;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

		khp			invalue	"Filter_Cutoff"
		gkhp			tablei	khp, giExp20000, 1
					outvalue	"Filter_Cutoff_Value", gkhp
		gkgain		invalue	"Amplitude"

		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	
	khp			portk	gkhp, 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													;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 		tone 	asigL, khp, i(gkskip)
	aresR 		tone 	asigR, khp, i(gkskip)
				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>

<bsbPanel>
 <label>Widgets</label>
 <objectName/>
 <x>329</x>
 <y>354</y>
 <width>937</width>
 <height>195</height>
 <visible>true</visible>
 <uuid/>
 <bgcolor mode="background">
  <r>241</r>
  <g>226</g>
  <b>185</b>
 </bgcolor>
 <bsbObject version="2" type="BSBLabel">
  <objectName/>
  <x>2</x>
  <y>2</y>
  <width>512</width>
  <height>190</height>
  <uuid>{aa607456-d368-4d59-8497-d16d608404c3}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>tone</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>515</x>
  <y>2</y>
  <width>418</width>
  <height>190</height>
  <uuid>{74928ed2-b701-4668-9a11-74763d317e9b}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>tone</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>519</x>
  <y>19</y>
  <width>414</width>
  <height>173</height>
  <uuid>{d4bdb5ce-87d8-4c8c-9c64-40ec2eed6f5a}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>----------------------------------------------------------------------------------------------------
tone is an implementation of a second-order low-pass filter Its input arguments are for cutoff frequency (half-power point) 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. As its name suggests, the audible effect of the tone opcode on an audio signal is similar to that of a tone control. Multiple iterations of the tone opcode applied to the signal path in series can be used to create a sharper cutoff curve.</label>
  <alignment>left</alignment>
  <font>Arial</font>
  <fontsize>14</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/>
  <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>true</latched>
 </bsbObject>
 <bsbObject version="2" type="BSBDisplay">
  <objectName>Filter_Cutoff_Value</objectName>
  <x>448</x>
  <y>63</y>
  <width>60</width>
  <height>30</height>
  <uuid>{745d6bee-b951-4a03-9fe8-9e10d5ae4556}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>389.991</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="BSBHSlider">
  <objectName>Filter_Cutoff</objectName>
  <x>8</x>
  <y>46</y>
  <width>500</width>
  <height>27</height>
  <uuid>{06814721-6151-4baa-84e2-8f39843b07a4}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <minimum>0.00000000</minimum>
  <maximum>1.00000000</maximum>
  <value>0.43000000</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/>
  <x>8</x>
  <y>63</y>
  <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>Amplitude</objectName>
  <x>8</x>
  <y>84</y>
  <width>500</width>
  <height>27</height>
  <uuid>{42fe25e5-e98f-4f00-872c-f791822a1b3e}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <minimum>0.00000000</minimum>
  <maximum>2.00000000</maximum>
  <value>0.69200000</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>
  <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>0.692</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>
  <x>8</x>
  <y>153</y>
  <width>170</width>
  <height>30</height>
  <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>
  <x>177</x>
  <y>154</y>
  <width>330</width>
  <height>28</height>
  <uuid>{b66f3878-dfd0-4290-9b9d-73be88197222}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Seashore.wav</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>229</r>
   <g>229</g>
   <b>229</b>
  </bgcolor>
  <background>nobackground</background>
 </bsbObject>
 <bsbObject version="2" type="BSBLabel">
  <objectName/>
  <x>8</x>
  <y>131</y>
  <width>160</width>
  <height>30</height>
  <uuid>{7e1e7af4-88dd-4046-a781-fa2dc828b980}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>File Input</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="BSBLabel">
  <objectName/>
  <x>8</x>
  <y>101</y>
  <width>180</width>
  <height>30</height>
  <uuid>{027163fb-bbfe-488e-9351-1c1cd9a9d626}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Output Amplitude Scaling</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>
</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>
