# Doepfer A-101-2 drillable.com › eurorack › makers › doepfer-de › a-101-2. As of the capture of 9 Sep 2026; the index built 19 Sep 2026, 03:43 UTC · [cites, never asserts](/standing). Source: https://doepfer.de/a100_man/a1012_man.pdf and https://doepfer.de/a1012.htm · quotes only, no licence recorded. Search `/eurorack/makers/doepfer-de/a-101-2?q=…` · MCP https://mcp.drillable.com · [html](/eurorack/makers/doepfer-de/a-101-2?format=html) · [markdown](/eurorack/makers/doepfer-de/a-101-2?format=md) · [json](/eurorack/makers/doepfer-de/a-101-2?format=json) · [discovery](/.well-known/drillable.json) · [guide](/llms.txt) No in-force window is declared for the document. ## Records read from it (39) By drillable.com ([llm-extract/3](/standing#methods)); scored precision 1.00, recall 0.36 on the harness's last sample of 50; drillable.com ([llm-extract/1](/standing#methods)); scored precision 1.00, recall 0.41 on the harness's last sample of 44. ### [a 101 2](/eurorack/makers/doepfer-de/a-101-2) (11 records) - **type** = vactrol based combination of Low Pass filter (LP) and VCA · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=70&end=148) · [sha256:8090be511215cb8c…](/hashes/sha256:8090be511215cb8c4f831960643fb4df24073e743851aa16a09c8d4fcd97a840) - **feature** = combined mode LP+VCA is available · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=149&end=198) · [sha256:8981b2a271909c3f…](/hashes/sha256:8981b2a271909c3fc2ac2e2b596090c7204309a2e98cb707dfdf20dfc4e3bed8) - **inspired-by** = module 292 of Don Buchla · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=267&end=320) · [sha256:f05135dc8cb67e9f…](/hashes/sha256:f05135dc8cb67e9fab23c07a444d5c81b7b8ea2528646c3490fed7d0abb82483) - **note** = frequency resp. loudness changes are not as fast as for other A-100 filters or VCAs that do not use vactrols · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=2874&end=2996) · [sha256:6b0a4a18d1a57e7c…](/hashes/sha256:6b0a4a18d1a57e7c08937969c9583afd011e48cf1c3042ad649ca96aa8f2c369) - **note** = Fast attacks or decays (CV = ADSR) or FM effects in audio range (CV = LFO or VCO) are not possible with vactrol based circuits · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=2997&end=3124) · [sha256:03bb45c390dd9f42…](/hashes/sha256:03bb45c390dd9f4295f3f3eb690a40c2f1b720c7f6830b64af422db83503b40a) - **note** = By means of a LFO with gradually increasing frequency one can discover the maximum modulation frequency that the vactrols are able to follow · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=3195&end=3336) · [sha256:8955555c2d86200a…](/hashes/sha256:8955555c2d86200a3805c66a7216d413c04c689c88b2dd28b8bf361d5de6ed38) - **gate-threshold** = low: 0...+2V, high: +3...+12V · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=5715&end=5836) · [sha256:74f51a602807b65c…](/hashes/sha256:74f51a602807b65cc6ec76ad4ddc6a501bd4003a615d22da26bf54e1e14ecbed) - **inspired-by** = Buchla module 292 [superseded] · by [a reading of another capture](/hashes/sha256:f05135dc8cb67e9fab23c07a444d5c81b7b8ea2528646c3490fed7d0abb82483) · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:0a63f76ffd690ca99be6ecabe12465e2eeb5224ead8cd5cde6569cf9a0eea08c?trace&start=4129&end=4242) · [sha256:938281d797d7902d…](/hashes/sha256:938281d797d7902deebe05a28de05f3c3557fbdb7c67066eb41c46f8497184b2) - **module-type** = vactrol based combination of Low Pass filter (LP) and VCA · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:0a63f76ffd690ca99be6ecabe12465e2eeb5224ead8cd5cde6569cf9a0eea08c?trace&start=4129&end=4242) · [sha256:ac969b72bf729ff9…](/hashes/sha256:ac969b72bf729ff997cbdeefc5578e3369217413ef0068ceba279b927dc9ba42) - **coupling** = DC coupled · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:0a63f76ffd690ca99be6ecabe12465e2eeb5224ead8cd5cde6569cf9a0eea08c?trace&start=6544&end=6614) · [sha256:7a8b5d610b91ea17…](/hashes/sha256:7a8b5d610b91ea1762b430780baba56c0c5fd0d786e2ac991665f0c733041270) - **depth** = 