My mixer doesn't have a phase-invert switch.Can I just make a custom T-S cable (flipping the + and - conductors) and use it to bring signal out from one channel and back into another?

It's a Soundcraft EPM-12.It has inserts on each channel, and in order to use those inserts as direct outs, you need to make a TRS insert cable with pins 1 & 3 jumpered together. So I'm not sure those inserts would work for this.The aux outs are balanced, so maybe I could use one of those to bring the side channel out of the mixer (and then back in, with + and - conductors reversed)?edit: UpdateYes, that worked. Holy shit it sounded good.

bassdriver wrote:if I'd use an XLR split cable to record the figure of 8 signal (into mic preamp), do I just flip pin 2+3 of one of XLR connectors to record the - side? and do I power the mic with just turning on the phantom power on the + input channel?Why not split the line-level signal from the preamp output? I d think that using a single preamp wild increase the amount of cancellation you d get when summing the two inverted signals together, and that s crucial to M-S, no?

Running a mic into two channels with a splitter cable while running phantom power up one leg sounds like the sort of thing that could have unintended consequences.

if I'd use an XLR split cable to record the figure of 8 signal (into mic preamp), do I just flip pin 2+3 of one of XLR connectors to record the - side? and do I power the mic with just turning on the phantom power on the + input channel?

bassdriver wrote:if I'd use an XLR split cable to record the figure of 8 signal (into mic preamp), do I just flip pin 2+3 of one of XLR connectors to record the - side? and do I power the mic with just turning on the phantom power on the + input channel?Wouldn't you create some impedance issues by splitting the output of the mic to two preamps? You'd have two impedances in parallel, so you're cutting the input impedance of each in half, if they are identical, right? RIGHT?!

Do you mean split them as in the two lobes of the fig-8 pattern to separate channels? If so, that s not the goal.You want to end up with a pair of signals where one represents the Mid plus Side, and the other represents the Mid minus Side. One way to do that is take your Mid signal and Side signal and run them through a matrix (like the EA matrix that Greg builds) which does this.Another is, as you discuss, to use three channels bussed to a stereo pair: ch 1 is the Mid signal, ch 2 is the Side signal, ch 3 is the polarity-inverted Side (or -Side). So when you pan your Side signals hard left and hard right in your stereo buss, and pan the Mid in the center, one side of the stereo buss will contain the sum of Mid and Side: œMid plus Side ; the other will contain the sum of Mid and -Side: œMid minus Side .

Justin Foley wrote:Once again, I'm struck that FM bishopdante seems to live in bizarro-world where every day is opposite day.Yeah about that, I seem to be getting a lot of news reports from there? Had me worried for a bit.

Adam P wrote:bassdriver wrote:if I'd use an XLR split cable to record the figure of 8 signal (into mic preamp), do I just flip pin 2+3 of one of XLR connectors to record the - side? and do I power the mic with just turning on the phantom power on the + input channel?Why not split the line-level signal from the preamp output? I d think that using a single preamp wild increase the amount of cancellation you d get when summing the two inverted signals together, and that s crucial to M-S, no?tmoneygetpaid wrote:bassdriver wrote:if I'd use an XLR split cable to record the figure of 8 signal (into mic preamp), do I just flip pin 2+3 of one of XLR connectors to record the - side? and do I power the mic with just turning on the phantom power on the + input channel?Wouldn't you create some impedance issues by splitting the output of the mic to two preamps? You'd have two impedances in parallel, so you're cutting the input impedance of each in half, if they are identical, right? RIGHT?!thanks guys. I guess I'm at least as confused as the original poster about this. I assumed I'd have to spilt the signal of the figure 8 mic.now most recording forums suggest to simply record both mid and side mic as mono files and then copy the side mic to a 3rd track. then panning the side tracks hard left and right and invert the polarity of the copied wav file. if it's really as simple as that, I'll do so.

Adam P wrote:Do you mean split them as in the two lobes of the fig-8 pattern to separate channels? If so, that s not the goal.You want to end up with a pair of signals where one represents the Mid plus Side, and the other represents the Mid minus Side. One way to do that is take your Mid signal and Side signal and run them through a matrix (like the EA matrix that Greg builds) which does this.Another is, as you discuss, to use three channels bussed to a stereo pair: ch 1 is the Mid signal, ch 2 is the Side signal, ch 3 is the polarity-inverted Side (or -Side). So when you pan your Side signals hard left and hard right in your stereo buss, and pan the Mid in the center, one side of the stereo buss will contain the sum of Mid and Side: œMid plus Side ; the other will contain the sum of Mid and -Side: œMid minus Side .thanks Adam. I should have mentioned that I mix out of the box, and I do send the the MS signal to a stereo pair as you describe. I was actually more confused about the how to record than the playing it back.