How should a DIY voice-recording booth for narration or clone training be set up according to Microsoft's custom voice guide?

Problem: record clean voice without a studio. Conditions: small home setup. Method (Microsoft): a small room with no noticeable echo or room tone, as quiet as possible; drapes on walls to deaden the room; a studio condenser microphone made for voice (a USB mic is simplest because mic, preamp and converter are in one unit; XLR needs preamp and interface); mic on a stand or boom with a pop filter against plosives, ideally with a shock mount; the voice talent stays at a consistent distance (tape marks on the floor if standing; watch chair noise if sitting); a script stand not angled to reflect sound into the mic; engineer in a separate room with talkback; listen to a recording of silence to find noise sources (air vents, fluorescent ballasts, traffic, fans, hum from AC wiring or ground loops) and remove them at the source; set levels to use most of the dynamic range without overdriving; keep the chain simple (mic, preamp, interface, computer). EQ or noise-reduction plug-ins may help, but the guide says it is always best to stop noise at its source. Failure modes: untreated reflective rooms; notebook fans; moving closer and further between takes. Limitations: consumer guidance; specific mic brands are examples; no measurement protocol for room reverberation. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Limitations: Vendor guide for TTS data; the notion that these steps also fit narration for podcasts is my inference. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://learn.microsoft.com/en-us/azure/ai-services/speech-service/record-custom-voice-samples",
      "note": "Do it yourself; Do it yourself; Do it yourself; Do it yourself"
    }
  ]
}