AJ'S FRET HOUSE

Free Online Music Practice Studio

Play songs instantly, get fast BPM/key analysis, slow down, transpose, loop difficult sections, record yourself, check pitch and export your practice audio.

Browser-first processing
Ready — choose a song to begin.
01

Upload

Drop your song here MP3, WAV, M4A, AAC, OGG, FLAC, MP4 or WebM
02

Player

Space = Play/Pause
00:00 00:00
03

BPM & Key

Detected BPM Upload a song to analyze
Detected Key Browser analysis
04

Pitch & Tempo

100%
0 cents

Tempo and pitch are processed independently using SoundTouchJS rather than simply changing playback speed.

05

Loop Practice

A — Loop Start 00:00
B — Loop End 00:00
06

Recorder

Mic permission only when recording
00:00
07

Live Pitch Checker / Tuner

0 Hz
Microphone is off
Guitar: E · A · D · G · B · E
08

Metronome

120
09

Trim & Export

In-browser export is rendered in real time so the processed audio can be captured as a genuine WAV. Very long exports can take approximately as long as the processed audio itself.

10

AI Audio Splitter / Stem Separator

Server processing required
AI source separation is not an EQ trick. This section is wired for a genuine Demucs backend. Your audio may be uploaded temporarily for AI processing.
Privacy: Playback, basic editing, BPM/key estimation, recording and tuner processing stay in the browser. Stem separation is the exception when a server is configured.