;Written by Iain McCurdy, 2006

;Modified for QuteCsound by René, November 2010, updated Feb 2011
;Tested on Ubuntu 10.04 with csound-float 5.13.0 and QuteCsound svn rev 817

;Notes on modifications from original csd:
;	Add table(s) for exp slider
;	Add Browser for audio file and use of FilePlay2 udo, now accept mono or stereo wav files


;my flags on Ubuntu: -iadc -odac -b1024 -B2048 -+rtaudio=alsa -+rtmidi=null -m0
<CsoundSynthesizer>
<CsOptions>
--env:SSDIR+=../SourceMaterials
</CsOptions>
<CsInstruments>
sr 		= 44100	;SAMPLE RATE
ksmps 	= 100	;NUMBER OF AUDIO SAMPLES IN EACH CONTROL CYCLE
nchnls	= 2		;NUMBER OF CHANNELS (2=STEREO)


giExp20000	ftgen	0, 0, 129, -25, 0, 20.0, 128, 20000.0		;TABLE FOR EXP SLIDER


opcode FilePlay2, aa, Skoo		; Credit to Joachim Heintz
	;gives stereo output regardless your soundfile is mono or stereo
	Sfil, kspeed, iskip, iloop	xin
	ichn		filenchnls	Sfil
	if ichn == 1 then
		aL		diskin2	Sfil, kspeed, iskip, iloop
		aR		=		aL
	else
		aL, aR	diskin2	Sfil, kspeed, iskip, iloop
	endif
		xout		aL, aR
endop


instr	1	;GUI
	ktrig	metro	10
	if (ktrig == 1)	then

		Sfile_new		strcpy	""							;INIT TO EMPTY STRING

		kfco			invalue	"Filter_Cutoff"
		gkfco		tablei	kfco, giExp20000, 1
					outvalue	"Filter_Cutoff_Value", gkfco
		gkgain		invalue	"Amplitude"

		gknumlayer	invalue	"Layers"
		gkskip		invalue	"Initialisation"

		gSfile		invalue	"_Browse"
		Sfile_old		strcpyk	Sfile_new
		Sfile_new		strcpyk	gSfile
		gkfile 		strcmpk	Sfile_new, Sfile_old
	endif
endin

instr	2
	kporttime		linseg	0,0.001,0.005,1,0.005										;CREATE A VARIABLE FUNCTION THAT RAPIDLY RAMPS UP TO A SET VALUE	
	kfco			portk	gkfco, kporttime											;SMOOTH MOVEMENT OF SLIDER VARIABLE

	kNew_file		changed	gkfile													;GENERATE A MOMENTARY '1' PULSE IN OUTPUT 'kSwitch' IF ANY OF THE SCANNED INPUT VARIABLES CHANGE. (OUTPUT 'kSwitch' IS NORMALLY ZERO)
	if	kNew_file=1	then															;IF I-RATE VARIABLE CHANGE TRIGGER IS '1'...
		reinit	NEW_FILE															;BEGIN A REINITIALISATION PASS FROM LABEL 'START'
	endif
	NEW_FILE:
	;OUTPUTS		OPCODE	FILE  | SPEED | INSKIP | LOOPING (0=OFF 1=ON)
	asigL, asigR	FilePlay2	gSfile,  1,      0,         1									;GENERATE 2 AUDIO SIGNALS FROM A STEREO SOUND FILE
				rireturn															;RETURN FROM REINITIALISATION PASS TO PERFORMANCE TIME PASSES

	kSwitch		changed	gkskip, gknumlayer											;GENERATE A MOMENTARY '1' PULSE IN OUTPUT 'kSwitch' IF ANY OF THE SCANNED INPUT VARIABLES CHANGE. (OUTPUT 'kSwitch' IS NORMALLY ZERO)	
	if	kSwitch=1	then																;IF I-RATE VARIABLE CHANGE TRIGGER IS '1'...
		reinit	START															;BEGIN A REINITIALISATION PASS FROM LABEL 'START'
	endif
	START:
	aresL 		tonex	asigL, kfco , i(gknumlayer), i(gkskip)							;FILTER BOTH CHANNELS SEPARATELY
	aresR 		tonex	asigR, kfco , i(gknumlayer), i(gkskip)							;FILTER BOTH CHANNELS SEPARATELY
				rireturn															;RETURN FROM REINITIALISATION PASS TO PERFORMANCE TIME PASSES
				outs		aresL * gkgain, aresR * gkgain								;SEND FILTER OUTPUT TO THE AUDIO OUTPUTS, RESCALE USING SLIDER VARIABLE gkgain
endin
</CsInstruments>
<CsScore>
;INSTR | START | DURATION
i 1		0	   3600		;GUI
</CsScore>
</CsoundSynthesizer>



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  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>tonex</label>
  <alignment>center</alignment>
  <font>Liberation Sans</font>
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  <visible>true</visible>
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  <label>tonex</label>
  <alignment>center</alignment>
  <font>Liberation Sans</font>
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   <r>0</r>
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  <label>----------------------------------------------------------------------------------------------------
tonex is an implementation of a second-order low-pass filter. Its input arguments are for cutoff frequency (half-power point) and a counter selecting the number of series iterations of the low-pass filter it implements. The effect of this is the same as the effect of multiple serially connected tone filters. However, use of the tonex opcode will be computationally much more efficient.</label>
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  <type>event</type>
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  <stringvalue/>
  <text>  ON / OFF</text>
  <image>/</image>
  <eventLine>i 2 0 -1</eventLine>
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  <bordermode>noborder</bordermode>
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  <objectName>Filter_Cutoff</objectName>
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  <maximum>1.00000000</maximum>
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  <mode>lin</mode>
  <mouseControl act="jump">continuous</mouseControl>
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  <alignment>left</alignment>
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   <r>0</r>
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   <b>255</b>
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  <bordermode>noborder</bordermode>
  <borderradius>1</borderradius>
  <borderwidth>1</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBHSlider">
  <objectName>Amplitude</objectName>
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  <mouseControl act="jump">continuous</mouseControl>
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  <font>Arial</font>
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   <g>255</g>
   <b>255</b>
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  <bordermode>noborder</bordermode>
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  <borderwidth>1</borderwidth>
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  <midicc>0</midicc>
  <type>value</type>
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  <stringvalue/>
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  <image>/</image>
  <eventLine/>
  <latch>true</latch>
  <latched>false</latched>
 </bsbObject>
 <bsbObject version="2" type="BSBButton">
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  <text>Browse Audio File</text>
  <image>/</image>
  <eventLine/>
  <latch>false</latch>
  <latched>false</latched>
 </bsbObject>
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  <label>Output Amplitude Scaling</label>
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<bsbPresets>
</bsbPresets>
<EventPanel name="" tempo="60.00000000" loop="8.00000000" x="913" y="162" width="655" height="346" visible="false" loopStart="0" loopEnd="0">    </EventPanel>
