# Synthesis Technology E440 Discrete OTA VCF

drillable.com › eurorack › makers › synthtech-com › e440.
As of the capture of 9 Sep 2026; the index built 18 Sep 2026, 19:58 UTC · [cites, never asserts](/standing).
Source: https://synthtech.com/docs/E440_manual.pdf and https://synthtech.com/eurorack/E440/ · quotes only, no licence recorded.
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## Records read from it (36)

1 of 1 figure in the text, amounts and percentages, has a record.

By drillable.com ([llm-extract/3](/standing#methods)); scored precision 1.00, recall 0.36 on the harness's last sample of 50.

### [e440](/eurorack/makers/synthtech-com/e440) (27 records)

- **slope** = 2pole (-12dB/oct), 3pole (-18dB/oct) and 4pole (-24dB/oct) · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=244&end=358) · [sha256:0732e5a4781f3335…](/hashes/sha256:0732e5a4781f3335a675175f4a73850b58ba5387680692815e3ee17a6ac33bc5)
- **behavior** = self-oscillate at high resonance and can be used for a sine VCO · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=458&end=536) · [sha256:7cf96fbb2894ddba…](/hashes/sha256:7cf96fbb2894ddbaf06afe0376b836ac780ccdafa7fc599a786ad47c7e49f640)
- **tracking-range** = 4-octave range · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=599&end=654) · [sha256:11723c46aa1ffef0…](/hashes/sha256:11723c46aa1ffef0a267c7a95e1d73c62096c4a91ff0ed5c037444b161de10fd)
- **input-voltage-range** = -5V to +5V · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2186&end=2241) · [sha256:e5dba813e5122910…](/hashes/sha256:e5dba813e512291063187756700500695d6b352f1d70145176fea525777c2cf9) · same value when read [13 Sep 2026, 15:21 UTC](/hashes/sha256:c4f3a6dbaf225d9200d9265af9abb5222a7e558bd615cecd5448770e02f99b26)
- **attenuator** = FM1 and FM2 are on attenuators, while 1V/Oct and RES CV are not. · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2242&end=2307) · [sha256:38d95ebc25d0e5c9…](/hashes/sha256:38d95ebc25d0e5c9d221669313620b52a848883316951a8faad75ee20978c153)
- **max-input-level** = 14V pk-pk · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2328&end=2370) · [sha256:9216ce27b00ecf80…](/hashes/sha256:9216ce27b00ecf80081b68cd446f846df56653260d73065f2791071eb48efacd)
- **description** = The 3 outputs are the lowpass responses. · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2371&end=2412) · [sha256:1acbf48d4cf0021b…](/hashes/sha256:1acbf48d4cf0021b90968d39fcfd44ea7415312bb485fc8c8c0145b3e2a8f7db)
- **feature** = All 3 outputs share the resonance and cutoff CVs. · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2413&end=2462) · [sha256:27fec22fb78b4a1f…](/hashes/sha256:27fec22fb78b4a1feb3783af6e64a40726c5edcd04687f12f1f266b8f1644874)
- **architecture** = The 4 OTA stages are not gain-matched and the filter caps are +-5%. · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2621&end=2688) · [sha256:727b2ed6b3d3731b…](/hashes/sha256:727b2ed6b3d3731b31a83a5fb18b0cc34d6594170907e621ad2d92f96bcc3a7d)
- **behavior** = This will cause each stage to vary slightly in gain relative to the others. · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2689&end=2765) · [sha256:728039e41d9ee1c9…](/hashes/sha256:728039e41d9ee1c984ed0e79ce7f557253ecd514a871ff439d8ae28caacc3c3c)
- **input-voltage-range** = -5V to +5V, DC to 10KHz · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2824&end=2859) · [sha256:f7cf730c00529178…](/hashes/sha256:f7cf730c005291789cb82d1e23ea897b5e7451142589b365542e38ff539b6d39)
