Question about inverting buffers... (patch matrix)
Posted: 08 Feb 2012, 15:57
here you can find the modifications to add buffers to an EMS VCS3 patch matrix http://www.hinton-instruments.co.uk/ems ... tml#matrix
I love the idea, I already have a big flight case housing all my "other" effects, id like to use the matrix so I can easily patch everything up, not only the audio path but the modulation sources et cetera...
I was wondering if anyone could shed some light on two issues I have with the plans on that website:
I understand that the buffering system as is will invert the signal twice...
A) is there any reason he decided to use a lm324 as the input buffer when a tl084 is used as an output buffer?
And B) why is it he didn't need any capacitors?
Do these two things have anything to do with the fact that the buffers invert the signal?
Basically if this is all designed to preserve oscillator tuning I don't think it helps my guitar effect, and I will use all tl074s as I've been doing in the past.
I'd like to hear if anyone has any other ideas on how to get as many inverting buffers as possible in the least amount of space. I'd like to end up with two different matrices, one for audio path, the other for control voltages( these are all going to LED/LDRs for the effects so far)
I love the idea, I already have a big flight case housing all my "other" effects, id like to use the matrix so I can easily patch everything up, not only the audio path but the modulation sources et cetera...
I was wondering if anyone could shed some light on two issues I have with the plans on that website:
I understand that the buffering system as is will invert the signal twice...
A) is there any reason he decided to use a lm324 as the input buffer when a tl084 is used as an output buffer?
And B) why is it he didn't need any capacitors?
Do these two things have anything to do with the fact that the buffers invert the signal?
Basically if this is all designed to preserve oscillator tuning I don't think it helps my guitar effect, and I will use all tl074s as I've been doing in the past.
I'd like to hear if anyone has any other ideas on how to get as many inverting buffers as possible in the least amount of space. I'd like to end up with two different matrices, one for audio path, the other for control voltages( these are all going to LED/LDRs for the effects so far)