preenfm Forum

PreenFM => preenfm2 and preenfm3 => Topic started by: lokki on August 08, 2017, 11:18:05 PM

Title: 2 filters in parallel
Post by: lokki on August 08, 2017, 11:18:05 PM

hi xavier,

would it be possible (codesizewise) to have two filters in parallel (not serial) at the output stage? the second one could just be fixed to bandpass mode. if you set first filter to lowpass and second to bandpass you can get formant vowel sounds, which work well with fm sounds.

Title: Re: 2 filters in parallel
Post by: Xavier on August 09, 2017, 11:05:01 AM

Hi,

That would require some changes, but why not..
The FX are implemented here :
https://github.com/Ixox/preenfm2/blob/master/src/synth/Timbre.cpp#L491

A solution that should work without modification, is to have all instruments with same preset and listening to the same midi channel.
Set a different filter for each instrument.
You'll get 4 filters in parallel, but with limited polyphony.

Xavier

Title: Re: 2 filters in parallel
Post by: opus.quatre on September 23, 2017, 11:01:01 AM

Hi again Lokki and Xavier and the rest of the world..

Concerning the existing filter, and especially in "bandpass" mode, I believe it would be very good to have a "direct volume", or "dry volume" control.. Or a balance "dry/wet" so that we could mix part . well why should I explain, you understood why..

When I use the FMsynth on Caustic, with an electric piano preset, I often add one or more "multifilter" in "Band Isolate" mode, which is a band pass+dry filter, the "Gain" button being in fact a mixer/balance..

The filter in Preenfm2 is a presently 3 parameter module, so there is one vacant place on the display, and one vacant encoder, which could be used for this purpose..

Have a nice day..
Thierry