max_k — Local maximum (or minimum) value of an incoming asig signal
max_k outputs the local maximum (or minimum) value of the incoming asig signal, checked in the time interval between ktrig has become true twice.
asig - incoming (input) signal
ktrig - trigger signal
max_k outputs the local maximum (or minimum) value of the incoming asig signal, checked in the time interval between ktrig has become true twice. itype determinates the behaviour of max_k:
1 - absolute maximum (sign of negative values is changed to positive before evaluation).
2 - actual maximum.
3 - actual minimum.
4 - calculate average value of asig in the time interval since the last trigger.
This opcode can be useful in several situations, for example to implement a vu-meter.
Here is an example of the max_k opcode. It uses the file max_k.csd.
Example 578. Example of the max_k opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;-Ma ;;;realtime audio out and midi in (on all inputs) ;-iadc ;;;uncomment -iadc if RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o max_k.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; by Stefano Cucchi 2020 sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 anoise noise 0.1, 0.1 ; generate some noise arandom randomi 400, 12000, 4 ; generate random numbers from 400 to 1200 ktrig metro 3 ; trigger signal kmin max_k arandom, ktrig, 3 ; minumum value kmax max_k arandom, ktrig, 2 ; maximum value printk 0.2, kmin printk 0.2, kmax anoisehp butterhp anoise, kmin ; hipass filter at kmin frequency anoiselp butterlp anoise, kmax*0.5 ; lopass filter at kmin/2 frequency acomp oscil 0.1, 440 ; comparator signal for consistent amplitude anoisehp balance anoisehp, acomp ; adjusting the volume anoiselp balance anoiselp, acomp ; adjusting the volume outs anoisehp, anoiselp endin </CsInstruments> <CsScore> i1 0 10 e </CsScore> </CsoundSynthesizer>