Resonant lowpass filter lores~ implements an inexpensive lowpass with an adjustment that lets you add a specified resonance. The middle inlet sets a kind of cutoff frequency, but the sharpness of the filter depends on the resonance passed in through the right inlet (0 is a little bit sharp and 1 as sharp as possible). Cycling '74 MSP MSP Filters (signal) Input TEXT_HERE (signal/float) Cutoff Frequency sets the cutoff frequency of the filter (signal/float) Resonance Control (0-1) sets the resonance value of the filter (signal) Output TEXT_HERE Set the filter cutoff A number sets the initial cutoff frequency. The default value is 0. If a signal is connected to the inlet, the argument corresponding to the inlet is ignored. Set the filter resonance A number sets the filter resonance. The default value is 0. If a signal is connected to the inlet, the argument corresponding to the inlet is ignored. A resonance of 0 is a little bit sharp and 1 is as sharp as possible. Function depends on inlet An int can be sent in the middle or right inlets to change the cutoff frequency or resonance. If a signal is connected one of the inlets, a number received in that inlet is ignored. A resonance of 0 is a little bit sharp and 1 is as sharp as possible. Function depends on inlet float can be sent in the middle or right inlets to change the cutoff frequency or resonance. If a signal is connected one of the inlets, a number received in that inlet is ignored. A resonance of 0 is a little bit sharp and 1 is as sharp as possible. Clear the filter memory Clears the filter's memory. Since lores~ is a recursive filter, this message may be necessary to recover from blowups. Function depends on inlet In left inlet: Any signal to be filtered.

In middle inlet: Sets the lowpass filter cutoff frequency.

In right inlet: Sets a "resonance factor" between 0 (minimum resonance) and 1 (maximum resonance). Values very close to 1 may produce clipping with certain types of input signals. Sets the initial cutoff frequency. Sets the filter resonance. A resonance of 0 is a little bit sharp and 1 is as sharp as possible. The filtered input signal. The equation of the filter is

yn = scale * xn - c1 * yn-1 + c2 * yn-2

where scale, c1, and c2 are parameters calculated from the cutoff frequency and resonance factor.