;Written by Iain McCurdy, 2009

;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)


;TABLES FOR EXP SLIDER
giExp10000	ftgen	0, 0, 129, -25, 0, 0.1, 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

		Sfile_new	strcpy	""						;INIT TO EMPTY STRING

		kcf			invalue 	"Filter_Cutoff"
		gkcf			tablei	kcf, giExp20000, 1
					outvalue	"Filter_Cutoff_Value", gkcf
		kbw			invalue 	"Bandwidth"
		gkbw			tablei	kbw, giExp10000, 1
					outvalue	"Bandwidth_Value", gkbw
		gkamp		invalue 	"Amplitude"

		gkopcode		invalue	"Opcode"
		gkskip		invalue	"Initialisation"
		gkscl		invalue	"Mode"

		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	
	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 '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	gkscl, gkskip									;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:
	if		gkopcode=0	then
		aresL	reson	asigL, kcf, gkbw , i(gkscl), i(gkskip)
		aresR	reson	asigR, kcf, gkbw , i(gkscl), i(gkskip)
	elseif	gkopcode=1	then
		aresL	resonr	asigL, kcf, gkbw , i(gkscl), i(gkskip)
		aresR	resonr	asigR, kcf, gkbw , i(gkscl), i(gkskip)
	elseif	gkopcode=2	then
		aresL	resonr	asigL, kcf, gkbw , i(gkscl), i(gkskip)
		aresR	resonr	asigR, kcf, gkbw , i(gkscl), i(gkskip)
	endif
				rireturn												;RETURN FROM REINITIALISATION PASS TO PERFORMANCE TIME PASSES
				outs		aresL * gkamp, aresR * gkamp						;SEND FILTER OUTPUT TO THE AUDIO OUTPUTS AND SCALE USING THE FLTK SLIDER VARIABLE gkamp
endin
</CsInstruments>
<CsScore>
;INSTR | START | DURATION
i 1		0	   3600		;GUI
</CsScore>
</CsoundSynthesizer>

