Prepare every track for the next set

From tempo and format to gain, key, and source quality, SirenMix keeps practical DJ preparation in one place.

Tools for every step of track preparation

Convert MP3, WAV, FLAC, OGG, and OPUS files directly in your browser.

Adjust one track at a time with automatic BPM detection, instant target-speed preview, and export.

Detect the BPM of multiple audio files directly in your browser.

Detect the musical key of multiple audio files directly in your browser.

Adjust one track at a time with original and adjusted waveforms, live sample-peak values, and sample-clipping-safe export.

Transpose songs by semitones without changing tempo, with Camelot guidance for the resulting key.

View a full-track spectrogram, find the high-frequency cutoff, and compare it with the file’s declared quality.

Audio processing stays in your browser. Your tracks are never uploaded.

Use the Camelot wheel to compare all 24 keys, common compatible moves, and Open Key notation.