Diffio AI

Diffio AI is an AI audio enhancement tool that removes background noise, room echo, reverb, hum, hiss, wind, and clipping from recorded speech in a single pass. It is used to restore speech in podcasts, interviews, lectures, sermons, Zoom calls, wedding videos, and old recordings. Users upload audio or video files (MP3, WAV, M4A, AAC, FLAC, OGG, MP4, MOV, AVI, MKV, WebM) up to 90 minutes and 2 GB per file. The company offers two restoration models, Diffio 4.7 Flash and Diffio 4.7 Pro, and provides a browser-based before-and-after comparison. For video, it restores the speech soundtrack and leaves the picture unchanged. The company also publishes its own SCOREQ-based test of six tools across 59 recordings, which it ran itself. The site includes a Developer API and cloud projects, and it has a free tier with a limited number of uploads and Flash model access, with Pro on paid plans.