50 mm · per https://drillable.com · as [a 101 2 · a 101 2](/eurorack/makers/doepfer-de/a-101-2) · [quote](/hashes/sha256:0a63f76ffd690ca99be6ecabe12465e2eeb5224ead8cd5cde6569cf9a0eea08c?trace&start=6858&end=6971) · [sha256:51d1f29e86905b85…](/hashes/sha256:51d1f29e86905b85b58f2890dc85ba295b44b4445579111ecc0cd2729846fd0a) ### control (5 records) - **resonance · behavior** = colors the sound and is adjustable all the way up to self-oscillation · per https://drillable.com · as [control · resonance](/eurorack/makers/doepfer-de/a-101-2/control/resonance) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1161&end=1259) · [sha256:d42945df351b1c7d…](/hashes/sha256:d42945df351b1c7d0651dae345686905a6ac644eb213cba2103c74bec4a51287) - **resonance · function** = resonance control · per https://drillable.com · as [control · resonance](/eurorack/makers/doepfer-de/a-101-2/control/resonance) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1650&end=1679) · [sha256:7feff41f3ac40c4d…](/hashes/sha256:7feff41f3ac40c4d805ed1a1abb21138b1f5954731b77f7cc43a89fa779718b7) - **resonance · setting-for-buchla-sound** = fully counterclockwise · per https://drillable.com · as [control · resonance](/eurorack/makers/doepfer-de/a-101-2/control/resonance) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=5020&end=5125) · [sha256:7b751d1bddb33d76…](/hashes/sha256:7b751d1bddb33d766fa27559ad9f42f6b8722ad0f33576f6566631beef26de49) · same value when read [9 Sep 2026, 15:41 UTC](/hashes/sha256:b1f6096f263b69553b5970bb21b07fda317a91e4f996da94c99f3253167c87f9) - **resonance · effect-on-audio-level** = increasing resonance = increasing audio level · per https://drillable.com · as [control · resonance](/eurorack/makers/doepfer-de/a-101-2/control/resonance) · [quote](/hashes/sha256:0a63f76ffd690ca99be6ecabe12465e2eeb5224ead8cd5cde6569cf9a0eea08c?trace&start=5863&end=5993) · [sha256:58b3e51adbec1048…](/hashes/sha256:58b3e51adbec1048b70eabe2b7bc55da1c91221e772ec8dd165a044c920532d6) ### [audio in](/eurorack/makers/doepfer-de/a-101-2/audio-in) (3 records) - **behavior** = very sensitive in filter mode to obtain distortion effects if desired · per https://drillable.com · as [a 101 2 · audio in](/eurorack/makers/doepfer-de/a-101-2/audio-in) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1071&end=1160) · [sha256:0f17730ec4c6d312…](/hashes/sha256:0f17730ec4c6d312cb6c624fe4bd3d5a0c4675cd550303921ba7323cfeab8070) - **function** = audio input · per https://drillable.com · as [a 101 2 · audio in](/eurorack/makers/doepfer-de/a-101-2/audio-in) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1863&end=1883) · [sha256:adee5eb41f384ac8…](/hashes/sha256:adee5eb41f384ac8b86e4f3b0cb06225b576711ccfb000ff1fc731f2ed6a8d32) - **behavior** = very sensitive in the low pass mode so that even distorted sounds can be obtained - especially for higher resonance settings · per https://drillable.com · as [a 101 2 · audio in](/eurorack/makers/doepfer-de/a-101-2/audio-in) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=4072&end=4216) · [sha256:2b8278c32bdd16a8…](/hashes/sha256:2b8278c32bdd16a8d5aecb133b88cf33618860bba39cfd0e94b585960cde690e) ### [vactrol](/eurorack/makers/doepfer-de/a-101-2/vactrol) (3 records) - **definition** = a combination of a light depending resistor (LDR) and a light emitting diode (LED) both put into a small light-proof case · per https://drillable.com · as [a 101 2 · vactrol](/eurorack/makers/doepfer-de/a-101-2/vactrol) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=672&end=807) · [sha256:a3601d23076d73f6…](/hashes/sha256:a3601d23076d73f62d8d0c71f0c625e72f97e272cab2c02f52fa3d8e374ae4d6) - **note** = known for their soft low-distortion sound · per https://drillable.com · as [a 101 2 · vactrol](/eurorack/makers/doepfer-de/a-101-2/vactrol) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=808&end=876) · [sha256:d5647443061eccdc…](/hashes/sha256:d5647443061eccdcb832986dfe049d2f85a6103a98bcb2b2331d1d0699342f7f) - **behavior** = light depending resistors inside the vactrols show a considerable slowness of the resistance variation · per https://drillable.com · as [a 101 2 · vactrol](/eurorack/makers/doepfer-de/a-101-2/vactrol) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=2766&end=2873) · [sha256:0c03994fb9c15262…](/hashes/sha256:0c03994fb9c1526230cb457a8064d2f906e95b45e1ee23aad1493b0c83592e7a) ### [controlling elements](/eurorack/makers/doepfer-de/a-101-2/controlling-elements) (2 records) - **type** = vactrols · per https://drillable.com · as [a 101 2 · controlling elements](/eurorack/makers/doepfer-de/a-101-2/controlling-elements) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=594&end=671) · [sha256:4a3cf5621277af6b…](/hashes/sha256:4a3cf5621277af6bc7c5221a6450fe989a94b0115837113259d09f95250cb05f) · same value when read [9 Sep 2026, 15:41 UTC](/hashes/sha256:db7b9ee193be3be7cb8acb3fb8a6a96be9a79f7478031d74c6c35d6dd1f865f7) ### [filter](/eurorack/makers/doepfer-de/a-101-2/filter) (2 records) - **note** = not an exact control standard (like V/Oct or dB/V) due to the crooked response of vactrols · per https://drillable.com · as [a 101 2 · filter](/eurorack/makers/doepfer-de/a-101-2/filter) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=3569&end=3676) · [sha256:d6b3c687fa02bd49…](/hashes/sha256:d6b3c687fa02bd496d64580fc62e8d79b10c8d592501bc2357862d72937fb7d0) - **lowest-frequency** = 50 Hz · per https://drillable.com · as [a 101 2 · filter](/eurorack/makers/doepfer-de/a-101-2/filter) · [quote](/hashes/sha256:0a63f76ffd690ca99be6ecabe12465e2eeb5224ead8cd5cde6569cf9a0eea08c?trace&start=6615&end=6734) · [sha256:fa3359b5f513d0fa…](/hashes/sha256:fa3359b5f513d0fa7783ee429ca8c8b2d28b82532f6f3ff82180dd80489c1f44) ### [function switch](/eurorack/makers/doepfer-de/a-101-2/function-switch) (2 records) - **function** = function toggel LP / LP+VCA / VCA · per https://drillable.com · as [a 101 2 · function switch](/eurorack/makers/doepfer-de/a-101-2/function-switch) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1680&end=1724) · [sha256:871bab3cbf29bffe…](/hashes/sha256:871bab3cbf29bffecf57c4daf211be16699694444ad8aecf136e0b2b2d905cd1) - **purpose** = serves to select the desired function resp. mode · per https://drillable.com · as [a 101 2 · function switch](/eurorack/makers/doepfer-de/a-101-2/function-switch) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=5354&end=5426) · [sha256:b37c8fa48c86aed6…](/hashes/sha256:b37c8fa48c86aed605b48f19c2ae080f1ff49f4689ec56741e4e9b2fc4bc5581) ### low pass gate (2 records) - **term · originator** = Don Buchla · per https://drillable.com · as [low pass gate · term](/eurorack/makers/doepfer-de/a-101-2/low-pass-gate/term) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=321&end=399) · [sha256:b5bd8602c8838c62…](/hashes/sha256:b5bd8602c8838c6283e11cca92f1618ca496a8a80c47a05ae71e51add64b50e8) · same value when read [9 Sep 2026, 15:41 UTC](/hashes/sha256:c71050fcbb102fec4adecb0881f4805b5a93de4bd8f99471b94b7a97a48616d2) ### [audio out](/eurorack/makers/doepfer-de/a-101-2/audio-out) (1 record) - **function** = audio output · per https://drillable.com · as [a 101 2 · audio out](/eurorack/makers/doepfer-de/a-101-2/audio-out) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1886&end=1908) · [sha256:a9c07da24b8bf94a…](/hashes/sha256:a9c07da24b8bf94aadd3341a19f78dbdab11a4c8b4adbf3d16adab2ea7463287) ### [cv in 1](/eurorack/makers/doepfer-de/a-101-2/cv-in-1) (1 record) - **function** = frequency/loudness CV input 1 · per https://drillable.com · as [a 101 2 · cv in 1](/eurorack/makers/doepfer-de/a-101-2/cv-in-1) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1782&end=1819) · [sha256:80650fb66e882eb3…](/hashes/sha256:80650fb66e882eb338e51e5a8b496f445385adccf67b38983683a2afcea6998e) ### [cv