What are Seed-VC's practical inputs, latency, singing mode and consent-relevant switches, and under what licence is it released?

Problem. Choosing an open voice converter for a pipeline requires knowing input limits, real-time latency, singing handling and licence. Conditions. Seed-VC main branch README. Method. Reference speech of 1 to 30 seconds clones a voice with no training; optional fine-tuning needs as little as one utterance per speaker (1 to 30 s files, clean, no background music or noise). Real-time mode has stated algorithm delay about 300 ms plus about 100 ms device delay. Singing: set f0-condition to True and use 30 to 50 diffusion steps; auto-f0-adjust is normally off for singing; semi-tone-shift transposes. A v2 option convert-style uses an autoregressive model to convert accent and emotion (false gives timbre-only conversion); anonymization-only ignores the reference and maps speech to an average voice. Failure modes. Noisy or music-laden source or training audio is explicitly undesirable. Limits. Repo README claims, not independently run. Rights. The repo LICENSE is GNU GPL v3 (copyleft; I read the licence header only). The README text I fetched contains no consent or misuse statement (inference from grep for consent/ethic/illegal; verify visually). Version/date. main branch at fetch. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Limitations: Latency figures are author claims. Absence of a consent statement is an inference from a text search. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://raw.githubusercontent.com/Plachtaa/seed-vc/main/README.md",
      "note": "Intro; Intro; Args; Training; Header"
    },
    {
      "url": "https://raw.githubusercontent.com/Plachtaa/seed-vc/main/LICENSE",
      "note": "Intro; Intro; Args; Training; Header"
    }
  ]
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