;Written by Iain McCurdy, 2006

;THE REVERB OPCODE IS PLACED IN A SEPARATE, ALWAYS ON, INSTRUMENT FROM THE SOURCE SOUND PRODUCING INSTRUMENT.
;THE IS A COMMONLY USED TECHNIQUE WITH TIME SMEARING OPCODES AND EFFECTS LIKE REVERBS AND DELAYS.


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

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


;Reverb structure:

;		       +----+
;		     +-|comb|-+
;		     | +----+ |
;		     +        +
;		     | +----+ |
;		     +-|comb|-+
;		     | +----+ | +------+ +------+
;		IN-->|        |-|alpass|-|alpass|-->OUT
;		     | +----+ | +------+ +------+
;		     +-|comb|-+
;		     | +----+ |
;		     |        |
;		     | +----+ |
;		     +-|comb|-+
;		       +----+


;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)


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	10	;GUI
	ktrig	metro	10
	if (ktrig == 1)	then
		gkingain		invalue	"LiveGain"
		gkmix		invalue	"Mix"
		gkrvbtime		invalue	"ReverbTime"
		gkinput		invalue	"Input"
	endif
endin

instr	1	;PLAYS FILE AND OUTPUTS GLOBAL VARIABLES
	if	gkinput==0	then									;IF FILE INPUT IS SELECTED...
		Sfile		invalue	"_Browse1"
		gasigL, gasigR	FilePlay2	Sfile, 1, 0, 1					;GENERATE 2 AUDIO SIGNALS FROM A SOUND FILE (NOTE THE USE OF GLOBAL VARIABLES)		
	else													;OTHERWISE
		asigL, asigR	ins									;TAKE INPUT FROM COMPUTER'S AUDIO INPUT
		gasigL	=	asigL * gkingain						;SCALE USING 'Input Gain' SLIDER
		gasigR	=	asigR * gkingain						;SCALE USING 'Input Gain' SLIDER
	endif												;END OF CONDITIONAL BRANCHING
endin

instr	2	;REVERBERATING INSTRUMENT
	aRvbL	reverb	gasigL*.3, gkrvbtime												;CREATE LEFT CHANNEL REVERB
	aRvbR	reverb	gasigR*.3, gkrvbtime												;CREATE RIGHT CHANNEL REVERB
			outs		(aRvbL*gkmix*.5)+(gasigL*(1-gkmix)), (aRvbR*gkmix*.5)+(gasigR*(1-gkmix))		;MIX SOURCE SIGNAL AND REVERB SIGNAL AT THE OUTPUT AND IMPLEMENT WET/DRY CONTROL USING THE FLTK SLIDER VARIABLE gkmix
			clear	gasigL, gasigR														;CLEAR GLOBAL AUDIO VARIABLES
endin
</CsInstruments>
<CsScore>
;INSTR | START | DURATION
i 10		0.0	   3600	;GUI
i  2		0.0	   3600	;REVERB INSTRUMENT PLAYS FOR 1 HOUR (AND KEEPS PERFORMANCE GOING)
</CsScore>
</CsoundSynthesizer>
<bsbPanel>
 <label>Widgets</label>
 <objectName/>
 <x>1</x>
 <y>28</y>
 <width>951</width>
 <height>321</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>316</height>
  <uuid>{aa607456-d368-4d59-8497-d16d608404c3}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>reverb</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>158</r>
   <g>220</g>
   <b>217</b>
  </bgcolor>
  <bordermode>border</bordermode>
  <borderradius>5</borderradius>
  <borderwidth>2</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBButton">
  <objectName/>
  <x>8</x>
  <y>10</y>
  <width>100</width>
  <height>30</height>
  <uuid>{487d5181-d838-4cce-9628-317fefc350cb}</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 1 0 -1</eventLine>
  <latch>true</latch>
  <latched>false</latched>
 </bsbObject>
 <bsbObject version="2" type="BSBLabel">
  <objectName/>
  <x>8</x>
  <y>72</y>
  <width>120</width>
  <height>30</height>
  <uuid>{0200a063-5db8-4668-bc2d-2d989a083f6e}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Live input Gain</label>
  <alignment>left</alignment>
  <font>Liberation Sans</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="BSBDisplay">
  <objectName>LiveGain</objectName>
  <x>448</x>
  <y>72</y>
  <width>60</width>
  <height>30</height>
  <uuid>{ab191e3a-430d-4f1d-88aa-9840342cd2d3}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>0.130</label>
  <alignment>right</alignment>
  <font>Liberation Sans</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="BSBLabel">
  <objectName/>
  <x>516</x>
  <y>2</y>
  <width>430</width>
  <height>316</height>
  <uuid>{74928ed2-b701-4668-9a11-74763d317e9b}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>reverb</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>158</r>
   <g>220</g>
   <b>217</b>
  </bgcolor>
  <bordermode>border</bordermode>
  <borderradius>5</borderradius>
  <borderwidth>2</borderwidth>
 </bsbObject>
 <bsbObject version="2" type="BSBLabel">
  <objectName/>
  <x>519</x>
  <y>22</y>
  <width>427</width>
  <height>293</height>
  <uuid>{d4bdb5ce-87d8-4c8c-9c64-40ec2eed6f5a}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>-------------------------------------------------------------------------------------------------------
reverb is a basic reverberation unit. Within the opcode an algorithm consisting of four parallel comb filters and two series allpass filters is employed Its only obligatory input argument besides the input audio signal is for reverb time in seconds. An optional 2-way switch defines the initial disposition of the delay loop data (0=cleared, 1=previous data retained). It should be bourne in mind that the 'reverb' algorithm represents quite a basic reverb algorithm and that with transient input audio granularity in the reverb effect becomes quite evident. (0=no filtering, 1=more filtering) In this example a Dry/Wet Mix crossfader is also implemented.

