AudioAlter Detects BPM But Not Key
AudioAlter's BPM Detector finds tempo but skips musical key entirely. BeatKey is a free alternative that gives you BPM, key, and Camelot code in one analysis. No account, no ads, no file size limit.
Try BeatKey FreeWhat is AudioAlter?
AudioAlter is an online audio editing suite with tools for noise reduction, pitch shifting, reverb, and tempo detection. Its BPM Detector is a free tool that estimates the tempo of an uploaded audio file.
The key limitation: AudioAlter's BPM Detector only returns tempo. It does not detect musical key, does not show Camelot codes, and does not support harmonic mixing workflows. DJs and producers who need both BPM and key have to use a second tool alongside AudioAlter. BeatKey replaces both in one analysis.
BeatKey vs AudioAlter: Feature Comparison
| Feature | BeatKey | AudioAlter BPM Detector |
|---|---|---|
| Price | Free (forever) | Free |
| Account required | No | No |
| BPM detection | Yes | Yes |
| Key detection | Yes | No |
| Camelot code output | Yes | No |
| Interactive Camelot Wheel | Yes | No |
| Chord detection | Yes (Chord Finder tool) | No |
| Delay calculator | Yes (Delay Calculator tool) | No |
| Scale finder | Yes (Scale Finder tool) | No |
| Files stay on device | Yes (browser processing) | No (uploads to server) |
| File size limit | None | 50MB max |
| Ads | No | Yes |
Who Should Switch to BeatKey
DJs who need BPM and key together
AudioAlter only gives you the BPM. To mix harmonically you also need the key and Camelot code. BeatKey gives you all three in one analysis: tempo, musical key, and the Camelot code you need for harmonic mixing.
Producers analyzing samples
When you are flipping a sample, BPM alone is not enough. You need the key to pitch your bassline and chords correctly. BeatKey detects both BPM and key so you can drop the sample into your project with confidence.
Privacy-conscious users
BeatKey processes audio entirely in your browser using WebAssembly. Your tracks never leave your device. AudioAlter uploads your file to a remote server for processing. For unreleased music, demos, or client tracks, BeatKey is the safer choice.
Large file analysis
AudioAlter caps uploads at 50MB. BeatKey has no server-side file size limit since processing happens locally in your browser. Large WAV files, uncompressed AIFF recordings, and high-quality audio are all supported.
Why You Need Key Detection Alongside BPM
Harmonic Mixing
Mixing two tracks in compatible keys sounds smooth. Mixing clashing keys sounds harsh. Camelot codes tell you instantly which tracks are compatible, but you need the key first.
Sample Flipping
When you flip a sample, your bassline and chords need to match the sample's key. Getting the key wrong means everything sounds out of tune, no matter how perfectly you match the BPM.
Track Organization
Organizing your track library by BPM and key lets you instantly find compatible tracks for a set or session. BPM alone only gives you half the picture.
BeatKey is More Than a BPM Detector
BeatKey is a suite of 6 free music tools, all integrated and working together.
Frequently Asked Questions
Does AudioAlter detect musical key?
No. AudioAlter's BPM detector only detects tempo (BPM) and does not detect musical key. If you need both BPM and key in one tool, BeatKey is a free alternative that detects key, BPM, and Camelot code from any audio file you upload. No account required.
Is there a free alternative to AudioAlter that finds both BPM and key?
Yes. BeatKey detects both BPM and musical key from any audio file, plus shows the Camelot code for harmonic mixing. It is completely free, requires no account, and processes audio in your browser so your files never leave your device. AudioAlter only detects BPM and does not show key or Camelot information.
Does BeatKey have a file size limit?
BeatKey processes audio entirely in your browser using WebAssembly, so there is no server-side file size limit. AudioAlter has a 50MB maximum file size for uploads. BeatKey works with any audio file your browser can load, including large WAV and AIFF files.
What is a Camelot code and why does it matter?
A Camelot code (like 8A or 4B) maps each musical key to a position on the Camelot Wheel, which DJs use to plan harmonic transitions. Tracks in adjacent Camelot positions mix smoothly without clashing. BeatKey shows the Camelot code alongside every key detection result and includes an interactive Camelot Wheel tool. AudioAlter does not show Camelot codes.
Get BPM and Key in One Analysis
Stop juggling two tools. BeatKey gives you tempo, musical key, and Camelot code together. Free, no account, no file size limit.
Analyze Your Track Free