{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "J Haible FS1-A Frequency Shifter",
    "brand": "Jurgen Haible",
    "model": null,
    "mpn": null,
    "gtins": null,
    "handle": "gm-jurgen-haible-fs1-a-j-haible-fs1-a-frequency-shifter-7ce508e5",
    "url": "https://envoy-music.myshopify.com/products/gm-jurgen-haible-fs1-a-j-haible-fs1-a-frequency-shifter-7ce508e5",
    "catalog_product_id": "product_285b8d437ce508e5",
    "lane": "production",
    "product_object": "analog synths"
  },
  "offer": {
    "price": 1096.0,
    "currency": "CAD",
    "available": true,
    "condition": "Brand New",
    "price_band": "high",
    "source_verified_at": null
  },
  "specifications": {"type":"json","groups":[{"name":"Product facts","fields":[{"label":"Audio resolution","value":"1kHz","source":"http:\/\/jhaible.com\/legacy\/frequency_shifter_fs1a\/fs1a"}]},{"name":"Format and size","fields":[{"label":"Dimensions note","value":"160mm x 100mm sized boards: Board 1 contai","source":"http:\/\/jhaible.com\/legacy\/frequency_shifter_fs1a\/fs1a"},{"label":"Format","value":"Eurorack","source":"https:\/\/envoy-music.myshopify.com\/products\/gm-jurgen-haible-fs1-a-j-haible-fs1-a-frequency-shifter-7ce508e5"},{"label":"160mm x 100mm sized boards","value":"Board 1 contai","source":"https:\/\/envoy-music.myshopify.com\/products\/gm-jurgen-haible-fs1-a-j-haible-fs1-a-frequency-shifter-7ce508e5"}]},{"name":"Power","fields":[{"label":"Power","value":"330 Vocoder Plus (All opamps and OT","source":"http:\/\/jhaible.com\/legacy\/frequency_shifter_fs1a\/fs1a"}]}]},
  "connectivity": null,
  "power": null,
  "included_items": null,
  "required_accessories": ["keyboard stand","sustain pedal","headphones or amp"],
  "optional_accessories": null,
  "compatibility": null,
  "advisor": {
    "best_for": "Players matching the published factory\/retail specs listed above.",
    "who_should_skip": null,
    "fit_notes": "Verify power, format, and connectivity against your rig before purchase; only sourced fields are listed.",
    "watchouts": "Unsourced claims are omitted. Listing-specific mods, kits, or incomplete units may not match the base model specs.",
    "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": "J Haible FS1-A Frequency Shifter. Jurgen Haible. FS1-A. Keyboards and Synths. Keyboards and Synths \/ Synths \/ Analog Synths Keyboards and Synths \/ Synths \/ Desktop Synths. available from reverb. price range 800 USD. condition Brand New. FS1-A frequency shifter with custom panel and black steel powdercoat hammond enclosure. Torroid power transformer and all available controls and input\/output jacks from original build doc included. An additional tap LFO section has been included that can be assigned to either Manual or Range, allowing easy time synced modulation with 8 possible waveforms. Input jack is TRS and will accept either Mic or Line signal (the optional SSM2019 is installed on input board so tons of clean gain available for mic signals). Units ship out with approximately 2 weeks lead time from purchase.. J Haible FS1-A Frequency Shifter. Jurgen Haible. FS1-A. . Brand New. Keyboards and Synths. Keyboards and Synths \/ Synths \/ Analog Synths Keyboards and Synths \/ Synths \/ Desktop Synths. FS1-A frequency shifter with custom panel and black steel powdercoat hammond enclosure. Torroid power transformer and all available controls and input\/output jacks from original build doc included. An additional tap LFO section has been included that can be assigned to either Manual or Range, allowing easy time synced modulation with 8 possible waveforms. Input jack is TRS and will accept either Mic or Line signal (the optional SSM2019 is installed on input board so tons of clean gain available for mic signals). Units ship out with approximately 2 weeks lead time from purchase.. BCM ANALOG. Austin, TX, United States. tags source:reverb family:keyboards_and_synths listing_status:live brand:jurgen_haible model:fs1_a category:keyboards_and_synths_synths_analog_synths category:keyboards_and_synths_synths_desktop_synths price_band:mid segment:intermediate condition:brand_new has:photos",
    "agent_summary": "Jurgen Haible FS1-A is a aimed at intermediate players keyboards and synths listing with marketplace-sourced data. J Haible FS1-A Frequency Shifter currently sits around 800 USD. FS1-A frequency shifter with custom panel and black steel powdercoat hammond enclosure. Marketplace data is richer on listing context, but it needs more buyer verification. Positioned as a realistic step-up option for players leaving starter gear. Marketplace listing quality varies by seller, so condition and included items still need verification.",
    "intent_terms": ["J Haible FS1-A Frequency Shifter","Jurgen Haible","FS1-A","Keyboards and Synths","Keyboards and Synths \/ Synths \/ Analog Synths","Keyboards and Synths \/ Synths \/ Desktop Synths","brand:jurgen_haible","category:keyboards_and_synths_synths_analog_synths","category:keyboards_and_synths_synths_desktop_synths","condition:brand_new","family:keyboards_and_synths","has:photos","listing_status:live","model:fs1_a","price_band:mid","segment:intermediate","source:reverb","brand jurgen haible","category keyboards and synths synths analog synths","category keyboards and synths synths desktop synths","condition brand new","family keyboards and synths","has photos","listing status live","model fs1 a","price band mid","segment intermediate","source reverb","live-performance","tone-shaping","BCM ANALOG","Best suited to players who have outgrown their first setup and need a meaningful step up.","Shoppers who already understand the role of this keyboards and synths and want a more deliberate purchase."],
    "use_cases": ["modular-synthesis","sound-design"],
    "skill_level": "pro"
  },
  "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":"http:\/\/jhaible.com\/legacy\/frequency_shifter_fs1a\/fs1a","method":"gear_universe_read_model","fetched":"2026-07-30"}}
  },
  "related": {
    "similar_item_ids": [],
    "comparison_reasons": ["source_count:1","family:Keyboards and Synths","marketplace_only","identity_confidence:0.9"]
}
}