How do I find the BPM of a song?

Upload your audio file to Toneify and we'll instantly detect the BPM (beats per minute) using advanced audio analysis. Supports MP3, WAV, FLAC, and more.

How do I find the key of a song?

Simply upload your song to Toneify and our analyzer will detect the musical key and scale (major or minor) automatically. Perfect for DJs and producers.

Is this BPM finder free?

Yes, Toneify is completely free to use. No signup required. Your files are processed in your browser and never uploaded to our servers.

What audio formats are supported?

Toneify supports MP3, WAV, FLAC, OGG, M4A, and video formats like MP4, WebM, and MOV. Maximum file size is 200MB.

Can I convert audio to MIDI?

Yes! Toneify includes a free audio to MIDI converter. After analyzing your song, you can view the detected notes in a piano roll and export them as a MIDI file.

What is the Camelot Wheel?

The Camelot Wheel is a tool used by DJs for harmonic mixing. It shows which musical keys are compatible for mixing. Toneify detects the key and provides the Camelot code.

How do I slow down a song to learn it?

Upload your song to our tempo changer, then move the slider below 100% (1x). Try 75% for moderate slowing or 50% for half speed. This is perfect for learning difficult guitar solos, piano pieces, or dance choreography.

Does changing the tempo affect the pitch?

Yes, our tempo changer adjusts both speed and pitch together (like playing a record faster or slower). If you want to change tempo without affecting pitch, you would need time-stretching software. For pitch-only changes, try our Pitch Shifter tool.

What is the maximum speed adjustment?

You can adjust speed from 0.5x (half speed) to 2x (double speed). This range covers most use cases for practice, dance preparation, and audio editing.

Why would I speed up a song?

Common reasons include: creating chipmunk/nightcore effects, matching BPM for DJ mixing, increasing workout intensity, or simply saving time when listening to podcasts or audiobooks.

Can I use this for music practice?

Slowing down music is one of the most effective ways to learn difficult passages. Musicians use this technique to master fast solos, dancers use it to learn choreography step by step, and language learners use it to catch lyrics.

Tempo Changer

Speed up or slow down audio

Drop audio file or click to browse

MP3, WAV, FLAC, OGG, M4A

How to Change the Speed of a Song

Upload Your Song

Drag and drop any audio file or click to browse. We support MP3, WAV, FLAC, OGG, and M4A formats.

Set Your Speed

Use the slider to adjust from 0.5x (half speed) to 2x (double speed). The detected BPM updates in real-time.

Download Result

Preview your tempo-adjusted audio, then download as a high-quality WAV file.

Note: This tool changes both speed and pitch together (like playing a vinyl record faster or slower). For changing pitch without affecting speed, use our Pitch Shifter.

Why Slow Down or Speed Up Music?

Learn Difficult Songs

Slow down fast guitar solos, piano runs, or drum fills to learn them note by note. Once you have mastered the part at slow speed, gradually increase tempo until you can play at full speed.

Dance Practice

Learning choreography is much easier at slower tempos. Reduce the speed to master complex moves, then build up to performance tempo as you gain confidence.

Transcription & Analysis

Musicians transcribing songs by ear benefit enormously from slowing down the audio. Catch every note and nuance that might be missed at full speed.

Workout & Running

Adjust song tempos to match your workout pace. Speed up songs for high-intensity intervals, or slow them down for cool-down stretches.

DJ Preparation

Match BPMs between tracks for smooth transitions. Use tempo adjustment to align songs before beatmatching in your DJ software.

Creative Effects

Create chipmunk effects by speeding up audio, or deep slowed-and-reverb style tracks by reducing speed. Popular for remixes and social media content.

Speed Settings Guide

Speed	BPM Change	Best For
0.5x (50%)	Half BPM	Learning very fast passages, detailed transcription
0.75x (75%)	-25% BPM	Practice mode, dance learning
1.0x (100%)	Original	Normal playback
1.25x (125%)	+25% BPM	High-energy workouts, quick review
1.5x (150%)	+50% BPM	Intense cardio, podcast speedup
2.0x (200%)	Double BPM	Chipmunk effects, rapid scanning

Frequently Asked Questions

How do I slow down a song for practice?

Upload your song and move the speed slider below 100%. Start at 75% for moderate slowing, or go down to 50% for very difficult passages. The detected BPM will update to show you the new tempo. This technique is used by musicians worldwide to master challenging pieces.

Why does the pitch change when I change speed?

This is how traditional speed adjustment works - like playing a vinyl record faster or slower. Speeding up raises the pitch, slowing down lowers it. If you want to change speed without affecting pitch (time-stretching), that requires more complex processing. For pitch changes without speed changes, try our Pitch Shifter.

What is the best speed for learning guitar solos?

Start at 50-60% speed for very fast solos, or 70-80% for moderately difficult passages. Practice until you can play cleanly at that speed, then increase by 5-10% increments. This gradual approach builds muscle memory without developing bad habits from rushing.

Can I use this for workout playlists?

Yes! Many runners and cyclists adjust song tempos to match their cadence. For running, aim for 150-180 BPM. Speed up slower songs or slow down faster ones to hit your target pace. Check out our Workout BPM Guide for recommended tempos by activity.

Is the audio quality affected?

Moderate speed changes (0.75x to 1.5x) maintain good audio quality. Extreme changes may introduce some artifacts. The output is saved as uncompressed WAV for maximum quality preservation.