;Written by Iain McCurdy, 2010

;Modified for QuteCsound by René, October 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)


;TABLES FOR EXP SLIDER
giExp8			ftgen	0, 0, 129, -25, 0, 0.001, 128,     8.0
giExp10000		ftgen	0, 0, 129, -25, 0,   1.0, 128, 10000.0
giExp20000		ftgen	0, 0, 129, -25, 0,  20.0, 128, 20000.0


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
		gkstor	invalue	"Store"
		kcf		invalue	"Frequency"
		gkcf		tablei	kcf, giExp20000, 1
				outvalue	"Frequency_Value", gkcf
		kbw		invalue	"Bandwidth"
		gkbw		tablei	kbw, giExp10000, 1
				outvalue	"Bandwidth_Value", gkbw
		kgain	invalue	"Gain"
		gkgain	tablei	kgain, giExp8, 1
				outvalue	"Gain_Value", gkgain
		gkamp	invalue	"Amplitude"

		Sfile_new		strcpy	""									;INIT TO EMPTY STRING
		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									;CREATE A VARIABLE FUNCTION THAT RAPIDLY RAMPS UP TO A SET VALUE	
	kcf		portk	gkcf, 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 'NEW_FILE'
	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

	ktrig	changed	gkstor
	if ktrig=1 then
		reinit	UPDATE
	endif

	UPDATE:
	aresL	eqfil	asigL, kcf, gkbw, gkgain, i(gkstor)
	aresR	eqfil	asigR, kcf, gkbw, gkgain, i(gkstor)
			rireturn
			outs		aresL * gkamp , aresR * gkamp						;SEND FILTER OUTPUT TO THE AUDIO OUTPUTS
endin
</CsInstruments>
<CsScore>
;INSTR | START | DURATION
i  1      0       3600		;GUI PLAYS FOR 1 HOUR
</CsScore>
</CsoundSynthesizer>


<bsbPanel>
 <label>Widgets</label>
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  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>eqfil</label>
  <alignment>center</alignment>
  <font>Liberation Sans</font>
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  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>eqfil</label>
  <alignment>center</alignment>
  <font>Liberation Sans</font>
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  <color>
   <r>0</r>
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   <r>106</r>
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  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>-------------------------------------------------------------------------------
eqfil is an implementation of a 2nd order tunable equalization filter with controls for centre frequency, bandwidth, and gain.</label>
  <alignment>left</alignment>
  <font>Liberation Sans</font>
  <fontsize>14</fontsize>
  <precision>3</precision>
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   <r>0</r>
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   <g>255</g>
   <b>255</b>
  </bgcolor>
  <bordermode>noborder</bordermode>
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  <borderwidth>1</borderwidth>
 </bsbObject>
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  <objectName/>
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  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <type>event</type>
  <pressedValue>1.00000000</pressedValue>
  <stringvalue/>
  <text>  ON / OFF</text>
  <image>/</image>
  <eventLine>i 2 0 -1</eventLine>
  <latch>true</latch>
  <latched>false</latched>
 </bsbObject>
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  <objectName>Frequency_Value</objectName>
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  <font>Liberation Sans</font>
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  <precision>3</precision>
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   <r>0</r>
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  <bordermode>noborder</bordermode>
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  <objectName>Frequency</objectName>
  <x>8</x>
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  <maximum>1.00000000</maximum>
  <value>0.53400000</value>
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  <mouseControl act="jump">continuous</mouseControl>
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  <randomizable group="0">false</randomizable>
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  <visible>true</visible>
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  <label>Cutoff Frequency</label>
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   <r>0</r>
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  </bgcolor>
  <bordermode>noborder</bordermode>
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  <borderwidth>1</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBButton">
  <objectName>_Browse</objectName>
  <x>8</x>
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  <width>170</width>
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  <uuid>{b9431a61-61f7-432b-bf6f-c47ddc7f9050}</uuid>
  <visible>true</visible>
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  <midicc>0</midicc>
  <type>value</type>
  <pressedValue>1.00000000</pressedValue>
  <stringvalue>Seashore.wav</stringvalue>
  <text>Browse Audio File</text>
  <image>/</image>
  <eventLine/>
  <latch>false</latch>
  <latched>false</latched>
 </bsbObject>
 <bsbObject version="2" type="BSBLineEdit">
  <objectName>_Browse</objectName>
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 </bsbObject>
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   <b>255</b>
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 </bsbObject>
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  <font>Arial</font>
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  <precision>3</precision>
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   <r>0</r>
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   <b>0</b>
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   <g>255</g>
   <b>255</b>
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  <text> Store Internal Space</text>
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  <value>0.77000000</value>
  <mode>lin</mode>
  <mouseControl act="jump">continuous</mouseControl>
  <resolution>-1.00000000</resolution>
  <randomizable group="0">false</randomizable>
 </bsbObject>
 <bsbObject version="2" type="BSBDisplay">
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  <alignment>right</alignment>
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  <color>
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  </color>
  <bgcolor mode="nobackground">
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  </bgcolor>
  <bordermode>noborder</bordermode>
  <borderradius>1</borderradius>
  <borderwidth>1</borderwidth>
 </bsbObject>
</bsbPanel>
<bsbPresets>
</bsbPresets>
<EventPanel name="" tempo="60.00000000" loop="8.00000000" x="913" y="162" width="655" height="346" visible="true" loopStart="0" loopEnd="0">    </EventPanel>
