Hi, Fons! ======= On Monday 12 March 2007, you wrote: ======= > On Mon, Mar 12, 2007 at 12:53:28AM +0300, Andrew Gaydenko wrote: > > > Will anybody find a minute ot two to explain me how does the plugin > > work - I mean a user POV rather technical realization details. > > (Assuming you mean my plugin from the MCP package) > > This is an emulation of an analog phase delay line phaser. > > "Input gain (dB)" Just what is says it is... > > "Sections", The number (1..30) of first-order allpass filters that > form the delay line. The phase shift of each section is zero at LF > and goes up to 180 degrees at HF. > > "Frequency", (in octaves) the frequency at which each filter section > produces 90 degrees phase shift. The range is 12 octaves. Halfway > is middle C. > > "LFO frequency (Hz)" Frequency of the LFO that modulates the "Frequency" > parameter above (0.01 to 30 Hz). > > "LFO waveform". Sets the waveform of the LFO, from falling saw, over > triangle, to rising saw. > > "Modulation gain", The amount of modulation by the LFO output. > > "Feedback gain". The gain (-1..1) of the feedback from the delay > line output back to the input. > > "Output mix". The first half crossfades between the inverted delay > output and the input, the second half between input and the normal > delay output. Mid position is input, i.e. no effect. > > > So if you set "Sections" to N, the phase shift in the delay line will > vary between 0 at LF and N/2 cycles at HF. The "Frequency" setting will > determine the shape of the phase curve and consequently the set of N/2 > frequencies where the delay output is in antiphase with the input. > Setting "Output mix" to +0.5 will produce nulls at these frequencies. > Setting it to -0.5 will produce maxima at these frequencies. "Feedback" > will modify the effect in complicated ways. Finally the LFO makes the > set of frequencies move up and down, producing the phasing effect. >
Thanks! I'll play with the plugin having your words in front of me :-) (have you found a chance to look at the qloud?) Andrew