<bsbPanel>
 <label>Widgets</label>
 <objectName/>
 <x>72</x>
 <y>179</y>
 <width>400</width>
 <height>200</height>
 <visible>true</visible>
 <uuid/>
 <bgcolor mode="background">
  <r>241</r>
  <g>226</g>
  <b>185</b>
 </bgcolor>
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  <objectName/>
  <x>2</x>
  <y>2</y>
  <width>511</width>
  <height>430</height>
  <uuid>{aa607456-d368-4d59-8497-d16d608404c3}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>reson resonr resonz</label>
  <alignment>center</alignment>
  <font>Liberation Sans</font>
  <fontsize>18</fontsize>
  <precision>3</precision>
  <color>
   <r>0</r>
   <g>0</g>
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  </color>
  <bgcolor mode="background">
   <r>106</r>
   <g>117</g>
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  </bgcolor>
  <bordermode>border</bordermode>
  <borderradius>5</borderradius>
  <borderwidth>2</borderwidth>
 </bsbObject>
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  <objectName/>
  <x>515</x>
  <y>2</y>
  <width>496</width>
  <height>430</height>
  <uuid>{74928ed2-b701-4668-9a11-74763d317e9b}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>reson resonr resonz</label>
  <alignment>center</alignment>
  <font>Liberation Sans</font>
  <fontsize>18</fontsize>
  <precision>3</precision>
  <color>
   <r>0</r>
   <g>0</g>
   <b>0</b>
  </color>
  <bgcolor mode="background">
   <r>106</r>
   <g>117</g>
   <b>150</b>
  </bgcolor>
  <bordermode>border</bordermode>
  <borderradius>5</borderradius>
  <borderwidth>2</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBLabel">
  <objectName/>
  <x>516</x>
  <y>18</y>
  <width>493</width>
  <height>410</height>
  <uuid>{d4bdb5ce-87d8-4c8c-9c64-40ec2eed6f5a}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>--------------------------------------------------------------------------------------------------------------------------
Reson is an implementation of a resonant second-order band- -pass filter. Its input arguments are for filter centre frequency (in hertz), bandwidth of the notch (also in hertz) a 3-way switch offering a choice 3 modes by which the output amplitude will be dynamically scaled and a 2-way switch selecting whether the data space for feedback within the filter is initially cleared or allowed to retain previously held information. The audible results of the reson filter are similar to those of a sweepable parametric EQ. Setting 'Scaling Mode' to 0 will provide the mose dynamically transparent effect but some manual rescaling of the amplitude of the output signal may be necessary. In this example this can be performed using the 'Output Amplitude Scaling' slider. Settings for 'Scaling Mode' of 1 or 2 force dynamic containment of the output signal similar to the effect of a compressor. 'Resonr and resonz differ from reson in that they have zeros in their tranfer functions in addition to the two poles. Resonz has its zeros at z=1 and z=-1. Resonr has its zeros at +sqrt(R) and -sqrt(R) where R is the radius of the poles in the complex z-plane. The addition of zeroes to resonr and resonz results in the improved selectivity of the magnitude response of these filters at cutoff frequencies close to 0, at the expense of less selectivity of frequencies above the cutoff peak. resonr and resonz are very close to constant-gain as the center frequency is swept, resulting in a more efficient control of the magnitude response than with traditional two-pole resonators such as reson. resonr and resonz produce a sound that is considerably different from reson, especially for lower center frequencies, trial and error is the best way of determining which resonator is best suited for a particular application. (Csound manual)</label>
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  <font>Liberation Sans</font>
  <fontsize>14</fontsize>
  <precision>3</precision>
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   <r>0</r>
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  </color>
  <bgcolor mode="nobackground">
   <r>255</r>
   <g>255</g>
   <b>255</b>
  </bgcolor>
  <bordermode>noborder</bordermode>
  <borderradius>1</borderradius>
  <borderwidth>1</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBButton">
  <objectName/>
  <x>8</x>
  <y>6</y>
  <width>100</width>
  <height>30</height>
  <uuid>{24979132-c53f-4414-ac6b-6b4f503ecfe8}</uuid>
  <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>
 <bsbObject version="2" type="BSBDisplay">
  <objectName>Filter_Cutoff_Value</objectName>
  <x>448</x>
  <y>63</y>
  <width>60</width>
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  <uuid>{745d6bee-b951-4a03-9fe8-9e10d5ae4556}</uuid>
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   <r>0</r>
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  </color>
  <bgcolor mode="nobackground">
   <r>255</r>
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   <b>255</b>
  </bgcolor>
  <bordermode>noborder</bordermode>
  <borderradius>1</borderradius>
  <borderwidth>1</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBHSlider">
  <objectName>Filter_Cutoff</objectName>
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  <uuid>{06814721-6151-4baa-84e2-8f39843b07a4}</uuid>
  <visible>true</visible>
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  <midicc>0</midicc>
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  <maximum>1.00000000</maximum>
  <value>0.44000000</value>
  <mode>lin</mode>
  <mouseControl act="jump">continuous</mouseControl>
  <resolution>-1.00000000</resolution>
  <randomizable group="0">false</randomizable>
 </bsbObject>
 <bsbObject version="2" type="BSBLabel">
  <objectName/>
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  <width>180</width>
  <height>30</height>
  <uuid>{c6d7165c-6730-426f-b293-52b411bc73cf}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Filter Cutoff</label>
  <alignment>left</alignment>
  <font>Arial</font>
  <fontsize>10</fontsize>
  <precision>3</precision>
  <color>
   <r>0</r>
   <g>0</g>
