linuxaudio.org

On 11/03/11 06:17, Q wrote:

quoted text
> Hello

>

> I'm looking for a resonant filter that's switchable between lowpass,

> bandpass and highpass and which has a traditional ADSR envelope

> controlling it. I'm wanting something that can be used in JACK Rack or

> something like that, or which could be used as a plugin in Ardour, in

> order to process incoming audio in real time.

>

> There are plenty of LADSPA filter plugins, but they all seem to be

> either static or swept by an LFO or similar. I thought someone, at some

> point, might have made a filter and envelope triggered by an incoming

> signal, in the way that a synth's filter does.

>

> It looks like all the building blocks are probably there in various

> LADSPA plugins, but I can't figure out how you'd connect them together.

AlsaModularSynth could probably do exactly that. However, I'd also look

at PHASEX -- it's a synth, but like many hardware synths it has the

ability to turn off its oscillators and process an external signal (from

a JACK port) through its filters, using its envelopes and LFOs for

modulation.
> I'd also consider a hardware solution (but only a cheap one, as finances

quoted text
> are very tight at the moment) and in some ways it would have some

> advantages. I thought there was bound to be a guitar stompbox that would

> do that (and no doubt a cheap Behringer knock-off version as well!), but

> so far I've not turned up anything suitable.

Nothing cheap that I know of, but Moog's MF-101 does fit the bill, if

only for a low-pass filter:
http://www.moogmusic.com/moogerfooger/?section=product&product_id=5
Thanks

Leigh

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