{
  "id": "wiim-ultra-owner-session-intake-20261006",
  "product_id": "product:wiim-ultra",
  "received_on": "2026-10-06",
  "test_date": "2026-10-03",
  "evidence_class": "SoundPath Lab Tested — tester-recorded functional observations",
  "firmware": "5.2.829661",
  "app": "3.6.10.092711",
  "network": {
    "router": "TP-LINK TL-WDR5620 gigabit",
    "connection": "Wi-Fi",
    "band": "2.4GHz"
  },
  "cold_start_seconds": [
    42.21,
    44.74,
    40.38
  ],
  "cold_start_mean_seconds": 42.4433333333,
  "observations": [
    {
      "test": "Restart memory",
      "result": "Input and volume retained; playback not resumed; no reported silence/offline/wrong input"
    },
    {
      "test": "Wake",
      "result": "Combined Spotify/TIDAL/Cast field reports success at 2.61s; not three separately timed services. App/knob fields show 0s without explicit success selection. HDMI field shows 2.12s beside ambiguous not-tested/result wording"
    },
    {
      "test": "DLNA",
      "result": "Duration field 30, unit not explicit; zero reported interruptions, track-change failures or discovery failures; lock-screen playback continued"
    },
    {
      "test": "DLNA phone reconnect",
      "result": "Ultra continued while phone also produced audio, approximately 3s apart; playback paused after current track; phone could push playback again. Observation awaiting reproduction"
    },
    {
      "test": "Temperature",
      "result": "By touch: bottom slightly warm at 30min/1h, warm at 2h; no thermometry"
    },
    {
      "test": "Google Cast",
      "result": "Discovery successful; first playback 1.26s; 30min uninterrupted; 20 track changes without reported pop/pause/silence; resumed after 10min pause; lock screen continued"
    },
    {
      "test": "Multiroom with WiiM Amp",
      "result": "Group created in 1.69s; subjectively synchronized; 30min without group drop; volume synchronized; no track-change pops; normal after ungrouping"
    },
    {
      "test": "Wireless Sub Pro",
      "result": "RoomFit/EQ off; worked with Cast and Spotify/TIDAL and after HDMI/optical/line input changes; auto-reconnected after standby; no reported missing bass, obvious delay or tail. Source-chain details pending"
    },
    {
      "test": "TIDAL Connect",
      "result": "One playback interruption in 60 minutes: phone played while Ultra was silent; switching to the next track restored playback. Site owner confirmed one interruption and corrected the conflicting zero-count entry on 2026-10-07. Normal/high-resolution switch under 1s; pause/resume normal; 20 track changes without reported pops/pauses."
    }
  ],
  "limitations": [
    "No serial number published",
    "Phone OS iOS 27.0 transcribed but unverified",
    "Equipment inventory is not a completed compatibility test",
    "No measurement or long-term reliability claims"
  ],
  "source_filename": "测评回填wiim ultra.txt",
  "tested_by": "Rojas",
  "confirmed_on": "2026-10-07",
  "tidal_interruptions": 1,
  "correction": {
    "confirmed_on": "2026-10-07",
    "field": "TIDAL interruption count",
    "previous_entry": "No interruption",
    "corrected_entry": "One interruption in the 60-minute session; Ultra silent while phone played; next track restored playback.",
    "reason": "Site owner confirmed a typing error. No underlying network-cause or universal defect claim."
  }
}