pvslock
pvslock — Frequency lock an input fsig
Description
This opcode searches for spectral peaks and then locks the frequencies around those peaks. This is similar to phase-locking in non-streaming PV processing. It can be used to improve timestretching and pitch-shifting quality in PV processing.
Performance
fsig -- output pv stream
fsigin -- input pv stream.
klock -- frequency lock, 1 -> lock, 0 -> unlock (bypass).
![[Warning]](images/warning.png)
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Warning |
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It is unsafe to use the same f-variable for both input and output of pvs opcodes. Using the same one might lead to undefined behavior on some opcodes. Use a different one on the left and right sides of the opcode. |
Examples
Here is an example of the pvslock opcode. It uses the file pvslock.csd.
Example 704. Example of the pvslock 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 ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o pvslock.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 gifil ftgen 0, 0, 0, 1, "fox.wav", 0, 0, 1 instr 1 klock = p4 fsig pvstanal 1, 1, 1, gifil ; no further transformations fsigout pvslock fsig, klock ; lock frequency aout pvsynth fsigout outs aout, aout endin </CsInstruments> <CsScore> i 1 0 2.6 1 ; locked i 1 3 2.6 0 ; not locked e </CsScore> </CsoundSynthesizer>