ATSsinnoi
Prev | Orchestra Opcodes and Operators | Next

## ATSsinnoi

ATSsinnoi — uses the data from an ATS analysis file to perform resynthesis.

## Description

ATSsinnoi reads data from an ATS data file and uses the information to synthesize sines and noise together.

## Syntax

    ar ATSsinnoi ktimepnt, ksinlev, knzlev, kfmod, iatsfile, ipartials \
              [, ipartialoffset, ipartialincr]

## Initialization

iatsfile – the ATS number (n in ats.n) or the name in quotes of the analysis file made using ATS.

ipartials – number of partials that will be used in the resynthesis (the noise has a maximum of 25 bands)

ipartialoffset (optional) – is the first partial used (defaults to 0).

ipartialincr (optional) – sets an increment by which these synthesis opcodes counts up from ipartialoffset for ibins components in the re-synthesis (defaults to 1).

## Performance

ktimepnt – The time pointer in seconds used to index the ATS file. Used for ATSsinnoi exactly the same as for pvoc.

ksinlev - controls the level of the sines in the ATSsinnoi ugen. A value of 1 gives full volume sinewaves.

knzlev - controls the level of the noise components in the ATSsinnoi ugen. A value of 1 gives full volume noise.

kfmod – an input for performing pitch transposition or frequency modulation on all of the synthesized partials, if no fm or pitch change is desired then use a 1 for this value.

ATSsinnoi reads data from an ATS data file and uses the information to synthesize sines and noise together. The noise energy for each band is distributed equally among each partial that falls in that band. Each partial is then synthesized, along with that partial's noise component. Each noise component is then modulated by the corresponding partial to be put in the correct place in the frequency spectrum. The level of the noise and the partials are individually controllable. See the ATS webpage for more info about the sinnoi synthesis. An ATS analysis differs from a pvanal in that ATS tracks the partials and computes the noise energy of the sound being analyzed. For more info about ATS analysis read Juan Pampin's description on the the ATS web-page.

## Examples

      ktime   line       0, p3, 2.5
      asig    ATSsinnoi  ktime, 1, 1, 1, "beats.ats", 42

Here we synthesize both the noise and the sinewaves (all 42 partials) contained in "beats.ats" together. The relative volumes of the noise and the partials are unaltered (each set to 1).

Here is another example of the ATSsinnoi opcode. It uses the file ATSsinnoi.csd.

Example 78. Example of the ATSsinnoi opcode.

    <CsoundSynthesizer>
    <CsOptions>
    ; Select audio/midi flags here according to platform
    -odac     ;;;RT audio out
    ;-iadc    ;;;uncomment -iadc if RT audio input is needed too
    ; For Non-realtime ouput leave only the line below:
    ; -o ATSsinnoi.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    sr = 44100
    ksmps = 32
    nchnls = 2
    0dbfs = 1

    instr 1	; "beats.ats" is created by atsa

    ktime	line	0,  p3, 2
    knzfade	expon	0.001, p3, 2
    aout	ATSsinnoi 	ktime, 1, knzfade, 1, "beats.ats", 150
    	outs	aout*2, aout*2		;amplify some more
    endin

    </CsInstruments>
    <CsScore>

    i 1 0 2
    e

    </CsScore>
    </CsoundSynthesizer>

This example here is like the other example except that we use an envelope to control knzlev (the noise level). The result of this will be the "beats.wav" sound that has its noise component fade in over the duration of the note.

Here is another example of the ATSsinnoi opcode. It uses the file ATSsinnoi-2.csd.

Example 79. Example 2 of the ATSsinnoi opcode.

    <CsoundSynthesizer>
    <CsOptions>
    -odac -d -m128
    </CsOptions>
    <CsInstruments>
    ;example by joachim heintz
    sr = 44100
    ksmps = 32
    nchnls = 2
    0dbfs = 1

    giSine    ftgen     0, 0, 1024, 10, 1
    gSfile    =         "fox.ats"
    giNumParts ATSinfo  gSfile, 3 ;overall number of partials
    giDur     ATSinfo   gSfile, 7 ;duration
              seed      0

      instr PlayList
    event_i "i", "PlayAll", 0, 1, 1, 0, .5 ;sine only, half speed
    event_i "i", "PlayAll", giDur*2+1, 1, 0, 1, .5 ;noise only
    event_i "i", "PlayAll", giDur*4+2, 1, .5, .5, .5 ;half sine, half noise
      endin

      instr PlayAll
    iSinAmnt  =         p4 ;sinee amount (0-1)
    iNzAmnt   =         p5 ;noise amount (0-1)
    iSpeed    =         p6 ;speed
    p3        =         giDur/iSpeed
    ktime     line      0, giDur/iSpeed, giDur
              prints    "Resynthesizing all partials with tone = %.1f and noise = %.1f.\n", iSinAmnt, iNzAmnt
    aOut      ATSsinnoi ktime, iSinAmnt, iNzAmnt, 1, gSfile, giNumParts
              outs      aOut, aOut
      endin

      instr PlayBand
    iOffset   =         p4 ;offset in partials
    iSpeed    =         p5 ;speed
    p3        =         giDur/iSpeed
    ktime     line      0, giDur/iSpeed, giDur
              prints    "Resynthesizing partials %d to %d with related noise.\n", iOffset+1, iOffset+10
    aOut      ATSsinnoi ktime, 1, 1, 1, gSfile, 10, iOffset, 1
              outs      aOut, aOut
    ;call itself again
     if iOffset < giNumParts - 20 then
              event_i   "i", "PlayBand", giDur/iSpeed+1, 1, iOffset+10, iSpeed
     endif
      endin

      instr PlayWeighted
      ;sine amount, noise amount and speeed are varying
    kSinAmnt  randomi   0, 1, 1, 3
    kNzAmnt   =         1-kSinAmnt
    kSpeed    randomi   .01, .3, 1, 3
    async     init      0
    atime, aEnd syncphasor kSpeed/giDur, async
    kTrig     metro     100
    kEnd      max_k     aEnd, kTrig, 1 ;1 if phasor signal crosses zero
    ktime     downsamp  atime
    aOut      ATSsinnoi ktime*giDur, kSinAmnt, kNzAmnt, 1, gSfile, giNumParts
              outs      aOut, aOut
      ;exit if file is at the end
      if kEnd == 1 then
              event     "i", "End", 0, 1
      endif
      endin

      instr End
              exitnow
      endin

    </CsInstruments>
    <CsScore>
    i "PlayList" 0 1
    i "PlayBand" 20 1 0 .5
    i "PlayWeighted" 110 100
    </CsScore>
    </CsoundSynthesizer>

## See also

ATSread, ATSreadnz, ATSinfo, ATSbufread, ATScross, ATSinterpread, ATSpartialtap, ATSadd, ATSaddnz

## Credits

Author: Alex Norman
Seattle,Washington
2004

Prev | Up | Next
ATSpartialtap | Home | autocorr