   <b>0</b>
  </color>
  <bgcolor mode="nobackground">
   <r>255</r>
   <g>255</g>
   <b>255</b>
  </bgcolor>
  <bordermode>noborder</bordermode>
  <borderradius>1</borderradius>
  <borderwidth>1</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBHSlider">
  <objectName>Bandwidth</objectName>
  <x>8</x>
  <y>84</y>
  <width>500</width>
  <height>27</height>
  <uuid>{42fe25e5-e98f-4f00-872c-f791822a1b3e}</uuid>
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  <maximum>1.00000000</maximum>
  <value>0.76000000</value>
  <mode>lin</mode>
  <mouseControl act="jump">continuous</mouseControl>
  <resolution>-1.00000000</resolution>
  <randomizable group="0">false</randomizable>
 </bsbObject>
 <bsbObject version="2" type="BSBDisplay">
  <objectName>Bandwidth_Value</objectName>
  <x>448</x>
  <y>101</y>
  <width>60</width>
  <height>30</height>
  <uuid>{a8f35453-f236-447d-88d9-1a0b135383b6}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>631.480</label>
  <alignment>right</alignment>
  <font>Arial</font>
  <fontsize>9</fontsize>
  <precision>3</precision>
  <color>
   <r>0</r>
   <g>0</g>
   <b>0</b>
  </color>
  <bgcolor mode="nobackground">
   <r>255</r>
   <g>255</g>
   <b>255</b>
  </bgcolor>
  <bordermode>noborder</bordermode>
  <borderradius>1</borderradius>
  <borderwidth>1</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBButton">
  <objectName>Initialisation</objectName>
  <x>380</x>
  <y>6</y>
  <width>130</width>
  <height>30</height>
  <uuid>{88395e38-ecab-4818-bef3-1a18b504f914}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <type>value</type>
  <pressedValue>1.00000000</pressedValue>
  <stringvalue/>
  <text>  No Initialisation</text>
  <image>/</image>
  <eventLine/>
  <latch>true</latch>
  <latched>false</latched>
 </bsbObject>
 <bsbObject version="2" type="BSBButton">
  <objectName>_Browse</objectName>
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  <uuid>{43341095-bc3a-4607-bd0e-01254da7bc67}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <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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  <visible>true</visible>
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  <midicc>0</midicc>
  <label>Seashore.wav</label>
  <alignment>left</alignment>
  <font>Arial</font>
  <fontsize>10</fontsize>
  <precision>3</precision>
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   <r>0</r>
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  </color>
  <bgcolor mode="nobackground">
   <r>229</r>
   <g>229</g>
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  <background>nobackground</background>
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  <visible>true</visible>
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  <midicc>0</midicc>
  <label>File Input</label>
  <alignment>left</alignment>
  <font>Arial</font>
  <fontsize>10</fontsize>
  <precision>3</precision>
  <color>
   <r>0</r>
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  <borderradius>1</borderradius>
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 </bsbObject>
 <bsbObject version="2" type="BSBDropdown">
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  <visible>true</visible>
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  <midicc>0</midicc>
  <bsbDropdownItemList>
   <bsbDropdownItem>
    <name>None</name>
    <value>0</value>
    <stringvalue/>
   </bsbDropdownItem>
   <bsbDropdownItem>
    <name>Peak Response Factor = 1</name>
    <value>1</value>
    <stringvalue/>
   </bsbDropdownItem>
   <bsbDropdownItem>
    <name>Overall RMS Response Factor = 1</name>
    <value>2</value>
    <stringvalue/>
   </bsbDropdownItem>
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  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Scaling Mode</label>
  <alignment>left</alignment>
  <font>Arial</font>
  <fontsize>10</fontsize>
  <precision>3</precision>
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   <b>0</b>
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  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Output Amplitude Scaling</label>
  <alignment>left</alignment>
  <font>Arial</font>
  <fontsize>10</fontsize>
  <precision>3</precision>
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   <r>0</r>
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  <bordermode>noborder</bordermode>
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  <borderwidth>1</borderwidth>
 </bsbObject>
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  <midicc>0</midicc>
  <minimum>0.00000000</minimum>
  <maximum>1.00000000</maximum>
  <value>0.03000000</value>
  <mode>lin</mode>
  <mouseControl act="jump">continuous</mouseControl>
  <resolution>-1.00000000</resolution>
  <randomizable group="0">false</randomizable>
 </bsbObject>
 <bsbObject version="2" type="BSBDisplay">
  <objectName>Amplitude</objectName>
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  <width>60</width>
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  <alignment>right</alignment>
  <font>Arial</font>
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  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Bandwidth</label>
  <alignment>left</alignment>
  <font>Arial</font>
  <fontsize>10</fontsize>
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  <borderwidth>1</borderwidth>
 </bsbObject>
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  <width>120</width>
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  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <bsbDropdownItemList>
   <bsbDropdownItem>
    <name>reson</name>
    <value>0</value>
    <stringvalue/>
   </bsbDropdownItem>
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    <name>resonr</name>
    <value>1</value>
    <stringvalue/>
   </bsbDropdownItem>
   <bsbDropdownItem>
    <name>resonz</name>
    <value>2</value>
    <stringvalue/>
   </bsbDropdownItem>
  </bsbDropdownItemList>
  <selectedIndex>1</selectedIndex>
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