What's a good gain range for feedback delay?

Test Electrix · 18th September 2009, 04:39 PM

Right I'm going through a range of components of what to use for gain as feedback in a delay unit but don't particularly know what a good range is (0 < N), any reccomendations? I want a decent amount for super-dubby washouts but also fine control over the range of a normal pot' turn

neutron7 · 20th September 2009, 06:58 AM

you want that to be adjustable. from 0 to 99% or 100% if you like to go crazy
it is one of the most important controls of a delay.

Test Electrix · 20th September 2009, 09:32 PM

Yeah I know hence needing an indicator of what range it should be, I'm working out what a good max gain would be with it being all useable plus a bit of sillyness.

neutron7 · 20th September 2009, 10:52 PM

Anything over 100% will get louder as it repeats. if you ride that control you can definitely get some dubby stuff happening, but it can easily get out of control.

its good to put filters and other effects in the feedback loop as well.

anyways the whole range is useful, up to 110%
however the lower part of the range becomes almost inaudible
You could have a reverse law control on there, where most of the action is over the 50 to 110% range.

Test Electrix · 21st September 2009, 12:43 PM

Aah, cheers, I didn't think about inaudible signal gain so this 'reverse control law' would be quite handy; what is it and how does it work? Sorry if it's simple, I just had a quick look on google and couldn't find anything. It would be really good for fine control of gain ratio though

neutron7 · 21st September 2009, 01:29 PM

that would be like an audio taper potentiometer, which has most of its range near the bottom, but around the other way so the fine control is at the top. I think there are potentiometers called "anti-log" but almost impossible to find. you would probably just use a linear potentiometer and make the circuit behave that way electronically.

18th September 2009, 04:39 PM	#1
Test Electrix diyAudio Member Join Date: Mar 2009	What's a good gain range for feedback delay? Right I'm going through a range of components of what to use for gain as feedback in a delay unit but don't particularly know what a good range is (0 < N), any reccomendations? I want a decent amount for super-dubby washouts but also fine control over the range of a normal pot' turn

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20th September 2009, 06:58 AM	#2
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	you want that to be adjustable. from 0 to 99% or 100% if you like to go crazy it is one of the most important controls of a delay.

20th September 2009, 09:32 PM	#3
Test Electrix diyAudio Member Join Date: Mar 2009	Yeah I know hence needing an indicator of what range it should be, I'm working out what a good max gain would be with it being all useable plus a bit of sillyness.

20th September 2009, 10:52 PM	#4
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	Anything over 100% will get louder as it repeats. if you ride that control you can definitely get some dubby stuff happening, but it can easily get out of control. its good to put filters and other effects in the feedback loop as well. anyways the whole range is useful, up to 110% however the lower part of the range becomes almost inaudible You could have a reverse law control on there, where most of the action is over the 50 to 110% range.

21st September 2009, 12:43 PM	#5
Test Electrix diyAudio Member Join Date: Mar 2009	Aah, cheers, I didn't think about inaudible signal gain so this 'reverse control law' would be quite handy; what is it and how does it work? Sorry if it's simple, I just had a quick look on google and couldn't find anything. It would be really good for fine control of gain ratio though

21st September 2009, 01:29 PM	#6
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	that would be like an audio taper potentiometer, which has most of its range near the bottom, but around the other way so the fine control is at the top. I think there are potentiometers called "anti-log" but almost impossible to find. you would probably just use a linear potentiometer and make the circuit behave that way electronically.

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