{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "Sequential Circuits Pro-One — Vintage Monophonic Synthesizer",
    "brand": "Sequential Circuits",
    "model": "Pro-One",
    "mpn": null,
    "gtins": null,
    "handle": "ca-nightlife-electronics-sequential-pro-one-vintage-c13d0a7050",
    "url": "https://envoy-music.myshopify.com/products/ca-nightlife-electronics-sequential-pro-one-vintage-c13d0a7050",
    "catalog_product_id": "catalog:f768a15cb566",
    "lane": "production",
    "product_object": "monophonic analog synthesizer"
  },
  "offer": {
    "price": 2900.0,
    "currency": "CAD",
    "available": true,
    "condition": "Brand New",
    "price_band": "high",
    "source_verified_at": "2026-07-10T22:12:37Z"
  },
  "specifications": {"device_type":"vintage monophonic analog synthesizer","release_year":1981,"voice_architecture":"monophonic; based on one voice of the Prophet-5","sequencer":"onboard sequencer","arpeggiator":"onboard arpeggiator","category":"production","subcategory":"production","category_path":"production"},
  "connectivity": null,
  "power": null,
  "included_items": [],
  "required_accessories": [],
  "optional_accessories": [],
  "compatibility": ["exact-unit voltage, audio and control connections, and revision remain unresolved until verified from the physical offer"],
  "advisor": {
    "best_for": "Vintage monophonic analog synthesis with onboard sequencing and arpeggiation, where exact-unit inspection and maintenance are acceptable parts of ownership.",
    "who_should_skip": "Skip it without exact-unit voltage, function, serial, service, modification, and condition evidence, or if modern support and predictable maintenance are required.",
    "fit_notes": "Best for collectors, studios, and players who specifically want an early-1980s Sequential monophonic instrument and are prepared to assess and maintain an exact vintage unit.",
    "watchouts": "Treat every used Pro-One as a distinct physical offer. Verify voltage, serial and revision evidence, keyboard and control behavior, audio and control connections, modifications, service history, photos, cosmetic condition, and inclusions for that unit only.",
    "verification_questions": ["What serial, revision, and operating-voltage evidence belongs to this exact unit?","Do the keyboard, oscillators, filter, envelopes, sequencer, arpeggiator, controls, and connections function correctly?","What documented service, repair, or modification history is available?","Which seller photos, cosmetic notes, and included items belong to this physical unit?"]
  },
  "retrieval": {
    "summary": "Sequential Circuits Pro-One was introduced in 1981 as Sequential's first monophonic synthesizer. Sequential's historical record describes it as one voice of the Prophet-5 with its own sequencer and arpeggiator. It suits vintage monophonic synthesis and repeating parts, but exact voltage, revision, keyboard condition, audio and control connections, serial identity, modifications, and service history are physical-unit facts that must be verified per used offer. Multiple units with the same model must remain separate offers. Envoy Music does not stock, service, warrant, or fulfill these external-reference units.",
    "agent_summary": "Sequential Circuits Pro-One is a vintage monophonic analog synthesizer introduced in 1981, derived from one Prophet-5 voice and equipped with an onboard sequencer and arpeggiator.",
    "intent_terms": ["vintage monophonic analog synth","original Sequential Pro-One","1980s synth with sequencer","Prophet-5 derived monosynth"],
    "use_cases": ["play vintage monophonic synthesizer parts based on a single Prophet-5-derived voice","create repeating parts with the onboard sequencer and arpeggiator"],
    "skill_level": "intermediate"
  },
  "trust": {
    "has_verified_retail_listing": true,
    "source_count": 1,
    "source_tier_mix": ["retailer"],
    "evidence_flags": {"external_inventory":true,"source_availability":true,"source_price":true,"source_url":true,"structured_specs":false},
    "spec_provenance": null
  },
  "related": {
    "similar_item_ids": [],
    "comparison_reasons": ["source_count:1","lane:production","verified retail listing_reference"]
}
}