BytePlus Voice and Background Audio Separation vs Vocly

BytePlus Voice and Background Audio Separation is an API service that processes audio or video files into vocal and background tracks. Drama and Narrate scenes can further separate vocals, music and sound effects. BytePlus lists video editing, vocal enhancement, video translation and voice cloning, and ASR optimization as use cases. Requests create asynchronous separation tasks, checked through polling or event notifications. Inputs must be publicly accessible HTTP or HTTPS URLs, with MP4, FLV, TS, AVI, MOV, WMV, MKV, MP3, M4A and WAV supported. Outputs can be AAC, MP3, WAV, M4A or FLAC, with AAC as the default; result URLs remain valid for 24 hours. The listed plan costs $0.01 as a one-time purchase, billed per minute of input source duration. Storage and VOD CDN distribution may add fees. The service is available through API, Linux, macOS and web, with Console, CLI and OpenAPI deployment methods.

Vocly is an Android app that uses on-device AI to separate phone audio and video into vocal and instrumental tracks. Standard mode separates vocals and instrumental; Advanced mode also separates drums, bass, and other sounds. It accepts MP3, M4A, WAV, FLAC, and OGG audio. The mixer can mute, solo, balance, loop, change tempo from 75–125%, shift pitch by ±6 semitones, and compare with the original. Users can add and synchronize lyrics for karaoke. Imported MP4 or MOV video can be exported with vocals or music while retaining its picture. Audio exports include M4A, WAV, and FLAC, with individual stems or custom mixes. Separations are saved locally, and a batch queue handles multiple files. After a one-time model download, processing works offline. The Free plan costs nothing and includes ads, separation, mixer, karaoke mode, and a stem library. Pro monthly and lifetime plans have prices not listed.