Howtosignalprocessing
How do I add effects to my iPhone audio?
In the iMovie app on your iPhone, open a movie project. Scroll the timeline so that the playhead (the white vertical line) appears where you want the sound effect to begin. Tap the Add Media button , then tap Audio. Tap Sound Effects.
Is there an app that adds reverb?
Download the Reverb App for either iOS or Android.
