{
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  "projection": "envoy-agent-v1",
  "identity": {
    "title": "DOREMiDi High-Speed USB MIDI Host Box MIDI Host USB To MIDI Converter UMH-21 and USB HUB 2.0 Hi-Speed 4 USB Ports Hub",
    "brand": "DORE MiDi USB MIDI Host",
    "model": null,
    "mpn": null,
    "gtins": null,
    "handle": "gm-dore-midi-usb-midi-host-umh-21-doremidi-high-speed-usb-midi-host-box-m-783c11b6",
    "url": "https://envoy-music.myshopify.com/products/gm-dore-midi-usb-midi-host-umh-21-doremidi-high-speed-usb-midi-host-box-m-783c11b6",
    "catalog_product_id": "product_c40fa162783c11b6",
    "lane": "studio",
    "product_object": "interfaces"
  },
  "offer": {
    "price": 47.95,
    "currency": "CAD",
    "available": true,
    "condition": "Very Good",
    "price_band": "entry",
    "source_verified_at": null
  },
  "specifications": {"type":"json","groups":[{"name":"Core function","fields":[{"label":"Model","value":"UMH-21 High-Speed USB MIDI HOST Box","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"},{"label":"USB host interface","value":"Standard high-speed USB MIDI HOST interface (USB 2.0)","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"},{"label":"DIN MIDI interface","value":"One 5-pin MIDI input and one 5-pin MIDI output, 16-channel standard MIDI interface","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"}]},{"name":"Power and compatibility","fields":[{"label":"Power input","value":"5V–12V DC, center-positive","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"},{"label":"USB compatibility","value":"USB Host compatible with USB 2.0, USB 1.0, and USB 1.1 MIDI devices","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"},{"label":"Firmware update","value":"Update key supports firmware upgrades for compatibility updates","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"}]},{"name":"Physical","fields":[{"label":"Size","value":"115 x 53 x 33 mm","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"},{"label":"Material","value":"Aluminum alloy","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"},{"label":"USB hub support","value":"USB HOST interface can connect to a first-level USB hub, up to 4 USB ports","source":"https:\/\/www.doremidi.cn\/h-pd-36.html"}]}]},
  "connectivity": ["usb","midi"],
  "power": null,
  "included_items": null,
  "required_accessories": ["appropriate cables","monitoring solution","mount or stand if relevant"],
  "optional_accessories": null,
  "compatibility": null,
  "advisor": {
    "best_for": null,
    "who_should_skip": null,
    "fit_notes": null,
    "watchouts": null,
    "verification_questions": ["Can you confirm exactly what is included in the sale and show it in current photos?","Are there any functional issues, repairs, or missing parts not shown in the listing?","Can you provide close-up photos of wear points, serial numbers, and any modifications?","Can you confirm the core specs that matter for compatibility in this setup?","Is this still available and has anything changed since the listing was posted?"]
  },
  "retrieval": {
    "summary": "DOREMiDi High-Speed USB MIDI Host Box MIDI Host USB To MIDI Converter UMH-21 and USB HUB 2.0 Hi-Speed 4 USB Ports Hub. DORE MiDi USB MIDI Host. UMH-21. Pro Audio. Pro Audio \/ Interfaces. available from reverb. price range 35 USD. condition Very Good. DORE Midi usb midi host. Comes with PSU Has some tape residue from the labels i had on it. Works great!. DOREMiDi High-Speed USB MIDI Host Box MIDI Host USB To MIDI Converter UMH-21 and USB HUB 2.0 Hi-Speed 4 USB Ports Hub. DORE MiDi USB MIDI Host. UMH-21. . Very Good. Pro Audio. Pro Audio \/ Interfaces. DORE Midi usb midi host. Comes with PSU Has some tape residue from the labels i had on it. Works great!. Send_Help Store. Philadelphia, PA, United States. tags source:reverb family:pro_audio listing_status:live brand:dore_midi_usb_midi_host model:umh_21 category:pro_audio_interfaces price_band:entry segment:beginner condition:very_good has:photos",
    "agent_summary": "DORE MiDi USB MIDI Host UMH-21 is a beginner-friendly pro audio listing with marketplace-sourced data. DOREMiDi High-Speed USB MIDI Host Box MIDI Host USB To MIDI Converter UMH-21 and USB HUB 2.0 Hi-Speed 4 USB Ports Hub currently sits around 35 USD. DORE Midi usb midi host. Marketplace data is richer on listing context, but it needs more buyer verification. Entry-level price positioning makes it accessible for new players. Marketplace listing quality varies by seller, so condition and included items still need verification.",
    "intent_terms": ["DOREMiDi High-Speed USB MIDI Host Box MIDI Host USB To MIDI Converter UMH-21 and USB HUB 2.0 Hi-Speed 4 USB Ports Hub","DORE MiDi USB MIDI Host","UMH-21","Pro Audio","Pro Audio \/ Interfaces","brand:dore_midi_usb_midi_host","category:pro_audio_interfaces","condition:very_good","family:pro_audio","has:photos","listing_status:live","model:umh_21","price_band:entry","segment:beginner","source:reverb","brand dore midi usb midi host","category pro audio interfaces","condition very good","family pro audio","has photos","listing status live","model umh 21","price band entry","segment beginner","source reverb","home-recording","content-creation","practice","starter-rig","live-performance","tone-shaping","signal-chain","Send_Help Store","Best suited to beginners or budget-constrained shoppers building a first usable rig.","Players building a first pro audio setup with limited budget and a need for obvious","low-friction value."],
    "use_cases": ["studio-recording","live-performance","modular-synthesis"],
    "skill_level": null
  },
  "trust": {
    "has_verified_retail_listing": true,
    "source_count": 1,
    "source_tier_mix": ["marketplace"],
    "evidence_flags": {"has_description":true,"has_images":true,"has_reviews":false,"has_specs":false,"source_count":1},
    "spec_provenance": {"specifications":{"source_url":"https:\/\/www.doremidi.cn\/h-pd-36.html","method":"gear_universe_read_model","fetched":"2026-07-30"}}
  },
  "related": {
    "similar_item_ids": [],
    "comparison_reasons": ["source_count:1","family:Pro Audio","marketplace_only","identity_confidence:0.9"]
}
}