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MusicBrain VCF8-kern - 8x multimode VCF

MarkWestbroek·MusicBrain·hardware/schematics/musicbrain-vcf8kern/musicbrain-vcf8kern.kicad_pcb

MusicBrain VCF8-kern - 8x multimode VCF PCB layout, top view — open source board by MarkWestbroek

About the MusicBrain VCF8-kern - 8x multimode VCF PCB

MusicBrain VCF8-kern - 8x multimode VCF is an open source PCB design by MarkWestbroek, published on GitHub under the MIT license. It is a 4-layer board measuring 110 × 92 mm, with 412 components from 28 distinct parts.

Other key parts include the SSI2140, 74HC4051, TL074, AD5754BREZ and ADR421. By type, the board carries 299 resistors, 82 capacitors, 27 ICs, 3 connectors and 1 transistor.

It belongs with the audio designs in this gallery.

From the project

A central brain running on teensy or a lighter MCU to process any control signals (MIDI, CV, our own) into the same but adding logic, ADSRs, DCOs, CV matrices etc. to it

Kernkaart van het poly-analog-spoor (doc/poly-analog-spec.md, VCF8 + B3/B7/B10): 8 identieke SSI2140-stemmen met pole-mixing multimode (8 modes via een 4051 per stem), cutoff/Q vanuit de Brain via de SPI-bus. Staande kaart achter de VCF8-backbone (kernslot-contract v1.1). 110×92, 4-laags (In1/In2 = GND-planes), dubbelzijdig bestukt (besluit 2026-07-21: per stem gaat de pole-mix-ster + buffer-steun + ontkoppeling naar de B-zijde via JLC PCBA; de SSI2140's op de top soldeer je zelf), passieven 0603.

Main components on the MusicBrain VCF8-kern - 8x multimode VCF

SSI214074HC4051TL074AD5754BREZADR421DAC128S085CIMTXLM311

MusicBrain VCF8-kern - 8x multimode VCF bill of materials (BOM)

412 components, 28 distinct parts — part numbers from the project's BOM.

QtyPartRefs
8
SSI2140
U1, U2, U3, U4, U5, U6, U7, U8
9
74HC4051
U11, U12, U13, U14, U15, U16, U17, U18 +1
5
TL074
U21, U22, U23, U24, U25
2
AD5754BREZ
U31, U32
1
ADR421
U33
1
DAC128S085CIMTX
U34
1
LM311
U36
1
2N7002
Q1
1
KERNSLOT
J1
1
AUDIO IN
J2
1
AUDIO UIT
J3
32
1n
C101, C102, C103, C104, C201, C202, C203, C204 +24
45
100N
100n
C105, C106, C107, C205, C206, C207, C305, C306 +37
4
10U
10u
C911, C912, C913, C914
1
10N
10n
C915
72
15K
15k
R101, R102, R103, R104, R105, R106, R107, R108 +64
32
200R
R109, R110, R111, R112, R209, R210, R211, R212 +24
8
54.9K
54.9k
R113, R213, R313, R413, R513, R613, R713, R813
16
1k
R114, R118, R214, R218, R314, R318, R414, R418 +8
8
100K
100k
R115, R215, R315, R415, R515, R615, R715, R815
Show 8 more
QtyPartRefs
8
13K
13k
R116, R216, R316, R416, R516, R616, R716, R816
8
16.2K
16.2k
R117, R217, R317, R417, R517, R617, R717, R817
96
75K
75k
R119, R130, R131, R132, R133, R134, R136, R137 +88
8
18.7K
18.7k
R120, R220, R320, R420, R520, R620, R720, R820
8
60.4K
60.4k
R122, R222, R322, R422, R522, R622, R722, R822
32
37.4K
37.4k
R135, R140, R143, R144, R235, R240, R243, R244 +24
1
10K
10k
R901
2
1M
R902, R903

MusicBrain VCF8-kern - 8x multimode VCF design files

The KiCad project lives in the MarkWestbroek/MusicBrain repository on GitHub; these links point at the commit this page was built from.

MusicBrain VCF8-kern - 8x multimode VCF: common questions

How big is the MusicBrain VCF8-kern - 8x multimode VCF PCB?

The MusicBrain VCF8-kern - 8x multimode VCF measures 110 × 92 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the MusicBrain VCF8-kern - 8x multimode VCF?

412 components, from 28 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the MusicBrain VCF8-kern - 8x multimode VCF design files?

From the MarkWestbroek/MusicBrain repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the MusicBrain VCF8-kern - 8x multimode VCF design in my own project?

Yes, under the terms of its MIT license, which MarkWestbroek chose for the repository.

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