APB's new console, VCA?

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   OK,
I've been in pro-sound my fair share of years, but did I miss the class on VCA?  What is it?  My venue will soon be updating our FOH equip.  Part of that update is getting a new APB C56+4 broad.  And all I read about is how it doesn't use analog subgroupes, but has VCA grouping.  Ok, fine; what is VCA? 
  We just  finished  the house speaker replacement, EAW Ax stuff and QSC Cx amps.....Light Viper, London Cobra net, fun toys! anyway,,...
Thanks for any wisdom,
David

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TD_Mave Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 13 October 2006 Location: United States Status: Offline Points: 2	Post Options Post Reply Quote TD_Mave Report Post Thanks(0) Quote Reply Topic: APB's new console, VCA? Posted: 13 October 2006 at 10:39am
	OK, I've been in pro-sound my fair share of years, but did I miss the class on VCA? What is it? My venue will soon be updating our FOH equip. Part of that update is getting a new APB C56+4 broad. And all I read about is how it doesn't use analog subgroupes, but has VCA grouping. Ok, fine; what is VCA? We just finished the house speaker replacement, EAW Ax stuff and QSC Cx amps.....Light Viper, London Cobra net, fun toys! anyway,,... Thanks for any wisdom, David

godathunder Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 19 July 2004 Location: wicklow Status: Offline Points: 1815	Post Options Post Reply Quote godathunder Report Post Thanks(0) Quote Reply Posted: 13 October 2006 at 3:02pm
	VCA stands for voltage controlled amplifier - in your case it will mean that instead of sending all the channels to a group (ie another channel), each of the channels assigned to the vca will have its volume adjusted by the vca fader its assigned to in addition to the channel fader. its a bit like having another communal volume control in line with the channels but the vca fader actually controls the voltage controlling the gain of an opamp or similar in each channel assigned to it. so youre controlling the volume of a group of channels but without summing them together into an actual group
	LOUDER THAN LOUD

james folkes Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 08 January 2005 Location: United Kingdom Status: Offline Points: 3064	Post Options Post Reply Quote james folkes Report Post Thanks(0) Quote Reply Posted: 14 October 2006 at 7:30am
	you ceratinly have missed out! voltage control amplifiers are the basis of pretty much any analogue elctronis sythesiser, first popularised by the late robert moog. their application in mixers and the like is particulary relevant. by using vca you avoid routing signal through the fader, a ready place to introduce noise or channel bleed on a cross fader. also, as it is simply a control circuit, you can adjsut the parameters of the relating output voltage to change the countour of the faders on the fly, nice! james.
	mardy hippy.

TD_Mave Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 13 October 2006 Location: United States Status: Offline Points: 2	Post Options Post Reply Quote TD_Mave Report Post Thanks(0) Quote Reply Posted: 19 October 2006 at 4:13pm
	Thank you guy's so much for the input. Have a good one!!!