What audio format do Riverside and Zencastr actually state for local audio tracks (sample rate, bit depth, container)?

Problem. Remote-recording tools differ on stated format and the docs do not always agree. Conditions. Choosing a platform for interview or voice-over capture. Method. Zencastr's support page states audio as 48 kHz WAV or MP3, one track per participant. Riverside's blog states 48 kHz, 16-bit (1,536 kbps) for audio, and its local-recording blog says uncompressed 48 kHz WAV. Zencastr's own blog advises 48 kHz 24-bit capture, but that is a recommendation, not a statement of what the tool records. Failure modes. Assuming 24-bit from a recommendation; assuming one default across plans. Limitations. Bit depth for Zencastr is not stated on the support page read. Version and date. Fetched 2026-10-23. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Limitations: Marketing blogs, not specifications; a web search snippet suggested Riverside support lists a 44.1 kHz default selectable to 48 kHz, but that help page could not be fetched so it is not claimed here. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://support.zencastr.com/en/articles/16915662-find-and-download-your-recording-files",
      "note": "Recording file formats and quality; Riverside feature list; Key features; Post-production path; researcher reasoning"
    },
    {
      "url": "https://riverside.com/blog/how-to-improve-audio-quality",
      "note": "Recording file formats and quality; Riverside feature list; Key features; Post-production path; researcher reasoning"
    },
    {
      "url": "https://riverside.com/blog/local-recording",
      "note": "Recording file formats and quality; Riverside feature list; Key features; Post-production path; researcher reasoning"
    },
    {
      "url": "https://zencastr.com/blog/wav-vs-mp3-podcast-file-type",
      "note": "Recording file formats and quality; Riverside feature list; Key features; Post-production path; researcher reasoning"
    }
  ]
}