MOTM-485 gx-1 vcf

synthesis technology MOTM-485 gx-1 vcf (MOTM485MASTER) by

MOTM-485 gx-1 vcf


Courtesy of Paul Schreiber, here is the link to the Synthesis Technology User Guide:'s%20Guide.pdf

The MOTM-485 is a recreation of the Yamaha GX-1 LP/HP filter.

The GX-1 was a massive organ/synth hybrid, costing over $60,000 in the late ‘70s. The best example is the ELP song ‘Pirates’, but was also used by Stevie Wonder and Led Zepplin..

The actual GX-1 used a pair of these filters to form a bandpass response (the same method used in the MS-20 and the CS-80).
There is a HP filter set to "half tracking" followed by a LP at "full" tracking. However, you can still use a single MOTM-485 as yet another distinct tone in your setup.

Faithfully captures the unique GX-1 timbre

2 audio inputs

Voltage-controlled resonance

Switchable HP/LP response

Switchable half/full tracking of the 1V/Oct input

Fully temperature compensated using TEMPCO resistor and matched pairs

Not a ‘clean’ filter: has higher distortion than other MOTM filters

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Tags: synthesis technology, motm, schreiber, panel, motm motm-485, gx-1, vcf, only, panels analog, metropolis panst0485motm10 motm485master diy, modular