b2b and Mixed In Key.
Mixed In Key reads the key, BPM and energy of your tracks, and b2b doesn't try to. If you have both, b2b runs Mixed In Key on every track you buy.
Free to start · Plus $5.99 a month or $49.99 a year · 14 days of Plus free, no card
| Feature | b2b | Mixed In Key |
|---|---|---|
| Reading your tracks | ||
| Key and BPM | Reads them from your library and the store | Analyzes each file and writes them to it |
| Energy | Your own rating, or Mixed In Key's | Analyzes each file |
| Cue points | No | Up to eight automatic cues per track |
| Mashup and mixout ideas | No | In Pro |
| Stems, pitch shifting and loops | No | In Pro |
| Around your tracks | ||
| Buying tracks | Fills Beatport and Bandcamp carts in one click | Not listed |
| New downloads | Prepped, filed and added to your library, on Plus | Not listed |
| Tag tracks | Plays each track from the drop; a key or your voice tags it | Not listed |
| Check for bad rips | Gig Check flags rips and drifting beat grids | Not listed |
| Play a playlist as a mix | AI Mix plays it as one continuous mix, on Plus | Not listed |
| What it takes | ||
| Computers | Mac with Apple silicon, or Windows 10 or 11 | Mac or Windows |
| Price | Free, or Plus at $5.99 a month or $49.99 a year | One time: $58, or $99 for Pro (Nov 1, 2026) |
From Mixed In Key's own site, read November 1, 2026. Not listed means we didn't find it there.
Choose b2b if
- You want your carts filled and your downloads filed
- You want to tag as you listen
- You want to catch bad rips before a gig
- You want a playlist to play as a mix
Choose Mixed In Key if
- You want key, BPM and energy analyzed for you
- You want cue points placed automatically
- You want mashup ideas or stems
- You want to pay once
Downloads land ready to go.
Every track you buy is prepped and added to your library on its own. If you have Mixed In Key, b2b runs it on each one.
Questions
Do I need Mixed In Key to use b2b?
No. Without it, b2b takes the key and BPM from the store or the file's tags.
How do they work together?
When you buy a track, b2b hands its own copy to Mixed In Key, waits for the result and carries it on into your library. Your download stays as it is.
Does b2b upload my music?
No. Your music files stay in your own cloud storage and on your devices. b2b's servers never receive, store or relay them. The only audio that reaches them is voice you dictate, which is transcribed and discarded.