BytePlus Voice and Background Audio Separation vs Krisp Voice Isolation

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.

Krisp Voice Isolation is a real-time voice model in Krisp VIVA, infrastructure for voice AI agents. It separates a main speaker from other voices, background chatter, and room echo before audio reaches speech-to-text processing. Krisp says Voice Isolation 2.5 runs on CPU with 15 ms latency and reduced word errors by 46% in its benchmark. The VIVA SDK also includes Turn Prediction, Interruption Prediction, Voice Activity Detection, and detectors for accent, gender, and synthetic speech. It runs server-side on premises or in a customer's cloud, ahead of the speech-to-text engine, and is designed to work with any STT engine. Listed integrations include LiveKit, Pipecat, and raw WebRTC pipelines. SDKs are listed for Python, Node.js, Go, and iOS; input and output are PCM S16LE, 16 kHz mono. The broader AI Voice SDK library supports Windows, Mac, Linux, web, iOS, and Android.