preamp causing phasing issues?

  • Thread starter Thread starter bennychico11
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bennychico11

bennychico11

...
Something strange happened today. I recorded a VO peice and didn't notice anything strange while doing it. But when I went back to edit it, there seemed to be some phasing occuring with the MONO track.
I checked everything...making sure things were plugged in all the way, speaker positions, etc. But the session I had recorded five minutes prior to this one, didn't have any issues. I've known that we need to upgrade the preamps we use for awhile, since we use the stock pres that came on the Yamaha digital mixer....but I've never heard of a preamp causing phasing problems on a mono track.

I would think it would be the monitors being in a bad position, but like i said, the previous session was fine.

any ideas on what I should check? or are my ears going crazy
 
Assuming you mean a comb filtered effect? How about hard reflections/multi-path(?) off a new mic position, copy sheets being held by the talent, music stand...?
Wayne
 
thanks for the reply
i'm pretty sure it's a phasing issue. the mono signal keeps changing in volume in different channels of the stereo spectrum. for awhile it seems okay, then it seems to drift over to the right channel a bit more, then back to the left, then dead center....you kinda know when it's phasing 'cause it bugs the hell out of you.
the glass in the booth shouldn't be affecting it 'cause it's slanted downward...the music stand has a towel draped over it to absorb reflections
a member of another forum suggested maybe the headphones were too loud and bleeding through. which i've never heard it 'causing phasing issues, but it might be it. 'cause the talent seems to be hard of hearing a little bit and had me turn it up pretty loud (compared to other talents). then he commented on how he hopes he doesn't feed back....however, i didn't notice anything during tracking. hmmmm
 
If you are experiencing drift to left and right with a center panned mono track, you either have it going through an effect, or some other kind of mixer problem.
 
are you running all your equipment through a power conditioner? voltage spikes and dips can have nasty effects on a recorded signal. anything from popping/clicking in the recordings, to causing one side of whatever power amp or active speakers you are using to duck in and out. its happened to me alot especially when you are using equipment with walwarts. the power may have been consistant with the previous session then run a muck for this session do to dc runoff from leakage due to a nasty AC signal during the recording process or some other issue. the right/left ordeal would lead me to believe its not in the recording (which would be impossible) but due to a power supply problem in either the mixer bussing curcuit or in your power amp(s). also, try listening to the recording several times. does the issue happen in the same spot every time? if not, then it has something to do with your equipment.

or maybe you just smoked a little too much reefer before the session... :D

the kid
 
thanks guys.
it's not an effect 'cause i've bypassed everything on the tracks and i never run a VO track through processing during tracking.
everything in the studio is on clean power supply. Actually almost everything in the building is on separate, clean power. We have two outlets in the studios...an orange one and a normal black one; the orange one being clean. And I'm pretty sure, every peice of audio equipment is plugged into these outlets, however I will check when I get to the office
Thanks again
 
bennychico11 said:
thanks for the reply
i'm pretty sure it's a phasing issue. the mono signal keeps changing in volume in different channels of the stereo spectrum. for awhile it seems okay, then it seems to drift over to the right channel a bit more, then back to the left, then dead center....you kinda know when it's phasing 'cause it bugs the hell out of you.
Click to expand...
Now come on dude, you know then that's no mono-preamp thing. :rolleyes: :D
That last center wandering you mentioned sounds like polarity swapped on one of the monitors, but I suppose that's not likely..
Could be loosing a tweeter?
Weird.
Wayne
 
lol, yeah i know i know
well, turned out to be something stupid....as usual.
something as stupid as one of the terminals on the speaker wasn't pushed in all the way....i must have bumped it the other day.
it's crazy how the stupid little things confuse the hell out of you
 
You know, sometimes technical mumbo jumbo is completely useless. lol.

I think it can be summed up in one simple, timeless statement....

SHIT HAPPENS. lol
 
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