- **range** = 0V (no resonance) to +5V (full resonance) · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2860&end=2912) · [sha256:44fbe4448fcff8fe…](/hashes/sha256:44fbe4448fcff8fe86487c06e2fd6010f7354abec462af0e9b9be3f7f2ccbd91)
- **input-impedance** = 50K nominal · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2914&end=2975) · [sha256:a9e5c2d5ebcfbe81…](/hashes/sha256:a9e5c2d5ebcfbe8123984b60ed11e57cc02c96239aa6b21bfd1e997fc2783891)
- **current-draw-negative-12v** = 23 mA [disagreement] · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=3013&end=3051) · [sha256:2595f86c301f7577…](/hashes/sha256:2595f86c301f757776698f92ef9a5d93462854a94297e80ee7590d492a4763e9)
- **current-draw-positive-12v** = 23 mA · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=3013&end=3051) · [sha256:9e82f262a8b84480…](/hashes/sha256:9e82f262a8b84480ca17617df9bfdb6d06db1cd2da57a233d10d115b388e52e4) · same value when read [13 Sep 2026, 15:21 UTC](/hashes/sha256:80f1cfd94e9d6370421b50a9ae49042711ac793e20f94782fedc786ec3e4d4af)
- **features** = separate outputs for each filter slope and an input Drive control · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=120&end=263) · [sha256:803fc58790943f4a…](/hashes/sha256:803fc58790943f4a0602483028b1c8a356d68469c02a13ef1e87887a44baaf49)
- **based-on** = 5U MOTM-440 filter · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=120&end=263) · [sha256:94a1a492e974735c…](/hashes/sha256:94a1a492e974735c31af429fee7c86ba8e763045fafa3b4d59bd6adce97adc5b)
- **features** = Voltage control of filter resonance · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=750&end=836) · [sha256:b4d5a8a06de0dd95…](/hashes/sha256:b4d5a8a06de0dd95773ed021f6f6f1bee463a00074d5e8cf0d85a3bc8329946f)
- **depth** = 32 mm · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=887&end=897) · [sha256:12fe76042cbb258e…](/hashes/sha256:12fe76042cbb258e11aa098f70a72438bfe42c3ece2c1d8d68b50cbaa53c1108)
- **power-connector** = 14-pin Eurorack · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=899&end=953) · [sha256:8de4441fb4f6bc2a…](/hashes/sha256:8de4441fb4f6bc2af55538f03d31992e94abfc0a55d7b5ac64829375f37de7a6)
- **current-draw-negative-12v** = 12 mA [disagreement] · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=938&end=952) · [sha256:5c5d1109c4e185cb…](/hashes/sha256:5c5d1109c4e185cb443f01bbd4ff1e0fbe4b80bfc46f1b4246ea4e806a5bed03)
- **frequency-range** = DC to 10KHz · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=955&end=1001) · [sha256:94f1a03bb61eb8ab…](/hashes/sha256:94f1a03bb61eb8ab1021381ddfe7ced7975bc078b8107921e6ee830b4f7027fd)
- **range** = 100mv to 14Vpp [superseded] · by [a reading of another capture](/hashes/sha256:44fbe4448fcff8fe86487c06e2fd6010f7354abec462af0e9b9be3f7f2ccbd91) · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=1028&end=1083) · [sha256:327690d9980b14f1…](/hashes/sha256:327690d9980b14f104bf25c6eded7df7d59c9539142a4878f97e757bc2ce7819)
- **frequency-range** = 20Hz to 18KHz · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=1085&end=1147) · [sha256:d5775bf1c3a77e32…](/hashes/sha256:d5775bf1c3a77e32d0094d87a92b60b5103cdfddb44123326c1215fb73420ec2)
- **control** = JP1: Bass boost enhancement (OFF/ON) · as [e440 · e440](/eurorack/makers/synthtech-com/e440) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=1149&end=1200) · [sha256:2740e6ed2f0c86d6…](/hashes/sha256:2740e6ed2f0c86d6f5588ec62ad0a63d7294b587db3aac9ede1427f2f3ef4a44)

