Audio / Effects
Audio Effects Studio
Add reverb, echo, bass and treble, speed changes, lo-fi warmth, and 8D panning to any audio file in your browser, preview it live, and download the result as MP3 or WAV.
Audio Effects Studio: Your file is decoded in the browser and run through a chain of effects: bass and treble shelving filters, a lo-fi filter with soft saturation, an echo with feedback, an HRTF panner for 8D movement, and a reverb made by convolving with a room response generated on the fly. A limiter keeps boosts from clipping. The preview uses exactly the same chain as the download. Runs 100% locally in your browser with zero server file uploads.
- Category
- Video tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
MP3, WAV, M4A, OGG, or FLAC · up to 20 minutes, nothing uploaded
Your file is processed in your browser and never uploaded. Changing the speed changes the pitch too, as in slowed and sped-up edits. MP3 files are encoded with LAME, free software under the LGPL, loaded as a separate file; its source is at lame.sourceforge.io. Only edit music you have the right to use.
What each effect does
Reverb imitates a room: thousands of reflections arriving after the direct sound and fading away. Echo is a single delayed copy, repeated by feedback. Bass and treble are shelving filters, which raise or lower everything below or above a frequency, like the tone knobs on a stereo. Lo-fi rolls off the highs and adds gentle saturation, the softened sound of old tape and vinyl.
Effects add up: a little of each usually sounds better than a lot of one. Compare with the bypassed sound often by setting a preset back to Reset.
After processing
Effects change loudness, especially bass boosts and heavy reverb. To bring the result to a standard streaming level, run it through the audio normalizer; to change the file format or bitrate, use the audio converter.
How to use it
- Choose an audio file; it stays on your device.
- Start from a preset such as Slowed + reverb or Lo-fi, or set each effect yourself while the preview plays.
- Download the processed track as MP3 or WAV.
Privacy & limitations
The audio never leaves your device: decoding, effects, and encoding all happen in your browser.
Related tools
Frequently asked questions
Does changing the speed change the pitch?
Yes, deliberately: like slowing a record, a lower speed makes the track slower and deeper, which is the sound of slowed and sped-up edits. To change one without the other you need a time-stretching tool.
How long can the file be?
Up to 20 minutes and 200 MB. Longer tracks need a lot of memory in the browser once decoded; trim them first.
Which formats work?
Anything your browser can decode: MP3, WAV, M4A/AAC, OGG, and FLAC in most browsers. The result is saved as MP3 at 192 kbit/s or as uncompressed WAV.
Can I post the edited song online?
Only if you have the rights to the original. Effects do not change who owns a recording; platforms remove or demonetise edits of copyrighted songs unless the rights holder allows them.
Free tool · runs in your browser · no account required