RMS

Extension

Description

2016, Till Bovermann http://tai-studio.org

calculates root mean square of 1st order low-pass filtered input for each sample.rms = sqrt(lpf1(x^2))

Class Methods

.kr

.ar

Examples

Simple example// analyse a signal { var sig, rms; sig = SinOsc.ar(300, 0, MouseX.kr(0, 1)) * LFPulse.ar(1, 0.5); rms = RMS.ar(sig, 10).poll; [sig, rms] }.scope;

More complex usage example adapted from a Pd patch by Dario Sanfilippo// Feedback delay modulation ( Ndef(\fb).addSpec(\modScale, [-20, 20, \lin, 1]); Ndef(\fb).addSpec(\gain, [0, 2, \lin, 0]); Ndef(\fb).addSpec(\amp, [0, 2, \lin, 0]); Ndef(\fb).addSpec(\limit, [0, 1, \lin, 0]); Ndef(\fb).addSpec(\lookahead, [0, 1, \lin, 0]); Ndef(\fb).addSpec(\lpf, [0.01, 4, \exp, 0]); Ndef(\fb, { // var in = SoundIn.ar([0, 1]) * \gain.kr(0); var in = SoundIn.ar(0) * \gain.kr(0); var rms = RMS.ar(in, \lpf.kr(0.01)); // var rms = Amplitude.ar(in, 2, 2); // var rms = EnvFollow.ar(in, 0.2); var snd = DelayC.ar(in, 1, 0.5 + LeakDC.ar(rms, 0.9998) * \modScale.kr(0)); ////////////////// // AGC2.1 ( a limiter) var rms500 = RMS.ar(snd, 500); var rms1 = RMS.ar(snd, 1) * 2; var analytics = max(rms500 - rms1, 0) + rms1; snd = (DelayC.ar(snd, 0.02, \lookahead.kr(0) * 0.02) / max(analytics / \limit.kr(0), 1)).clip2(1, 1); // the standard SC limiter // snd = Limiter.ar(snd, \limit.kr(0), \lookahead.kr(0)).sum * \amp.kr(0) snd * \amp.kr(0.1) }) ) ProxyMeter.addMixer(NdefMixer(s));