8
by papyaigri_Archive
n.c. wrote:steve wrote:n.c. wrote:the one thing i'd love to hear more about is how to check for phase with that many mics, and specifically between the 3 sets of ambient mics.When mics get a few feet from each other and the thing you're recording, they will have an essentially random phase relationship with the other mics. Polarity is not the same as phase, but also I don't subscribe to the the notion that absolute polarity is important.What I do is build the basic balance of the drum kit, with the close mics all up and working well on a per-drum basis, then test to see if flipping the polarity of one or the other pairs of tom mics makes things sound generally better or worse. I'm usually listening for depth of resonance in the bass, harshness or squall in the cymbal bleed, attenuation of overall impression of clarity, but I can't get too specific. Whichever orientation sounds best, I leave it that way.Next I'll pull up the stereo mic in front of the drum kit and do the same thing with the polarity switches on those channels, switching them simultaneously and always maintaining a consistent polarity between the two. Whichever way sounds best, I leave it that way.Then I'll add the overhead mics and do the same thing. First get a balance, then flip the polarity and listen, leaving it whichever way sounds best.With the room mics I'll try scrolling the delay line until it sounds good, then I'll quickly flip one or the other or both mics' polarity and see if one way sounds better than another. I'll leave it whichever way sounds best.Before I had a console with polarity switches on each channel, I built some minus-theta (okay nerds, minus-phi) cables and marked them, then I used those cables on the bottom mics of whatever drum I was recording. It was a pain to swap them out so I generally just left them and it wasn't really a problem. Flipping the polarity is a quick test now, and one way or the other usually sounds better, so I indulge in it.Thank you very much, this procedure description helps a lot !
"Si vous sentez qu'il y a quatre raisons pour lesquelles une procédure peut mal se dérouler, et que vous parvenez à les contrer, alors une cinquième raison, imprévisible, va rapidement se développer"
Murphy