;Written by Iain McCurdy, 2006

;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 	= 2		;NUMBER OF AUDIO SAMPLES IN EACH CONTROL CYCLE
nchnls 	= 2		;NUMBER OF CHANNELS (2=STEREO)


giExp20_20000	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

	Sfile_new			strcpy	""						;INIT TO EMPTY STRING

	ktrig	metro	10
	if (ktrig == 1)	then
		kfreq		invalue	"Filter_Cutoff"
		gkfreq		tablei	kfreq, giExp20_20000, 1
					outvalue	"Filter_Cutoff_Value", gkfreq
		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	
	kfreq		portk	gkfreq, 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 		buthp 	asigL, kfreq, i(gkskip)							;FILTER EACH CHANNEL SEPARATELY
	aresR 		buthp 	asigR, kfreq, i(gkskip)							;FILTER EACH CHANNEL 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		;INSTRUMENT 1 PLAYS FOR 1 HOUR
</CsScore>
</CsoundSynthesizer>

<bsbPanel>
 <label>Widgets</label>
 <objectName/>
 <x>305</x>
 <y>267</y>
 <width>864</width>
 <height>297</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>292</height>
  <uuid>{aa607456-d368-4d59-8497-d16d608404c3}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>butterhp / buthp</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>340</width>
  <height>292</height>
  <uuid>{74928ed2-b701-4668-9a11-74763d317e9b}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>butterhp / buthp</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>25</y>
  <width>333</width>
  <height>251</height>
  <uuid>{d4bdb5ce-87d8-4c8c-9c64-40ec2eed6f5a}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>---------------------------------------------------------------------------------
butterhp/buthp is an implementation of a second-order IIR Butterworth high-pass filter. Its input arguments are for filter cutoff frequency (in hertz) and an optional 2-way switch (default=0) to select whether the data space for feedback within the filter is initially cleared or allowed to retain previously held information. butterhp/buthp are slower than the original filters in Csound but provide an almost flat passband and very good precision and stopband attenuation Multiple iterations of the butterhp/buthp opcode applied to the signal path in series can be used to create a sharper cutoff slope.</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>8</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>118</y>
  <width>60</width>
  <height>30</height>
  <uuid>{745d6bee-b951-4a03-9fe8-9e10d5ae4556}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>726.416</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>101</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>0.52000000</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>118</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="BSBButton">
  <objectName>_Browse</objectName>
  <x>8</x>
  <y>254</y>
  <width>170</width>
  <height>30</height>
  <uuid>{b9431a61-61f7-432b-bf6f-c47ddc7f9050}</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>179</x>
  <y>255</y>
  <width>330</width>
  <height>28</height>
  <uuid>{68b5f90b-b78e-4581-b434-232db5f4c40f}</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>233</y>
  <width>150</width>
  <height>30</height>
  <uuid>{936f6eb0-5225-4bd7-a5fe-a49df1c9c5ac}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Audio File</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>7</x>
  <y>178</y>
  <width>180</width>
  <height>30</height>
  <uuid>{2e52a7a7-dc13-405e-896d-db2a7431d8dd}</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>
 <bsbObject version="2" type="BSBHSlider">
  <objectName>Amplitude</objectName>
  <x>7</x>
  <y>161</y>
  <width>500</width>
  <height>27</height>
  <uuid>{6ab84e0f-82a7-4b9c-af23-35bd7d9b7fa2}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <minimum>0.00000000</minimum>
  <maximum>2.00000000</maximum>
  <value>1.00800000</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>447</x>
  <y>178</y>
  <width>60</width>
  <height>30</height>
  <uuid>{99d6bf8b-3c85-4911-a29a-7dd678a940ed}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>1.008</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>52</y>
  <width>130</width>
  <height>30</height>
  <uuid>{b6345774-7938-4e62-9d8b-0ada81f7bcc5}</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>
</bsbPanel>
<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>
