{
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  "projection": "envoy-agent-v1",
  "identity": {
    "title": "ADDAC System ADDAC220 Dual Envelope Follower+",
    "brand": "ADDAC System",
    "model": null,
    "mpn": null,
    "gtins": null,
    "handle": "gm-addac-system-addac220-dual-envelope-follower-addac-system-addac220-dua-a8cc620a",
    "url": "https://envoy-music.myshopify.com/products/gm-addac-system-addac220-dual-envelope-follower-addac-system-addac220-dua-a8cc620a",
    "catalog_product_id": "product_f4091916a8cc620a",
    "lane": "production",
    "product_object": "eurorack"
  },
  "offer": {
    "price": 582.0,
    "currency": "CAD",
    "available": true,
    "condition": "Brand New",
    "price_band": "mid",
    "source_verified_at": null
  },
  "specifications": {"category":"Keyboards and Synths","subcategory":"Eurorack","category_path":"Keyboards and Synths \/ Synths \/ Eurorack"},
  "connectivity": null,
  "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": "Best suited to beginners or budget-constrained shoppers building a first usable rig.\n\nWho it is for: Players building a first keyboards and synths setup with limited budget and a need for obvious, low-friction value.\n\nWho should skip it: Skip it if you need advanced feature depth, tour-grade reliability, or a fully pro-ready setup out of the gate.",
    "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": "ADDAC System ADDAC220 Dual Envelope Follower+. ADDAC System. ADDAC220 Dual Envelope Follower+. Keyboards and Synths. Keyboards and Synths \/ Synths \/ Eurorack. available from reverb. price range 424.82 USD. condition Brand New. This is our new Stereo Envelope Follower, an analog\/digital hybrid for better dynamic range analysis. The incoming audio signal gain can be set with the [GAIN] control, the signal is then fully rectified and passed through an analog envelope follower with a fixed short attack and decay. This analog signal is then sent into a 12bit ADC (analog to digital converter) of an MCU (microcontroller unit) from here on the signal is processed digitally. Whenever the ADC detects clipping the [CLIP] led will turn On. The digitized signal is then passed through a Savitsky-Golay a for noise reduction smoothing the incoming signal. Next the signal is slewed using the [ATTACK] and [DECAY] controls. The MCU keeps a history of the last sampling points and detects the minimum and maximum values of the signal which reflect the current dynamic range and maps the signal minimum and maximum amplitude to 0V and the maximum voltage detected. Avoiding the discharge of the analog envelope capacitor. This new mapped signal is then processed via the [RESPONSE CURVE] control balacing the response like one would with a standard AD envelope with LOG\/EXP control. The [ENV. GAIN] attenuverter control goes up to x2 amplification and sets the attenuation \/ amplification factor of the output range, the red led monitors this level. The led uses pwm control for faster response and better visualization of the output signal across the full output range. - - Finally the [OFFSET] allows to displace the signal’s voltage up or down. - The [THRESHOLD] control sets the level to compare to the output signal and turns the - [GATE] output On when the signal is above the threshold. - The [GATE LED] show the output state. - The [CV OUT] carries the Envelope signal (0 to +10V) while the [INV. CV] Output carries an inversion of the signal (-10V to 0v). - The [AVG. OUT] outputs the average of both Left and Right CVs (0 to +10V) while the [INV. AVG.] outputs the inverted average signal (-10V to 0v). - The [STEREO \/ DUAL MONO] switch allows to use the left channel controls to operate the right channel for stereo operation or keep them independent in dual mono. In Stereo mode only the Right channel gain will be independent. - Left input is normalled to the Right input. - Width: 10HP - Depth: 45mm - Power: 70mA @ +12V \/ 40mA @ -12V. ADDAC System ADDAC220 Dual Envelope Follower+. ADDAC System. ADDAC220 Dual Envelope Follower+. . Brand New. Keyboards and Synths. Keyboards and Synths \/ Synths \/ Eurorack. This is our new Stereo Envelope Follower, an analog\/digital hybrid for better dynamic range analysis. The incoming audio signal