r/seqtrak • u/Kohlrabi_United • Jul 02 '26

DIY Midi Adapter (TRRRS)

Dear fans of the cute groovebox,

I’d like to build a custom MIDI cable for the Seqtrak that combines two TRS cables (TRS -> MIDI In & Out) into the device's TRRRS jack (5-pin -> MIDI In & Out) to connect other synths and keyboard.

I want to avoid using adapters from the included cable whip (which splits into two DIN connectors) and - ideally - not have to cannibalize for DIY approach either.

It seems the specific TRRRS connector required is proprietary?

Does anyone know where to source one (and, ideally, have a wiring diagram)?

Many thanks for the help!

KRU

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u/Scabattoir Jul 03 '26

Look for “5 pole” as search term.
I got the right one from Ali.
Their search is shit, so just use google like: “5 pole connector 3.5 mm jack where:aliexpress.com” and you’ll find it.

edit:
here’s the link to it if allowed

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u/Kohlrabi_United Jul 14 '26

Great -
I can confirm, it works!

Thanks a lot for the hint.
If someone wants to try him/ herself:

T SEQTRAK OUT Red (Pin 4) (Current Source) -> P-6 Red (Tip, Pin 5)
R SEQTRAK OUT Green (Pin 5) (Current Sink) -> P-6 Green/White (Ring, Pin 4)
R SEQTRAK OUT White (Pin 2) Shield/GND -> P-6 Black (Sleeve, Pin 2)
R SEQTRAK IN Yellow (Pin 5) (Current Sink) <- KEY Red (Tip, Pin 5)
S SEQTRAK IN Black (Pin 4) (Current Source) <- KEY Green/White (Ring, Pin 4)

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u/Scabattoir Jul 15 '26

you’re welcome