if guitar effects are on during recording, they record only to left side
This is a somewhat long posting that I just sent to Logic Pro 7 support. If anyone can help, that would be great. Many thanks!
Here's what "works fine": Record electric guitar onto audio track with no effects. Now, click "inserts" such that various multi-effect options (what I'm calling "macro-effects") are offered. Select any electric guitar effect; all is well. Perfect stereo signal, able to be panned anywhere, left or right.
Here's what is wrong every time: Record electric guitar onto audio track WHILE using a "macro-effect" (such as "Angus on SG + ..."). In this case, the signal is recorded entirely into the left stereo channel. No sound in the right channel. The LED read-out for levels shows the left channel moving up and down; no movement on the right bar. If you look to the audio wave itself, there is a wave ONLY "above the line" -- no wave recorded below the line at all; i.e., it looks like a mountain range. The pan is set to center; but there's only sound in the left speaker. If you move the pan all the way to the right, sound goes to zero.
This MUST be a problem, since it is clear that the effect CAN be applied in stereo to the signal after it is recorded.
Also, though it happens with the "crunch" and "distorted" guitar macro-effects, it does not happen with several of the "clean" effects. (I think it does happen with a few; I'm not sure.) Similarly, effects for vocals (such as "Male Double Lead Vocal") don't have this problem. Same is true for various macro-effects for the bass. I.e., not only can these effects be applied to a previously recorded signal, they can also be applied to the signal while it's being recorded, and the right channel is never lost. Their wave read-outs don't look like mountain ranges; rather, they look like mountain ranges with their full reflection in the water (under the line).
I haven't tested this independently with the various inserts that are working within, say, the "Angus on SG + ...." macro-effect. However, I have opened up each one of those inserts, and I haven't seen anything that would suggest that the right channel should be cut. (Plus, as I said, the right channel ISN'T cut if this same macro-effect is applied to a previously recorded signal.)
Relevant seems to be that, for these particular macro-effects, the input always changes to "Input 1-2" (or "Input 7-8," etc.), whereas for the macro-effects that are fine, the input is just a single number (e.g., "Input 1" or "Input 7").
My audio device is the Presonus Firepod. It would be odd if this component were the problem, since it is perfectly capable of recording a signal that can have the stereo effect applied to it (producing the full wave form). I.e., it records both the stuff that works and the stuff that doesn't work using the same jacks, etc.
Interestingly, when the signal is being recorded (with the macro-effect ON), the wave representation is not a "mountain range" but rather the full "mountain plus reflection." I.e., to the eye, things look just fine when they're being recorded. (I just tested this to make sure.) However, I'm pretty sure that there is in fact no effected signal coming through the right channel at that time. There MAY be a non-effected signal in the right channel, but I'm not sure. In any case, after the stop button is pushed and the track gets officially "processed" by Logic, then the wave changes to looking like just the top of the mountain range (nothing under the line).
Here's what "works fine": Record electric guitar onto audio track with no effects. Now, click "inserts" such that various multi-effect options (what I'm calling "macro-effects") are offered. Select any electric guitar effect; all is well. Perfect stereo signal, able to be panned anywhere, left or right.
Here's what is wrong every time: Record electric guitar onto audio track WHILE using a "macro-effect" (such as "Angus on SG + ..."). In this case, the signal is recorded entirely into the left stereo channel. No sound in the right channel. The LED read-out for levels shows the left channel moving up and down; no movement on the right bar. If you look to the audio wave itself, there is a wave ONLY "above the line" -- no wave recorded below the line at all; i.e., it looks like a mountain range. The pan is set to center; but there's only sound in the left speaker. If you move the pan all the way to the right, sound goes to zero.
This MUST be a problem, since it is clear that the effect CAN be applied in stereo to the signal after it is recorded.
Also, though it happens with the "crunch" and "distorted" guitar macro-effects, it does not happen with several of the "clean" effects. (I think it does happen with a few; I'm not sure.) Similarly, effects for vocals (such as "Male Double Lead Vocal") don't have this problem. Same is true for various macro-effects for the bass. I.e., not only can these effects be applied to a previously recorded signal, they can also be applied to the signal while it's being recorded, and the right channel is never lost. Their wave read-outs don't look like mountain ranges; rather, they look like mountain ranges with their full reflection in the water (under the line).
I haven't tested this independently with the various inserts that are working within, say, the "Angus on SG + ...." macro-effect. However, I have opened up each one of those inserts, and I haven't seen anything that would suggest that the right channel should be cut. (Plus, as I said, the right channel ISN'T cut if this same macro-effect is applied to a previously recorded signal.)
Relevant seems to be that, for these particular macro-effects, the input always changes to "Input 1-2" (or "Input 7-8," etc.), whereas for the macro-effects that are fine, the input is just a single number (e.g., "Input 1" or "Input 7").
My audio device is the Presonus Firepod. It would be odd if this component were the problem, since it is perfectly capable of recording a signal that can have the stereo effect applied to it (producing the full wave form). I.e., it records both the stuff that works and the stuff that doesn't work using the same jacks, etc.
Interestingly, when the signal is being recorded (with the macro-effect ON), the wave representation is not a "mountain range" but rather the full "mountain plus reflection." I.e., to the eye, things look just fine when they're being recorded. (I just tested this to make sure.) However, I'm pretty sure that there is in fact no effected signal coming through the right channel at that time. There MAY be a non-effected signal in the right channel, but I'm not sure. In any case, after the stop button is pushed and the track gets officially "processed" by Logic, then the wave changes to looking like just the top of the mountain range (nothing under the line).
dual g5, Mac OS X (10.4.4), Logic Pro 7
