# Doepfer A-128

drillable.com › eurorack › makers › doepfer-de › a-128.
As of the capture of 9 Sep 2026; the index built 17 Sep 2026, 21:11 UTC · [cites, never asserts](/standing).
Source: https://doepfer.de/a100_man/A128_man.pdf · quotes only, no licence recorded.
Search `/eurorack/makers/doepfer-de/a-128?q=…` · MCP https://mcp.drillable.com · [html](/eurorack/makers/doepfer-de/a-128?format=html) · [markdown](/eurorack/makers/doepfer-de/a-128?format=md) · [json](/eurorack/makers/doepfer-de/a-128?format=json) · [discovery](/.well-known/drillable.json) · [guide](/llms.txt)

## Records read from it (10)

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

### [a 128](/eurorack/makers/doepfer-de/a-128) (4 records)

- **type** = filter bank · as [a 128 · a 128](/eurorack/makers/doepfer-de/a-128) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=65&end=115) · [sha256:72ee826feeec82da…](/hashes/sha256:72ee826feeec82daa0f4ac1d3a49f84ad9ab50cb9e66812aadc65814ad436462)
- **compatibility** = external signals that can be patched in via an A-119 module · as [a 128 · a 128](/eurorack/makers/doepfer-de/a-128) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=2010&end=2079) · [sha256:55be0f8297064a0b…](/hashes/sha256:55be0f8297064a0b0d28699377e51665b0486f31787d7182290c2ac5f91d8d3b)
- **function** = similar to an equalizer, except that an equalizer can also boost frequency bands, while the fixed filter bank only attenuates them · as [a 128 · a 128](/eurorack/makers/doepfer-de/a-128) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=2121&end=2260) · [sha256:1efb9c7d0f62c56c…](/hashes/sha256:1efb9c7d0f62c56c25b36bdbe70197ef8b4fc1532679ba852bbb62777ed808e3)
- **effect** = drastic tonal changes are possible - for instance 'telephone-voice' or vocoder-like effects · as [a 128 · a 128](/eurorack/makers/doepfer-de/a-128) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=2349&end=2445) · [sha256:8500fbfbf59ff383…](/hashes/sha256:8500fbfbf59ff383df91820220496c1abc4305420babe23c0f0d485a5b5210f8)

### [audio in](/eurorack/makers/doepfer-de/a-128/audio-in) (2 records)

- **function** = Signal input · as [a 128 · audio in](/eurorack/makers/doepfer-de/a-128/audio-in) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=1023&end=1046) · [sha256:c2cb78ae5160779f…](/hashes/sha256:c2cb78ae5160779f3bc26074f60087b3e8c58f5890f5f055e2fbe781ab0b45e1)
- **description** = the filter bank's input, into which you patch the signal you want filtered · as [a 128 · audio in](/eurorack/makers/doepfer-de/a-128/audio-in) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=1556&end=1645) · [sha256:a77e55c8dcadf6d7…](/hashes/sha256:a77e55c8dcadf6d72075c160499531f1bdb82bc9360601c6df921dd1a1a8b75f)

### [audio out](/eurorack/makers/doepfer-de/a-128/audio-out) (2 records)

- **function** = Signal output · as [a 128 · audio out](/eurorack/makers/doepfer-de/a-128/audio-out) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=1049&end=1074) · [sha256:c10709854b73e923…](/hashes/sha256:c10709854b73e923f004fa3dbe54b331335cdcf055b46e9786a908bf1966c538)
- **description** = carries the signal filtered by the 15 band pass filters · as [a 128 · audio out](/eurorack/makers/doepfer-de/a-128/audio-out) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=1658&end=1723) · [sha256:10f2da82e265f290…](/hashes/sha256:10f2da82e265f290363ab2f22d79230bbe076a6c383b75061ea5bd20ab296b51)

### [a 128 multiband eq patch](/eurorack/makers/doepfer-de/a-128/a-128-multiband-eq-patch) (1 record)

- **formula** = Audio Out = - In 1 • filter signal + In 2 • filter signal + In 3 • original signal · as [a 128 · a 128 multiband eq patch](/eurorack/makers/doepfer-de/a-128/a-128-multiband-eq-patch) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=3844&end=3932) · [sha256:222a0319293a7a7e…](/hashes/sha256:222a0319293a7a7e39a28fa5e4597dbc5507081d01904f7bc0798df27bea07b9)

### [band pass filter](/eurorack/makers/doepfer-de/a-128/band-pass-filter) (1 record)

- **bandwidth** = approximately half an octave · as [a 128 · band pass filter](/eurorack/makers/doepfer-de/a-128/band-pass-filter) · [quote](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786?trace&start=427&end=496) · [sha256:f111b644d9264083…](/hashes/sha256:f111b644d92640832d18743451ebeafac41cae639db23b43bd2775d9dd091233)

## Captures (1)

- 9 Sep 2026, 00:05 UTC · https://doepfer.de/a100_man/A128_man.pdf · quotes only (no licence recorded) · 0 revisits · [text](/hashes/sha256:0c6375369fd68b733b4b9897e503b0898d97eba14016a038043f5ec4723a0786) (pdfium/7881, 5100 bytes), [older text](/hashes/sha256:fbfa5ad7d9aa0afe439ec4ff3883acc4cb92b62cb67c40d674320c9aa1d4642d) (pdfium/7881, 12 bytes) · capture [sha256:e4b5ba0980aaf4ee…](/hashes/sha256:e4b5ba0980aaf4ee4877b335d5fcaf17f16f5060496651c80c485a90534e5f11)

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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