Free Slowed and Reverb Generator

Slow down your songs and audio, adjust the pitch and add reverb. Preview and download free.

Choose audio or drop a file hereMP3, WAV & browser-supported audio · up to 60 MB / 10 minutes

Your audio stays on this device.

Speed90%Reverb amount20%

More options & details

Adjust pitch independently of speed

Classic mode: pitch follows speed.

Reverb characterReverb Tail (Decay)3.0 sReverb Warmth (Low-pass Cutoff)5.0 kHz

Decay is approximate and varies by engine.

Pitch change−1.82 st

Slowed source length—

Actual output duration is shown after processing.

Detected source BPM: —

An estimate appears after loading.

Target BPM (linked to speed)

Available when a source BPM is set.

Process

Presets are starting points. For lower memory use, try tracks under 6 minutes.

Troubleshooting info

Technical settings and errors only. No audio, filenames or artist tags. Nothing is automatically sent.

Engine credits & processing details

Signalsmith Stretch (MIT) handles independent pitch/tempo. Faust reverbs: Zita / Julius O. Smith, Dattorro / Jakob Zerbian, Freeverb / Romain Michon. MP3: lamejs 1.2.1 (LGPL). Full source and licences accompany the package.

Sample-peak protection may reduce gain; no true-peak limiter is included. Reverb is not noise removal. The full source duration is preserved; only quiet extra tail space is trimmed.

Local processing · no audio uploadBrowser processingEngine credits

Something not working? Report an issue. Include the tool name and copied troubleshooting info from More options & details. Please do not email your audio unless requested.