 'it' : 'them' }} again.

Drop songs here or add them above. Each one is checked for its tempo and beats, right here in your browser.

{{ track.title }} {{ track.artist || track.fileName }} – {{ formatBpm(track.analysis.bpm) }} Can’t play Not found {{ track.duration ? formatTime(track.duration) : '' }}

Mixing

Mix length

Tempo can change by

For a bigger gap, the playing song eases toward the next one’s tempo first, so each moves only half way. Songs further apart than this are faded instead of beat-matched.

Key lock Keeps each song’s pitch when its tempo changes. Off, it sounds like a turntable: faster is higher. Applies to songs started from now on.

Come in where the next song’s beat is full Skips a quiet or beatless intro to where the beat comes in, or to the start of a new part.

Ease back to each song’s own tempo after a mix

Echo out on fades

Start the playlist again at the end

Next time

Remember my songs Song Mixer remembers where they are on your computer, so nothing is copied. After a reload, one click opens them again. The playlist and each song’s beats come back after a reload.

Keep copies in this browser {{ supportsHandles ? 'For songs this browser can’t remember the place of.' : 'This browser can’t remember where files are, so it keeps its own copies.' }} They take as much space as the songs.

{{ unsavedCount === 1 ? '1 song' : unsavedCount + ' songs' }} won’t be here after a reload{{ settings.keepCopies ? '' : ' unless copies are kept' }}.

Keys

Space: Play or pause
N: Mix into the next song
⏯ ⏭: The keyboard’s media keys work too: play/pause, and next mixes into the next song

Songs are brought to the same loudness as they play. Your songs stay on your computer; nothing is uploaded.