Make a new version of your own audio with Song Slower. Start with Slowed + Reverb, Nightcore or Lofi, then adjust speed, pitch and reverb independently. Compare with the original and export a full track or selected section as MP3 or WAV. For practice, keep the original key, loop a difficult phrase, and work at your own pace. Audio processing stays on your device; normal website delivery and optional analytics still use the network.
Make an Audio Effect in 3 Steps
- Choose your effect. Open Slowed + Reverb, Nightcore or Lofi, then choose a local MP3, WAV, M4A, FLAC or OGG file that your browser can decode.
- Shape the sound. Start with the preset and adjust speed, pitch and reverb. Use Listen to original to compare, then return to the edited preview.
- Download your version. Select a full track or a section and export MP3 at 128, 192, 256 or 320 kbps, or 16-bit PCM WAV. Keep your original file for future edits.
Slowed + Reverb Preset (One Click)
Most slowed versions online share the same three settings. Our preset applies them for you:
- Speed — 87%. Slow enough to change the feel, fast enough that the song still holds its shape.
- Reverb mix — 35%. Adds a wide, roomy tail; reduce the mix if it obscures the vocals.
- Pitch — 3 semitones down. This is what gives a slowed edit its darker, heavier tone.
Click the preset, then fine-tune any of the three sliders by hand and compare before you download.
Keep the Pitch or Drop It
Slowing a song down is not the same as lowering its pitch, and the two are controlled separately here.
- Keep the pitch switch off and the vocals stay in the same key — what you want for practice, transcription and language learning.
- Switch to pitch mode and you can drop the song by up to 12 semitones without slowing it further — the sound behind slowed + reverb edits.
Change one, leave the other alone. Nothing is locked together.
Who Uses a Song Slower
- Musicians and music students: slow a solo to 70% to make individual notes easier to follow.
- Singers and producers: build slowed + reverb versions and covers without a DAW.
- Podcasters and video editors: stretch a backing track so it fits a longer cut.
- Language learners: play audio at 75% to hear syllables more clearly.
- Fan edits: make slowed versions of a track to pair with your own video or artwork.
Speed & Reverb Controls
| Setting | Range / value |
|---|---|
| Speed | 50%–100% (0.5x–1x) |
| Reverb mix | 0%–60% |
| Pitch | 0 to −12 semitones |
| Input formats | MP3, WAV, M4A, FLAC, OGG; browser decoding support varies |
| Output formats | MP3 128–320 kbps, WAV |
| File size | up to 200 MB |
| Processing | 100% in your browser — files are never uploaded |
| Account | not required |
More Free Audio Tools
- Slowed + Reverb Generator — add the reverb-tail version in one click.
- Nightcore Maker — the same engine, sped up and pitched up.
- Lofi Slowed + Reverb Maker — softer, warmer slowed versions.
Music Slower for Practice: Loop a Difficult Passage
For instrumental practice, begin with the pitch switch off, reverb at zero, and speed around 80%. Keeping the key unchanged lets you compare what you hear with your instrument, sheet music, or a familiar backing track. Added reverb can hide the attack of a note, so leave it out while you work on timing. Listen to the original once before slowing it down; you need to know the phrasing you are trying to reproduce, not only the order of the notes.
Choose Practice for a dry, slower sound that keeps the original key. Open Practice & trim, select the start and end of a short phrase, and enable Loop section to repeat it. Times in the controls refer to the original song; phrase selection is manual. If the phrase remains difficult, move down to 70% and concentrate on a small group of notes. Once you can play it evenly, raise the speed by five percentage points. Repeat that progression until you can play the phrase at the original speed without changing the fingering or rhythm.
A slowed recording helps you hear details; it does not isolate an instrument from a mixed song. Dense drums, overlapping voices, and distortion remain in the source. If a part is hard to distinguish, try a cleaner recording you already have permission to use. Export a dry WAV practice version when you want a reusable file, and keep the original nearby so you can compare articulation and timing at normal speed.
Creator Edits: Match the Mood and Timing
For a video or artwork edit, start with the Slowed + Reverb preset and listen to both a quiet passage and a busy chorus. The preset gives you a repeatable starting point at 87% speed, 35% reverb, and three semitones down. It is not a promise that those settings suit every song. A recording with existing room sound may need much less added reverb than a dry vocal. Reduce the mix until consonants and drum hits stay readable.
Plan the duration before exporting. At 80% speed, a three-minute source becomes approximately three minutes and forty-five seconds here. Reverb is rendered within that duration, without extra time appended. That change can move a chorus or beat away from the cut you planned. Choose Full track for a complete audio export, or enable a section and select Selected section to download only that passage. Quick preview plays up to twenty seconds of the original at your chosen speed; it does not shorten a full-track download. Video cuts and synchronization still belong in your video editor. Revisit the speed setting if the musical phrase no longer fits.
Compare each version at a comfortable playback level and change one setting at a time. Speed changes the pace, pitch changes the key, and reverb changes the sense of space. Save the original source so another edit starts from clean audio rather than from an already processed MP3. Before sharing a finished video, check that your permission covers the music, its edited use, and the platform where you intend to publish it.
Language and Transcription: Hear the Words
For speech, sung lyrics, or a language exercise, begin at 85% speed with pitch unchanged and reverb off. The goal is to hear the pronunciation more clearly while keeping the voice familiar. If the syllables still pass too quickly, try 75% and replay one sentence. Extremely slow settings can stretch consonants and make speech less natural, so a moderate change may be easier to understand than the lowest available speed.
Write down what you can hear, then return to normal speed and check the sentence in context. Short repeated listening sessions usually give you a more useful comparison than listening to an entire recording at half speed. This tool changes audio playback and exports a file; it does not generate a transcript, recognize a language, remove background noise, or verify the words you write. An unclear recording can remain unclear after slowing it down.
For a long interview, consider preparing a shorter source excerpt in an editor before loading it here. Processing happens in memory, and a file below the 200 MB limit can still need more memory than a phone has available. Keep private recordings on a device you control and retain the original. The browser does not upload your audio, but the downloaded result becomes a normal local file that you manage yourself.
Choose a Format and Keep Your Original
MP3 export offers 128–320 kbps, with 320 kbps selected by default and is convenient when file size matters. WAV export writes 16-bit PCM without another lossy compression step, making it useful for later editing. A WAV download cannot restore detail already removed by a compressed source, and neither format guarantees that a strong tempo or pitch change will be inaudible. Listen before downloading and preserve your source file.
MP3, WAV, M4A, FLAC, and OGG inputs have been tested in Chromium. Other browsers may decode different formats or codecs. The file limit is 200 MB, with no separate duration cap, but decoding and processing need available memory. Slowing a track also makes the output longer. On a phone, start with a short file and keep the tab open while processing; exported files remain available after you close it.
Give each download a name that records the source and settings, such as a practice version with unchanged pitch or an edit with added reverb. That makes later comparisons easier without keeping several unnamed files. When revising an export, reopen the original source and apply your new settings instead of processing the previous download again.