Slowed and Reverb Generator

Slowed and reverb changes the presentation of an existing recording rather than writing a new song. Slowing the playback rate stretches the track and changes its duration; depending on the source, it can also change the perceived pitch. Reverb adds a wet version of the sound around the dry signal, which can make a vocal, beat, or synth feel more distant. The two effects have different jobs, so a balanced result comes from listening to them together instead of pushing one control to its maximum.

The extra pitch control is separate from speed. It applies a musical offset from -12 to +12 semitones after you choose the playback rate. A small negative pitch shift can reinforce a low, heavy mood, while a positive shift can make a faster setting feel brighter. Because playback rate already affects duration and may affect perceived pitch, use the pitch slider as a deliberate correction or creative choice, not as a promise of professional pitch-preserving time-stretching.

1. Choose a source file. Select an MP3, WAV, M4A, or OGG that your browser can play. The file can be up to 50 MB and 15 minutes long. Keep the original copy available and confirm that you have permission to transform and use the recording.

2. Start with a small adjustment. Try the Slowed + Reverb preset at 0.80× speed, 40% wet mix, and 0 semitone pitch. You can also choose Daycore at 0.80×, 30%, and −2, or Nightcore at 1.20×, 10%, and +2. These presets are starting points, not promises that every song will suit the same values.

3. Preview the whole idea. Play a verse, chorus, transition, and ending. Check whether the longer duration, changed feel, and reverb tail support the song. Move the sliders gradually. Reset returns the tool to its default effect settings; listen to the original file separately when you need a source comparison.

4. Select an export. Choose MP3 at 128, 192, or 320 kbps for a smaller shareable file, or choose WAV for lossless PCM output. The interface shows estimated size and output duration before export. Downloading creates a new file and leaves your original audio untouched.

5. Keep the version that works. Name the exported copy with its speed or preset so you can identify it later. If you plan to publish it, review the rights for the original recording and make sure the transformed version is allowed in the destination platform or project.

Reverb is easiest to judge in a busy section. Listen to drums, sibilants, bass attacks, and the end of vocal phrases. If the wet mix makes the beat lose definition, reduce it before changing speed again. A lower setting often keeps the atmosphere while leaving the rhythm understandable.

Use the playback position to compare the same moment after every change. Slower playback stretches gaps and any ambience already recorded in the source, while the reverb added by this tool keeps a fixed decay time. At faster settings, shorter gaps can still make the added tail overlap the next beat. Small movements and repeated previews are more reliable than judging from a single click.

Watch for clipping or harsh peaks after processing. Lower your device volume if listening becomes uncomfortable, but remember that this does not repair clipping in the exported file. If the source or export clips, reduce the source gain in another editor and reload it, or choose a cleaner recording. The browser cannot restore details that were already clipped or heavily compressed.

For study, a slower copy can give you more time to hear a bass entrance, drum pattern, or vocal phrase. If you need an accurate tempo before setting an effect, tap along with the source in the BPM Tapper and use that measurement as a reference while you audition slower values.

For a short video or a mood-focused post, a moderate slowdown and restrained reverb can create a spacious background. If you want to match the transformation to the song's tonal center, analyze the source in the Key & BPM Finder first; the key result can help you choose whether an extra semitone shift will support the rest of the project.

For DJ preparation or a production sketch, use this page to audition a new feel before you commit to a longer edit. When you need the vocals and instruments as separate material rather than one processed mix, use the AI Stem Splitter first and apply effects to the stem that fits your arrangement.

The exported result is also useful for comparing creative directions. Make one version with the standard Slowed + Reverb preset, another with a lighter wet mix, and a third with a small pitch offset. Keep the source and the settings together so the choice remains reversible.

The input accepts MP3, WAV, M4A, and OGG files up to 50 MB and 15 minutes. Browser decoding depends on the actual codec and browser support, so a file with an accepted extension can still fail if its encoding cannot be read locally. If that happens, try another browser-supported export rather than assuming the audio itself is unusable.

All decoding, listening, effect processing, and export happen in the browser. The selected audio is not uploaded to a processing server, and the tool does not require registration. The free claim applies to this local browser tool; it does not describe every service on the site. Your original file remains where it is, while MP3 or WAV export creates a separate download.

MP3 export offers 128, 192, and 320 kbps choices. WAV export is lossless PCM and may be much larger. The page displays an estimated file size and output duration so you can choose a practical format before exporting. Treat estimates as planning information and check the downloaded file in your normal player or editor.

Only transform recordings you are allowed to use. A new file does not remove copyright or licensing obligations, and changing speed or adding reverb does not make a recording public-domain. Keep the source, the exported copy, and the setting you used so you can explain which version was shared.