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Looper's Delight
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See my comments between lines below.. J Johans wrote: > hard to work through without looking at it- > one thing i would suggest as this has helped me in the past... > > find the manual on every piece of gear and determine whether the Exactly! Knowing which levels, i.e. instrument- or line level, for each input and output is essential. I don't know all the gear referred.. It's possible all levels match just fine, but also possible that some instrument-level input is connected to a lineout level. Sometimes this will work, provided the input level control has enough adjustment range to handle this - and provided out- and input impedances don't mismatch too much. Impedance mismatch isn't likely the problem with said gear. Typically, output impedances are relatively low and inputs are high, which will work fine; it's more the levels that matters. > inputs/outputs are balanced or unbalanced (in your terms, stereo or mono) > im still learning, but what balanced cables do is reduce noise, > especially over long cable runs > they do this by sending an additional signal that is 180 degrees out of > phase- > so your tip and ring of a balanced connection are the same signal.... > but they invert the waveform on the ring... thus canceling out any noise > induced along the way- > > i have learned.... if you are connecting an unbalanced output to an > unbalanced input... use a mono cable.... rather if both input and output > are balanced ...ie.. TRS.... use a stereo cable- > > in theory and in research....it honestly should make no difference... > but my experience shows otherwise > > the other big issue is the +4 -10 ... im not familiar with the gear you > are using, so its hard for me to determine what each piece does ... but > when the +4/-10 comes into play.... honestly just try both ways to see > which one has less noise- > ...snipped... Agreed. this is the in/out level differences, as said above. > froshizzle > > ------------------------------------------------------------------------ > Date: Sun, 8 Mar 2009 08:56:03 +0100 > Subject: GAIN STRUCTURE > From: mark@markfrancombe.com > To: Loopers-Delight@loopers-delight.com > > OK,, technical people... > > I have never been very good at technical stuff, despite having enough > gear to launch a shuttle. > So now i want a technical 101 type course in getting a good gain > structure in my gear. > ...snipped... > > Now, for some reason, the 2 EDP's are completely different sounding > (old one is kinda muddy and bassy, loses top), and the thing is that I > just cant get a good level without distortion on the loop (too high > level going in) or too low and hissy. Here you need to isolate the problem, i.e. run one EDP at a time in the same configuration, to determine if one might have a problem. If both works/sounds the same in the same setup, it's not the EDP's, but your rigging hookup. > So now I have SO MANY input level controls on my system, something is > causing distortion I dont know how to start... heres the signal chain. > > 1. From guitar (first a few stomps) First level control VORTEX > 2. Second level control MIXER INPUT (two levels on switch +4 or -10) > + track level. (up to here is ok, I can hear that my guitar is > clean and undistorted, and has some headroom when I hit the thing > (Vortex lights up red only on REALLY loud hits) > 3. Third level control, SEND level (both track sens and overall SENDS > level control) > 4. Fourth level control EDP input level > 5. Fifth level control EFFECT input level control (altho there is > really no input level control on the red sound federation, just a > gain adjust in one of the menus) > 6. and SIXTH input level control MIXER INPUT (two levels on switch +4 > or -10) + track level. (this is where EDPs + effects are returned > to mixer) > > > So what is a good routine in figuring out a gain stucture, that is both > loud and clean?... and what should I set the mixer level switches to... > loud or quiet? (+4 or -10) I'd suggest: . check the manuals WRT in/out levels and type of cabling . verify your intended hookups match above findings . turn all inputs down, and start setting input level on first device . then move on through the chain - keeping all send/return loops muted . when the direct chain works, move one to set levels in the loops Some generally useful info on building rigs are emerging on http://www.adadepot.com/forums/ We're right about editing a number of good threads to be merged into some howto's/guidelines. They'll likely be found in the Technical section or the FAQ section. Give us a bit'o'time ;) -- rgds, van Sinn