Filter not filtering much

Polymode is inspired by the groundbreaking Moog Polymoog synthesizer. One of the world’s first polyphonic synthesizers, its unique multiple parallel filter implementation and mod routings give it a sound like no other synth.
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Airlane1979
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Joined: Mon Nov 11, 2024 3:01 pm

Filter not filtering much

Post by Airlane1979 »

I'm a new user. I can't get the filter to act on the oscillators like I'd expect. For example on the 'Breathy Voice' preset, I turned up the Master Gain VCF to max and switched the Resonators to Low Pass. The VCF Frequency slider doesn't have much effect. At its minimum most of the high frequencies are still audible. Does the Polymode filter control just have a very narrow range of action? On every other synth with a low-pass filter, it's possible to remove all frequencies entirely. I'm confused.
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utdgrant
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Re: Filter not filtering much

Post by utdgrant »

The signal routing in Polymode can be quite confusing for a beginner. Here is a diagram from the manual:
ugPolymodeVST_SignalFlow3.jpg
ugPolymodeVST_SignalFlow3.jpg (39.53 KiB) Viewed 311 times
In order to hear the VCF in isolation, you need to set the "DIR", "MODE" and "RES" sliders to 0 and "VCF" to 10 in the Master Gain Mixer:
ugPolymodeVST_mastGain.jpg
ugPolymodeVST_mastGain.jpg (23.57 KiB) Viewed 311 times
Note that the Resonator filter settings will have no effect, as setting the "RES" slider to 0 takes it out of the equation.

Instead, use the "FREQ" slider in the VCF section to control cutoff.
ugPolymodeVST_VCF-1610755815.jpg
ugPolymodeVST_VCF-1610755815.jpg (29.74 KiB) Viewed 311 times
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utdgrant
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Re: Filter not filtering much

Post by utdgrant »

Airlane1979 wrote: Mon Nov 11, 2024 3:12 pm I'm a new user.
Welcome aboard the forum!

I'm guessing from your user name that one of the first Polymode presets you tried was "Vox Humana - Direct". :lol:
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Airlane1979
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Re: Filter not filtering much

Post by Airlane1979 »

utdgrant wrote: Mon Nov 11, 2024 4:09 pm
Airlane1979 wrote: Mon Nov 11, 2024 3:12 pm I'm a new user.
Welcome aboard the forum!

I'm guessing from your user name that one of the first Polymode presets you tried was "Vox Humana - Direct". :lol:
Well, yes, exactly. My only previous experience with this unusual synth was encountering one in a music store maybe twenty years ago where the kind shop assistants permitted me a few minutes playing Are 'Friends' Electric, Cars, Metal, Airlane and so on... Your advice solved the problem, I understand the signal flow rather better now. Thank you! :D
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utdgrant
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Re: Filter not filtering much

Post by utdgrant »

Airlane1979 wrote: Mon Nov 11, 2024 4:40 pm My only previous experience with this unusual synth was encountering one in a music store maybe twenty years ago where the kind shop assistants permitted me a few minutes playing Are 'Friends' Electric, Cars, Metal, Airlane and so on...
Funnily enough, I used the "Airlane" intro to do a Vox Humana shootout video a couple of years ago.

I also used it to demo the "Aeromint" preset on the Stringer Seventy Six bundle for Voltage Modular.
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