{"product_id":"doepfer-a-101-6-opto-fet-vcf","title":"Doepfer a-101-6 Opto FET VCF","description":"\u003cp data-start=\"254\" data-end=\"670\"\u003eThe A-101-6 from Doepfer is a flexible 6-stage filter module that uses opto-FETs—light-controlled field effect transistors—instead of traditional vactrols, resulting in a much faster response and a different tonal character. Each of the six stages can be configured as a lowpass, highpass, or one of two types of allpass filters, allowing for a wide range of filtering and phasing effects.\u003c\/p\u003e\n\u003cp data-start=\"672\" data-end=\"916\"\u003eUnlike vactrol-based designs, opto-FETs handle faster modulation signals, enabling audio-rate frequency modulation and more dynamic control. However, this speed comes with a slightly more aggressive and characterful distortion at higher levels.\u003c\/p\u003e\n\u003cp data-start=\"918\" data-end=\"1279\"\u003eThe module’s behaviour is shaped by internal jumpers (factory-set to lowpass), and you can label the selected modes directly on the panel if needed. The resonance is voltage controllable and goes all the way to self-oscillation, particularly wild when used with allpass modes. External feedback input is available for creative patching beyond the internal loop.\u003c\/p\u003e\n\u003cp data-start=\"1281\" data-end=\"1411\"\u003eA mix control blends between the dry signal and processed sound, useful for dialling in phasing effects or fully wet filter tones.\u003c\/p\u003e\n\u003cul data-start=\"1413\" data-end=\"1722\"\u003e\n\u003cli data-start=\"1413\" data-end=\"1492\"\u003e\n\u003cp data-start=\"1415\" data-end=\"1492\"\u003e6-stage filter with configurable modes per stage (lowpass, highpass, allpass)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1493\" data-end=\"1556\"\u003e\n\u003cp data-start=\"1495\" data-end=\"1556\"\u003eUses opto-FETs for fast CV response and audio-rate modulation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1557\" data-end=\"1616\"\u003e\n\u003cp data-start=\"1559\" data-end=\"1616\"\u003eCV-controllable resonance with optional external feedback\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1617\" data-end=\"1651\"\u003e\n\u003cp data-start=\"1619\" data-end=\"1651\"\u003eMix control for dry\/wet blending\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1652\" data-end=\"1722\"\u003e\n\u003cp data-start=\"1654\" data-end=\"1722\"\u003eFlexible tool for filtering, phasing, and experimental sound shaping\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Doepfer","offers":[{"title":"Regular","offer_id":52778018570572,"sku":null,"price":97.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0951\/3055\/0604\/files\/130557_doepfer_a1016_opto_fet_vcf_1305571_1920x1920_43b2c145-8e7e-4d52-93d1-5b323808cf18.webp?v=1762278581","url":"https:\/\/www.schneiderskeller.co.uk\/products\/doepfer-a-101-6-opto-fet-vcf","provider":"SchneidersKeller","version":"1.0","type":"link"}