AIVoiceSeparator vs Sencial API

AIVoiceSeparator separates songs into vocal and instrumental stems for backing tracks or clean vocals. Its Studio pipeline combines BS-Roformer, Mel-Roformer, and MDX23C, then applies EBU-R128 loudness normalization. The maker reports an SDR of 12.97 dB and says this is roughly 3 dB above the open Demucs baseline. The web app accepts audio and video files up to 100 MB and 20 minutes in formats including MP3, WAV, M4A, FLAC, OGG, WebM, Opus, and MP4/MOV. You can submit YouTube or SoundCloud links; TikTok clips must be saved and uploaded. Optional Whisper transcription returns SRT, LRC, and TXT files and adds about 30 seconds to processing. A REST API accepts a URL or upload and returns both stems. The free plan allows three songs per month when signed in; pay-as-you-go credits cost $0.50. The maker says uploads and results are deleted within 24 hours and audio is not used to train AI models.

Sencial API is an audio-processing API that provides REST endpoints for separating, detecting, isolating, and analyzing sound. Its /v1/separate endpoint creates 2, 4, or 6 audio stems with lossless export. Scene detection classifies acoustic environments in real time, while isolation endpoints can focus on or suppress selected sources and enhance voices against background noise. The diarization endpoint separates and labels multiple speakers, and voice embeddings return 512-dimensional vectors for matching and clustering. WebSocket endpoints support low-latency streaming, and the Jobs API handles asynchronous work through polling or webhook notifications. Developers receive API documentation, a quick-start guide, and Python, JavaScript, and cURL examples. The free Starter plan includes 10 minutes of monthly processing, all endpoints, and 128 kbps MP3 output without a credit card. Developer costs $49 per month, with 300 minutes, real-time processing, WAV/FLAC output, and $0.20-per-minute overages. Enterprise pricing is custom.