In this example the user can choose between a sound file input or the computer's live input. An input gain control on the live input is also provided.</label>
  <alignment>left</alignment>
  <font>Liberation Sans</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="BSBDropdown">
  <objectName>Input</objectName>
  <x>180</x>
  <y>215</y>
  <width>120</width>
  <height>30</height>
  <uuid>{9b81a1f2-bcb8-4582-925b-9ae56def3865}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <bsbDropdownItemList>
   <bsbDropdownItem>
    <name>Audio File</name>
    <value>0</value>
    <stringvalue/>
   </bsbDropdownItem>
   <bsbDropdownItem>
    <name> Live Input</name>
    <value>1</value>
    <stringvalue/>
   </bsbDropdownItem>
  </bsbDropdownItemList>
  <selectedIndex>0</selectedIndex>
  <randomizable group="0">false</randomizable>
 </bsbObject>
 <bsbObject version="2" type="BSBLabel">
  <objectName/>
  <x>98</x>
  <y>215</y>
  <width>80</width>
  <height>30</height>
  <uuid>{62eeb695-9b83-42da-81cd-8000c232d9b9}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Input</label>
  <alignment>right</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>_Browse1</objectName>
  <x>8</x>
  <y>252</y>
  <width>170</width>
  <height>30</height>
  <uuid>{9b992da1-8c0f-449e-af03-7913cc05efed}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <type>value</type>
  <pressedValue>1.00000000</pressedValue>
  <stringvalue>808loop.wav</stringvalue>
  <text>Browse Audio File</text>
  <image>/</image>
  <eventLine/>
  <latch>false</latch>
  <latched>false</latched>
 </bsbObject>
 <bsbObject version="2" type="BSBLineEdit">
  <objectName>_Browse1</objectName>
  <x>180</x>
  <y>253</y>
  <width>330</width>
  <height>28</height>
  <uuid>{15a8ec14-710f-43e6-be9e-f5dc8c8786cb}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>808loop.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>180</x>
  <y>282</y>
  <width>330</width>
  <height>34</height>
  <uuid>{a63909ac-6fa4-41c8-a84b-ba08e76132ab}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Restart the instrument after changing the audio file.</label>
  <alignment>left</alignment>
  <font>Liberation Sans</font>
  <fontsize>12</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>LiveGain</objectName>
  <x>8</x>
  <y>56</y>
  <width>500</width>
  <height>27</height>
  <uuid>{2a8dc6e2-12f4-443d-af9b-59e4373cc24b}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <minimum>0.00000000</minimum>
  <maximum>1.00000000</maximum>
  <value>0.13000000</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>150</y>
  <width>120</width>
  <height>30</height>
  <uuid>{4fa545c6-e2f1-4387-8c9f-4a9dd388bb42}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Reverb Time</label>
  <alignment>left</alignment>
  <font>Liberation Sans</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="BSBDisplay">
  <objectName>ReverbTime</objectName>
  <x>448</x>
  <y>150</y>
  <width>60</width>
  <height>30</height>
  <uuid>{b0ad1916-b43e-44c2-be40-bca29f5cb1f4}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>5.121</label>
  <alignment>right</alignment>
  <font>Liberation Sans</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>ReverbTime</objectName>
  <x>8</x>
  <y>134</y>
  <width>500</width>
  <height>27</height>
  <uuid>{9069e547-5638-4568-896f-980087c61de0}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <minimum>0.00100000</minimum>
  <maximum>20.00000000</maximum>
  <value>5.12074400</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>110</y>
  <width>172</width>
  <height>33</height>
  <uuid>{aea49d35-076f-4f53-973f-218c07658afd}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>Dry / Wet Mix</label>
  <alignment>left</alignment>
  <font>Liberation Sans</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="BSBDisplay">
  <objectName>Mix</objectName>
  <x>448</x>
  <y>110</y>
  <width>60</width>
  <height>30</height>
  <uuid>{e618dde4-1681-4841-ad6b-2f09a0dc7e42}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <label>0.534</label>
  <alignment>right</alignment>
  <font>Liberation Sans</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>Mix</objectName>
  <x>8</x>
  <y>95</y>
  <width>500</width>
  <height>27</height>
  <uuid>{d92cf2f2-852e-4c61-ba7a-5211a302ad02}</uuid>
  <visible>true</visible>
  <midichan>0</midichan>
  <midicc>0</midicc>
  <minimum>0.00000000</minimum>
  <maximum>1.00000000</maximum>
  <value>0.53400000</value>
  <mode>lin</mode>
  <mouseControl act="jump">continuous</mouseControl>
  <resolution>-1.00000000</resolution>
  <randomizable group="0">false</randomizable>
 </bsbObject>
</bsbPanel>
<bsbPresets>
</bsbPresets>
