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TOPIC: How to apply Low pass filter based on fader

How to apply Low pass filter based on fader 9 months 3 weeks ago #1

  • batata004
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Hi,

When I move my pitch bend wheel of the vibrato wheel it affect the sound that is being played. I am wondering if I can do a similar thing but with Low pass filter? Can I use a knob or fader in my keyboard to contorl the LOW PASS FILTER of an instrument? Maybe using a modulator I can achieve this? If so, could you please give me an example?

Thanks a lot! You guys are awesome providing this app and support for it!
Last Edit: 9 months 3 weeks ago by batata004.
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How to apply Low pass filter based on fader 8 months 3 weeks ago #2

  • csw900
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If you are using fluidsynth you can use an NRPN to adjust the filter cutoff -
fluid_synth_cc(synth, i, 0x63, 120); //NRPN MSB sf2
fluid_synth_cc(synth, i, 0x62, 8); //NRPN LSB Select Filter cutoff
fluid_synth_cc(synth, i, 0x26, nrpndata & 0x7f); //NRPN DATA LSB cents
fluid_synth_cc(synth, i, 0x06, (nrpndata >> 7) & 0x7f); //NRPN DATA MSB

Dont ask me how it works but that is what I used in eplayOrgan. You may be able to use the CC directly.

csw900
csw900
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