by Erf Studio
Transition Sound Effect Maker
Whooshes, risers, downlifters, impacts, a tape stop and a reverse swell, built for the cut. Every sound is synthesised here from seeded noise and oscillators, so there is no sample library to download and no two hits need ever sound the same. Roll the dice, shape it, export a WAV.
Runs entirely in your browser. Nothing is uploaded.
How to use
- Pick a sound: whoosh, riser, downlifter, impact, tape stop or reverse swell.
- Press play. Every sound is generated on the spot, there is nothing to download.
- Shape it. Length sets the run up, tone versus air moves it between a pitched sweep and pure noise, brightness sets how far the filter travels, resonance sharpens it, tail adds air behind it, and stereo width spreads the noise across the two channels.
- Press dice for a new sound in the same family. Each one carries a seed, so it can always be made again.
- Press export wav to save it, then drop it on your timeline a beat before the cut.
Examples
- A riser under the last two seconds before a hard cut, exported at 2.4 seconds so it lands on the frame.
- A short whoosh across a whip pan, 0.4 seconds, brightness high, tail low.
- A reverse swell that builds into the first frame of a new scene: place its end on the cut, not its start.
- An impact on a title card: low tone, short tail, resonance low so it thumps rather than rings.
Frequently asked questions
Are these samples?
No. Nothing is downloaded and nothing is sampled. Every sound is synthesised in your browser from seeded noise and oscillators the moment you press play.
Can I get the same sound back?
Yes. Each sound carries a seed, shown next to the length. The same seed and the same dials render a byte-identical WAV, on any machine.
What is a reverse swell?
A decaying sound played backwards, so it builds instead of fading. Line up its end with your cut, not its start, and it will land exactly on the frame.
Can I use these commercially?
Yes. They are generated on your machine and they are yours. There is no licence to read and no attribution to give.
Why is there no upload?
There is nothing to upload. The tool creates sound rather than processing yours, and the WAV is written in the browser.
