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Bandmixr is an automatic online mixing and mastering platform built for musicians and bands. Upload your raw stems, choose your genre, and get a professional-sounding mix, all from your browser. Already have your own mix? You can upload it directly for mastering only. Bandmixr is expanding its toolkit with additional tools designed for musicians, like the Rehearsal Cutter.

Bandmixr is built for anyone who records music and wants a professional-sounding mix or master without the cost or complexity of a traditional studio. That includes bands recording in rehearsal rooms or home studios, singer-songwriters tracking at home, and bedroom producers working with stems. No audio engineering knowledge required. Just upload your stems and Bandmixr handles the rest.

For mixing and mastering, we support WAV, FLAC, MP3, and AIFF. The Rehearsal Cutter accepts WAV, FLAC, MP3, MP4, and M4A. Lossless formats like WAV or FLAC are recommended for the best results.

Individual stems can be up to 150 MB each and mix uploads for mastering up to 180 MB. Stem duration is limited to 8 minutes on the Free plan and 13 minutes on paid plans. Free projects support up to 16 stems, while Creator and Pro plans support up to 24 stems with a total storage limit of 5 GB. The Rehearsal Cutter has no file size or duration limit since it processes everything locally in your browser.

Bandmixr currently supports Rock/Indie, Pop, Acoustic, Punk, Metal, Jazz, Blues, Funk/Soul, Reggae/Dub, Hip Hop, and Electronic. If your genre is not listed, choose "General / Not sure" and Bandmixr will apply a balanced, genre-neutral mix.

Upload your individual stems (drums, bass, guitar, vocals, etc.), pick a genre, and Bandmixr takes it from there. Every stem is analyzed individually, and a custom mix plan is built based on what each track needs and how it fits with the rest. Frequency clashes between instruments are resolved automatically so nothing fights for the same space. The result is a balanced, polished mix shaped by your chosen genre.

Yes. After the initial draft mix is generated, you can review and adjust individual stem levels, reverb, and panning preferences before exporting the final mix.

After your final mix is created, you can apply mastering with one click. Choose between three presets: Streaming (optimized for platforms like Spotify and Apple Music), Standard (a balanced middle ground), or Loud (maximum punch and density). You can also upload a reference track to guide the mastering toward a sound you like. If you already have your own mix, you can skip the mixing step entirely and upload it straight to Bandmixr for mastering only.

Yes. Go to your project, open the Final Mixes tab, and click "Upload Mix" to upload your own stereo mix. Once uploaded, click the Master button on that mix to choose a mastering preset and optionally attach a reference track. Your mix will be mastered the same way as an auto-generated one.

Final mixes are exported as 44.1kHz/24-bit WAV. You can also download as FLAC or MP3.

Yes. All stems must start at the same point and be the same length so they stay in sync during mixing. When exporting from your DAW, make sure every stem starts at bar one and runs to the end of the song.

Free projects support up to 16 stems, while Creator and Pro plans support up to 24 stems. Most projects have 4 to 16 stems, but the system handles larger track counts just fine.

Cut individual songs out of long rehearsal or jam session recordings. Works with multitrack stems and simple stereo or phone recordings. Everything runs locally: Your files never leave your device.

Yes. You can drop a single stereo file, like a phone recording or a room mic capture, or multiple individual stems (e.g., separate tracks for drums, bass, guitar). When using multitrack files, the tool analyzes them together and silence is only detected when ALL tracks are quiet simultaneously, so it won't cut during a drum solo over a quiet guitar part.

Absolutely. After analysis, you see every detected segment on an energy timeline. You can rename songs, change classifications (keep, review, or discard), and the silence detection thresholds are fully adjustable.

Click "Download All" and all your songs are packaged into a single ZIP file organized by song name, with all stems inside each folder. The download happens directly from your browser.

No. The Rehearsal Cutter is only available on desktop and laptop computers. Processing speed depends on your hardware since everything runs locally in your browser.

No. Since everything runs locally in your browser, there is no file size or duration limit. You can process hours of rehearsal or jam session recordings without any restrictions. WAV files are sliced instantly without re-encoding.

No. The Rehearsal Cutter processes everything locally in your browser using WebAssembly. Your audio files never leave your device and no data is sent to any server.

You can delete your account from the Account page. This permanently removes all your data, projects, and uploaded files. This action cannot be undone.

You do 100%, always. Bandmixr claims zero rights to your stems, mixes, or masters. There is no licensing, no usage clause, and no transfer of ownership. Your music is your intellectual property, and using our tools does not change that in any way. We never share, sell, or access your files for any purpose other than processing your mix. When you delete a file, it is permanently removed from our servers.