How to add tremolo
1. Drop an audio file you already have. A video is refused here. 2. Leave light, or pick medium or deep. 3. Press “Add tremolo” and download the same file type.
GustKit runs the FFmpeg tremolo filter. Light pulses at 4 Hz with a depth of 0.35. Medium uses 5 Hz and 0.55. Deep uses 8 Hz and 0.8. MP3, WAV, M4A, OGG and FLAC keep their type. The clock time stays about the same.
A volume pulse, not a chorus
Audio chorus mixes a delay that moves. Reverb adds short room reflections. Change volume raises or lowers the whole file by one amount. This page moves the loudness up and down on a steady pulse. It does not change the pitch. A video belongs on the video pages.
The audio stays in this tab
FFmpeg runs in this browser. GustKit does not fetch audio from a link. Close the tab and the file is gone. Audio up to the limit shown next to the button.
How to check the tremolo
1. Play the download next to the original. 2. Light should pulse a little. Deep should pulse faster and harder. 3. If the file type changed, you opened a different page.
Audio chorus moves a delay. This page runs the FFmpeg tremolo filter and keeps the file type. The volume goes up and down. Nothing is uploaded.