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pvsbin

Obtain the amp and freq values off a PVS signal bin as k-rate variables.

Syntax

kamp, kfr = pvsbin(fsig, kbin)

kamp, kfr pvsbin fsig, kbin

Performance

kamp -- bin amplitude

kfr -- bin frequency

fsig -- an input pv stream

kbin -- bin number

Examples

Here is an example of the pvsbin opcode. It uses the file pvsbin.csd. This example uses realtime input, but you can also use it for soundfile input.

Example of the pvsbin opcode
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<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 pvsbin.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

; by Richard Boulanger & Menno Knevel

sr = 44100
ksmps  = 1
nchnls = 2
0dbfs  = 1

instr 1

ifftsize = 1024
iwtype   = 1                                      
a1 diskin2 "fox.wav", 1
; to reduce artifacts, try a smaller hopsize, like ifftsize/8
; also using port on frequency and/or amplitude may smooth it if there spikes
fsig pvsanal a1, ifftsize, ifftsize/4, ifftsize, iwtype
kamp, kfr pvsbin fsig, p4

adm poscil3 kamp*4, kfr
outs adm, adm

endin

</CsInstruments>
<CsScore>
;           bin
i 1 0 2.7   15
i 1 3 .     35
i 1 6 .     65
i 1 9 .     95

i 1 13 2.7  15   ; chord
i 1 13 .    35
i 1 13 .    65
i 1 13 .    95
e
</CsScore>
</CsoundSynthesizer>

See also

Tools for Real-time Spectral Processing (pvs opcodes)

Credits

Author: Victor Lazzarini
August 2006