in 2](/eurorack/makers/doepfer-de/a-101-2/cv-in-2) (1 record) - **function** = frequency/loudness CV input 2 · per https://drillable.com · as [a 101 2 · cv in 2](/eurorack/makers/doepfer-de/a-101-2/cv-in-2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1822&end=1859) · [sha256:5ab7f2e864b552dd…](/hashes/sha256:5ab7f2e864b552ddc3d6a1a9e077419b088f640c885f1576906737e900908dde) ### [cv2](/eurorack/makers/doepfer-de/a-101-2/cv2) (1 record) - **function** = attenuator for CV input · per https://drillable.com · as [a 101 2 · cv2](/eurorack/makers/doepfer-de/a-101-2/cv2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1580&end=1609) · [sha256:6527c81c7bdb84bb…](/hashes/sha256:6527c81c7bdb84bbc56fb60ea953aa8d04de7a507539468727a5a1e810b56c87) ### [f a](/eurorack/makers/doepfer-de/a-101-2/f-a) (1 record) - **function** = manual frequency/loudness control · per https://drillable.com · as [a 101 2 · f a](/eurorack/makers/doepfer-de/a-101-2/f-a) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1540&end=1579) · [sha256:d3a1e692a8b987eb…](/hashes/sha256:d3a1e692a8b987ebb22c66f3dfffa7ac482d0c3d07abbce61f19c772b3bbf668) ### [g1](/eurorack/makers/doepfer-de/a-101-2/g1) (1 record) - **function** = function control input 1 (gate 1) · per https://drillable.com · as [a 101 2 · g1](/eurorack/makers/doepfer-de/a-101-2/g1) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1912&end=1948) · [sha256:bc925f87e05a8c85…](/hashes/sha256:bc925f87e05a8c853a4f053fd2a883e5670db68b35a6e3a96bda0dce1c664de7) ### [g2](/eurorack/makers/doepfer-de/a-101-2/g2) (1 record) - **function** = function control input 2 (gate 2) · per https://drillable.com · as [a 101 2 · g2](/eurorack/makers/doepfer-de/a-101-2/g2) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1952&end=1988) · [sha256:cf0f3a55ad5b77dc…](/hashes/sha256:cf0f3a55ad5b77dc09577c88afb7581f4ee303019f128dfb3569b75e86867f70) ### [led](/eurorack/makers/doepfer-de/a-101-2/led) (1 record) - **function** = control for frequency/loudness · per https://drillable.com · as [a 101 2 · led](/eurorack/makers/doepfer-de/a-101-2/led) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1725&end=1761) · [sha256:08cc034afcfcbdc0…](/hashes/sha256:08cc034afcfcbdc0b37ec5f14d1069d41a58726a479b61e88e867dbe568dcd85) ### [level](/eurorack/makers/doepfer-de/a-101-2/level) (1 record) - **function** = attenuator for audio input · per https://drillable.com · as [a 101 2 · level](/eurorack/makers/doepfer-de/a-101-2/level) · [quote](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e?trace&start=1612&end=1646) · [sha256:ccff4416c41ab116…](/hashes/sha256:ccff4416c41ab11630375c03a155b3e78e7185fbb770811377e33af457c636b7) ## Captures (2) - 9 Sep 2026, 00:04 UTC · https://doepfer.de/a100_man/a1012_man.pdf · quotes only (no licence recorded) · 0 revisits · [text](/hashes/sha256:3c8c0db6179028566070b427f48abfba9fb9f36356d9900a093ddaf4f973658e) (pdfium/7881, 6080 bytes), [older text](/hashes/sha256:fbfa5ad7d9aa0afe439ec4ff3883acc4cb92b62cb67c40d674320c9aa1d4642d) (pdfium/7881, 12 bytes) · capture [sha256:c7a5422008fbb481…](/hashes/sha256:c7a5422008fbb481e840a249ed337c7ce210535473166337f2994253e6c093eb) - 9 Sep 2026, 00:04 UTC · https://doepfer.de/a1012.htm · quotes only (no licence recorded) · 0 revisits · [text](/hashes/sha256:0a63f76ffd690ca99be6ecabe12465e2eeb5224ead8cd5cde6569cf9a0eea08c) (drillable-html-text/1, 7194 bytes) · capture [sha256:5b2fd8a9500ad599…](/hashes/sha256:5b2fd8a9500ad59977ca35f8c1ba5f30d62dbed6340d4f0db9dfee9cdfe0ab2c) 12 things the latest capture still names and no reading of it has read. A capture is what the source served at that moment; a later change at the source is a new capture, never an edit to this one. --- [standing](/standing) · Drillable™ is a trademark of Drillable LLC.