### [frequency](/eurorack/makers/synthtech-com/e440/frequency) (3 records)

- **function** = the cutoff (or self-oscillation initial frequency) · as [e440 · frequency](/eurorack/makers/synthtech-com/e440/frequency) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=1687&end=1755) · [sha256:e5dbb043f100f55b…](/hashes/sha256:e5dbb043f100f55b57fa12f354cff440aaccfae718c9389c3b9864ca636281c7)
- **behavior** = The VCF will internally add all 4 CV inputs together to determine the filter’s cutoff frequency. · as [e440 · frequency](/eurorack/makers/synthtech-com/e440/frequency) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=1756&end=1855) · [sha256:8a05a1e773767099…](/hashes/sha256:8a05a1e77376709908a98d6a4ba5ef5c04184790579c350f1bf38f9295be8f43)
- **frequency-range** = 20Hz to ~18KHz · as [e440 · frequency](/eurorack/makers/synthtech-com/e440/frequency) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=1856&end=1885) · [sha256:1d6c633e08aa22b8…](/hashes/sha256:1d6c633e08aa22b867d838f8cdc0e9241c8d2089168bfe377ad01d110f76d6fe)

### [drive](/eurorack/makers/synthtech-com/e440/drive) (2 records)

- **behavior** = The filter can be over-driven to clipping (with a large voltage output swing, ~14V pk-pk). · as [e440 · drive](/eurorack/makers/synthtech-com/e440/drive) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=1987&end=2077) · [sha256:7b52a708a0d90cda…](/hashes/sha256:7b52a708a0d90cdad900e44586e2dfa7290304c9aa0fd9bd7dfe9cd0fa93c7c4)
- **function** = You can use this control to boost line-level signals as well. · as [e440 · drive](/eurorack/makers/synthtech-com/e440/drive) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=2078&end=2140) · [sha256:23747013211e2687…](/hashes/sha256:23747013211e2687f4234b0a4021ca407838d3ec2f831ad9d498742afb468ed3)

### [ssm2040](/eurorack/makers/synthtech-com/e440/ssm2040) (2 records)

- **used-in** = Prophet-5 Rev 2, Voyetra 8, and others · as [e440 · ssm2040](/eurorack/makers/synthtech-com/e440/ssm2040) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=265&end=368) · [sha256:24d02e6573fe67b9…](/hashes/sha256:24d02e6573fe67b989e02f8b8fbf7c9d640f82b572f010a907ba88c0cecad783)
- **architecture** = clever discrete OTA gain cell that responds beautifully as additional gain is added to the input signal · as [e440 · ssm2040](/eurorack/makers/synthtech-com/e440/ssm2040) · [quote](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675?trace&start=495&end=617) · [sha256:0d244645b97c4b69…](/hashes/sha256:0d244645b97c4b6962a44ef57a77f063a10553c76bdf1acfe9fc5a6990dcba73)

### [fm2](/eurorack/makers/synthtech-com/e440/fm2) (1 record)

- **behavior** = The 12:00 (straight up) position is maximum attenuation: rotating CCW will add the inverted signal to the FREQUENCY control while rotating CW will add the applied CV. · as [e440 · fm2](/eurorack/makers/synthtech-com/e440/fm2) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=1518&end=1685) · [sha256:43ce33bf5bcd7125…](/hashes/sha256:43ce33bf5bcd71253b34e0456dcbac54486413742ba9b13821066a2e74c2f6ec)

### [resonance](/eurorack/makers/synthtech-com/e440/resonance) (1 record)

- **function** = amount of filter resonance · as [e440 · resonance](/eurorack/makers/synthtech-com/e440/resonance) · [quote](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c?trace&start=1113&end=1157) · [sha256:b2231618f28f7d16…](/hashes/sha256:b2231618f28f7d163d8deaafc256df62de33147c06ede2ef0508cd8b8670b9cd)

**Disagreement:** current-draw-negative-12v: 23 mA in https://synthtech.com/docs/E440_manual.pdf vs 12 mA in https://synthtech.com/eurorack/E440/

## Captures (2)

- 9 Sep 2026, 00:10 UTC · https://synthtech.com/docs/E440_manual.pdf · quotes only (no licence recorded) · 0 revisits · [text](/hashes/sha256:31eb373e4d528f26a9bf3acc9cd3c873b85020927912491391356a20ac69fa9c) (pdfium/7881, 3118 bytes) · capture [sha256:1aa33eac133d1b4f…](/hashes/sha256:1aa33eac133d1b4fcb09e338f22f492ff679767660d141f6b5804633aa0e675f)
- 9 Sep 2026, 00:10 UTC · https://synthtech.com/eurorack/E440/ · quotes only (no licence recorded) · 0 revisits · [text](/hashes/sha256:4a4ab89224bd2d1fc78f1c410663a6654c1b220bb0a05e65c1199e6518e8b675) (drillable-html-text/1, 1868 bytes) · capture [sha256:d0ee72056dd46079…](/hashes/sha256:d0ee72056dd46079df38425ffc1bd47f4faffcd10338eaf2e7ede845d4c27d2e)
4 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.

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