{
  "schema_version": 1,
  "projection": "envoy-agent-v1",
  "identity": {
    "title": "DOEPFER MS-404 MIDI ANALOG SYNTHESIZER TB-303 115V",
    "brand": "Doepfer",
    "model": null,
    "mpn": null,
    "gtins": null,
    "handle": "gm-doepfer-ms-404-doepfer-ms-404-midi-analog-synthesizer-tb-303-115v-ec4773ba",
    "url": "https://envoy-music.myshopify.com/products/gm-doepfer-ms-404-doepfer-ms-404-midi-analog-synthesizer-tb-303-115v-ec4773ba",
    "catalog_product_id": "product_c988c93bec4773ba",
    "lane": "production",
    "product_object": "analog synthesizer"
  },
  "offer": {
    "price": 753.5,
    "currency": "CAD",
    "available": true,
    "condition": "Very Good",
    "price_band": "mid",
    "source_verified_at": null
  },
  "specifications": {"type":"json","groups":[]},
  "connectivity": ["midi"],
  "power": null,
  "included_items": null,
  "required_accessories": ["keyboard stand","sustain pedal","headphones or amp"],
  "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": "DOEPFER MS-404 MIDI ANALOG SYNTHESIZER TB-303 115V. Doepfer. MS-404. Keyboards and Synths. Keyboards and Synths. available from reverb. price range 550 USD. condition Very Good. The Doepfer MS-404 is basically a TB-303 emulator. It's analog, monophonic, has a nice 24dB\/oct VCF (filter), a simple envelope and the bonus of two LFOs. As with any 303 emulator, the MS-404 has the typical 303 controls you would expect for the filter and envelope. However the two added LFOs add a whole new dimension to the 303 sound. This is because they can modulate the VCOs! Other common 303 emulator features also found on the MS-404 include an external filter input, CV\/GATE interfacing, MIDI implementation and a glide effect. All parameters are MIDI controllable. The slide and accent effects from the 303 are possible on the MS-404 from the glide control and MIDI velocity for accent. The MS-404 ranks high among the 303 emulators under $500, and it sounds pretty darn good too. It has been used by Hardfloor and Josh Wink. [Condition] Used(Very Good) \/ perfect working condition This unit was checked by professional technician. with power cable Attention!! This item is 115v 50\/60hz. you may need a step down transformer depending on your country. International Buyers - Please Note: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding\/buying. For US customers: Shipping costs include all handling fees, duties, and customs charges. There are no additional costs. You can order as normal.Please note that items over $2,500 will still be subject to customs duties upon receipt.. DOEPFER MS-404 MIDI ANALOG SYNTHESIZER TB-303 115V. Doepfer. MS-404. . Very Good. Keyboards and Synths. Keyboards and Synths. The Doepfer MS-404 is basically a TB-303 emulator. It's analog, monophonic, has a nice 24dB\/oct VCF (filter), a simple envelope and the bonus of two LFOs. As with any 303 emulator, the MS-404 has the typical 303 controls you would expect for the filter and envelope. However the two added LFOs add a whole new dimension to the 303 sound. This is because they can modulate the VCOs! Other common 303 emulator features also found on the MS-404 include an external filter input, CV\/GATE interfacing, MIDI implementation and a glide effect. All parameters are MIDI controllable. The slide and accent effects from the 303 are possible on the MS-404 from the glide control and MIDI velocity for accent. The MS-404 ranks high among the 303 emulators under $500, and it sounds pretty darn good too. It has been used by Hardfloor and Josh Wink. [Condition] Used(Very Good) \/ perfect working condition This unit was checked by professional technician. with power cable Attention!! This item is 115v 50\/60hz. you may need a step down transformer depending on your country. International Buyers - Please Note: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding\/buying. For US customers: Shipping costs include all handling fees, duties, and customs charges. There are no additional costs. You can order as normal.Please note that items over $2,500 will still be subject to customs duties upon receipt.. Deep Ocean 2. Nagoya, Japan. tags source:reverb family:keyboards_and_synths listing_status:live brand:doepfer model:ms_404 category:keyboards_and_synths price_band:mid segment:intermediate condition:very_good has:photos",
    "agent_summary": "Doepfer MS-404 is a aimed at intermediate players keyboards and synths listing with marketplace-sourced data. DOEPFER MS-404 MIDI ANALOG SYNTHESIZER TB-303 115V currently sits around 550 USD. The Doepfer MS-404 is basically a TB-303 emulator. Marketplace data is richer on listing context, but it needs more buyer verification. Good visual coverage for spot-checking the item. Marketplace listing quality varies by seller, so condition and included items still need verification.",
    "intent_terms": ["DOEPFER MS-404 MIDI ANALOG SYNTHESIZER TB-303 115V","Doepfer","MS-404","Keyboards and Synths","brand:doepfer","category:keyboards_and_synths","condition:very_good","family:keyboards_and_synths","has:photos","listing_status:live","model:ms_404","price_band:mid","segment:intermediate","source:reverb","brand doepfer","category keyboards and synths","condition very good","family keyboards and synths","has photos","listing status live","model ms 404","price band mid","segment intermediate","source reverb","live-performance","tone-shaping","Deep Ocean 2","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": ["studio-recording","live-performance","sound-design"],
    "skill_level": "intermediate"
  },
  "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:\/\/doepfer.de\/ms404m_e.htm","method":"gear_universe_read_model","read_model_updated_at":"2026-07-29 18:48:45.81598+00"}}
  },
  "related": {
    "similar_item_ids": [],
    "comparison_reasons": ["source_count:1","family:Keyboards and Synths","marketplace_only","identity_confidence:0.9"]
}
}