Hello!
I plan on building a standalone multiple EFX unit with delay, reverb, and chorus. This would recieve audio signal from an unbalanced line mixer. I've been looking on a lot of EFX kits/PCB's for building guitar pedals, would I get into trouble with impedance if I were to use these kind of circuits?
Since the audio is coming from a mixer I'll be able to dampen the signal so it isn't too loud, would that solve the problem with the signal not being instrument level?
Thanks,
TA
I plan on building a standalone multiple EFX unit with delay, reverb, and chorus. This would recieve audio signal from an unbalanced line mixer. I've been looking on a lot of EFX kits/PCB's for building guitar pedals, would I get into trouble with impedance if I were to use these kind of circuits?
Since the audio is coming from a mixer I'll be able to dampen the signal so it isn't too loud, would that solve the problem with the signal not being instrument level?
Thanks,
TA
In general "Guitar" effects pedals are designed to be cascaded, sometimes in silly large/complex pedalboards, so 4 or 5 is easy peasy.
Attenuating mixer signal 10:1 (22k:2k2 resistors) is about right, since typical Mixer signal out level is about 1V, pedals are happy with 100mV.
Small problem is that at the end of the chain you´ll need to rise level back to 1V, so 10X gain, if you intend to straight drive a Power Amp.
But if your Mixer has a built-in Effects Loop Send-receive pair of jacks, then that´s already done for you.
If not, copy a Guitar Amp effects loop circuit ... I think you are building the Effects yourself anyway, so just a little extra work
Check how Marshall Valvestate, Peavey, laney, Crate do it.
Attenuating mixer signal 10:1 (22k:2k2 resistors) is about right, since typical Mixer signal out level is about 1V, pedals are happy with 100mV.
Small problem is that at the end of the chain you´ll need to rise level back to 1V, so 10X gain, if you intend to straight drive a Power Amp.
But if your Mixer has a built-in Effects Loop Send-receive pair of jacks, then that´s already done for you.
If not, copy a Guitar Amp effects loop circuit ... I think you are building the Effects yourself anyway, so just a little extra work
Check how Marshall Valvestate, Peavey, laney, Crate do it.
Ok, thanks a lot for the input! Yeah, the low output level from the effect circuit(s) may possibly be the biggest issue. There will be another small mixer circuit recieving the different effects, I'll see if there will be enough gain in this to make up for the decreased signal level.
About attenuating the signal from the mixer: you say "10:1 (22k:2k2 resistors)", do you with this mean 22k in series and 2k2 to GND?
Thanks,
TA
About attenuating the signal from the mixer: you say "10:1 (22k:2k2 resistors)", do you with this mean 22k in series and 2k2 to GND?
Thanks,
TA