gain can be set with the [GAIN] control, the signal is then fully rectified and passed through an analog envelope follower with a fixed short attack and decay. This analog signal is then sent into a 12bit ADC (analog to digital converter) of an MCU (microcontroller unit) from here on the signal is processed digitally. Whenever the ADC detects clipping the [CLIP] led will turn On. The digitized signal is then passed through a Savitsky-Golay a for noise reduction smoothing the incoming signal. Next the signal is slewed using the [ATTACK] and [DECAY] controls. The MCU keeps a history of the last sampling points and detects the minimum and maximum values of the signal which reflect the current dynamic range and maps the signal minimum and maximum amplitude to 0V and the maximum voltage detected. Avoiding the discharge of the analog envelope capacitor. This new mapped signal is then processed via the [RESPONSE CURVE] control balacing the response like one would with a standard AD envelope with LOG\/EXP control. The [ENV. GAIN] attenuverter control goes up to x2 amplification and sets the attenuation \/ amplification factor of the output range, the red led monitors this level. The led uses pwm control for faster response and better visualization of the output signal across the full output range. - - Finally the [OFFSET] allows to displace the signal’s voltage up or down. - The [THRESHOLD] control sets the level to compare to the output signal and turns the - [GATE] output On when the signal is above the threshold. - The [GATE LED] show the output state. - The [CV OUT] carries the Envelope signal (0 to +10V) while the [INV. CV] Output carries an inversion of the signal (-10V to 0v). - The [AVG. OUT] outputs the average of both Left and Right CVs (0 to +10V) while the [INV. AVG.] outputs the inverted average signal (-10V to 0v). - The [STEREO \/ DUAL MONO] switch allows to use the left channel controls to operate the right channel for stereo operation or keep them independent in dual mono. In Stereo mode only the Right channel gain will be independent. - Left input is normalled to the Right input. - Width: 10HP - Depth: 45mm - Power: 70mA @ +12V \/ 40mA @ -12V. NIGHTLIFE ELECTRONICS. Vancouver, Canada. tags source:reverb family:keyboards_and_synths listing_status:live brand:addac_system model:addac220_dual_envelope_follower category:keyboards_and_synths_synths_eurorack price_band:entry segment:beginner condition:brand_new has:photos",
    "agent_summary": "ADDAC System ADDAC220 Dual Envelope Follower+ is a beginner-friendly keyboards and synths listing with marketplace-sourced data. ADDAC System ADDAC220 Dual Envelope Follower+ currently sits around 424.82 USD. This is our new Stereo Envelope Follower, an analog\/digital hybrid for better dynamic range analysis. 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": ["ADDAC System ADDAC220 Dual Envelope Follower+","ADDAC System","ADDAC220 Dual Envelope Follower+","Keyboards and Synths","Keyboards and Synths \/ Synths \/ Eurorack","brand:addac_system","category:keyboards_and_synths_synths_eurorack","condition:brand_new","family:keyboards_and_synths","has:photos","listing_status:live","model:addac220_dual_envelope_follower","price_band:entry","segment:beginner","source:reverb","brand addac system","category keyboards and synths synths eurorack","condition brand new","family keyboards and synths","has photos","listing status live","model addac220 dual envelope follower","price band entry","segment beginner","source reverb","home-recording","content-creation","practice","starter-rig","live-performance","tone-shaping","NIGHTLIFE ELECTRONICS","Best suited to beginners or budget-constrained shoppers building a first usable rig.","Players building a first keyboards and synths setup with limited budget and a need for obvious","low-friction value."],
    "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": null
  },
  "related": {
    "similar_item_ids": ["product_15323af729e8a3ae","product_17e4acdf75947b86","product_175797f46054fd40","product_6a95024f68f1cbad","product_29e32b6b140ecea5"],
    "comparison_reasons": ["source_count:1","family:Keyboards and Synths","marketplace_only","identity_confidence:0.9"]
,
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}