TheAudioSynthesist Posted February 9, 2012 Report Share Posted February 9, 2012 anyone know if phase inversion is possible on the sound devices recorders? i know you can do it on zaxcom's deva series but i was curious about how to do it on the 702t/744t recorders from sound devices. i did a quick google search and found nothing. just a curiousity more than anything... thanks in advance. C Quote Link to comment Share on other sites More sharing options...
jozzafunk Posted February 9, 2012 Report Share Posted February 9, 2012 Not sure about the 2 models you mentioned but the 552 has it on channel 2 I believe, it's actionable using a combination of the pfl lever and one of the other setting buttons - Quote Link to comment Share on other sites More sharing options...
Marc Wielage Posted February 9, 2012 Report Share Posted February 9, 2012 Well, I know you can do M/S recording with the 744t. (Menu 29, "input 1,2, Linking, M/S.") Also p. 26 of the 744 manual. But I don't see a way to invert phase on an input. You can do this on inputs #2 and #4 of the 442 and 552 SD mixers, I believe. Quote Link to comment Share on other sites More sharing options...
taylormadeaudio Posted February 9, 2012 Report Share Posted February 9, 2012 I think the CL8 does too. ~tt Quote Link to comment Share on other sites More sharing options...
Rob Lewis Posted February 9, 2012 Report Share Posted February 9, 2012 Don't see it in the manual for the 744 but it is available on each input for the 788. Quote Link to comment Share on other sites More sharing options...
TheAudioSynthesist Posted February 14, 2012 Author Report Share Posted February 14, 2012 awesome. thanks for the info guys. this should prove useful when having to do mix downs on set. Thanks! Quote Link to comment Share on other sites More sharing options...
Sprotnik Posted July 28, 2012 Report Share Posted July 28, 2012 I would like to know what are the situations that you need to change the phase of a mic, mixing mics in a single recording track like raido + radio or radios +boom,... what if you are recording each mic in it´s own track, in a multitrack recorder? do you correct the phase? or you just leave it to postproduction crew? Quote Link to comment Share on other sites More sharing options...
soundslikejustin Posted July 28, 2012 Report Share Posted July 28, 2012 I would like to know what are the situations that you need to change the phase of a mic, mixing mics in a single recording track like raido + radio or radios +boom,... what if you are recording each mic in it´s own track, in a multitrack recorder? do you correct the phase? or you just leave it to postproduction crew? You only correct phase BECAUSE you have multiple mics interacting with one another. There is no reason to correct phase for an iso track, but seeing as phase inversion USUALLY takes place pre-fader, the phase you decide on for the mix will be the phase that the iso gets as well. If you're not attempting a mix and are recording each mic individually to it's own track, then just leave the phase up to post. Quote Link to comment Share on other sites More sharing options...
Sprotnik Posted July 28, 2012 Report Share Posted July 28, 2012 so multitrack recorders have the phase inversion just for the two channels reference mix? when you talk about iso track you mean one signal in each track, right? (it´s an english tech term i didn´t know) thanks!! Quote Link to comment Share on other sites More sharing options...
Jeff Wexler Posted July 28, 2012 Report Share Posted July 28, 2012 Phase Inversion switches are usually on the INPUT setting and are used to correct for sources that are out of phase ELECTRICALLY (wiring) with each other. For example, two different microphones (internally wired differently for whatever reason) plugged into your mixing panel and combined (mixed) to one output bus, you will have phase cancellation (level will drop at the null point) and this cancellation is corrected by use of the Phase inversion switch. It is important to have everything in phase, electrically (not to be confused with acoustical phasing), even when recording to individual isolated tracks ("isos"). It is important as well that the MIX track in phase with the ISO tracks. I would not leave it up to post to sort this out. There is the possibility that when mixing the iso tracks that have signals out of phase with each other, the cancellation will not be noticed and it will be assumed that there were just level disparities. You can be thankful that most professional gear, microphones, etc., will be wired in phase with all other industry standards, but there are times when electrical phase may be an issue. For example, I use Zaxcom wireless transmitters with DPA lavs almost exclusively, but I do have a few Sanken COS-11s which I use ocassionally. For reasons that I cannot explain, both microphones are wired properly to work properly with the transmitters, but they end up being out of phase. So, when I use DPA lavs and Sankens together, I have to flop (or invert) the phase on the output of the receiver that is using the Sanken. Flopping the phase gives me the ability to mix all the wireless (lav mic) sources and possibly the boom mic (hard wired but in phase with everything else) without any cancellation problems. Quote Link to comment Share on other sites More sharing options...
rofin Posted July 28, 2012 Report Share Posted July 28, 2012 Phase invert on the Side channel of an MS pair is also useful to correct the resultant left / right inversion when switching from micing from above to below. Or for when you've just put it on the boom upside down Quote Link to comment Share on other sites More sharing options...
Sprotnik Posted July 28, 2012 Report Share Posted July 28, 2012 thanks for your comments!! Quote Link to comment Share on other sites More sharing options...
BAB414 Posted July 30, 2012 Report Share Posted July 30, 2012 I always thought that if you theoretically had two signals that were exactly 180º out of phase acoustically, that this could be corrected by flipping the phase of one of the signals (electrically) in your mixer. Is this not the case? Is the phase switch then really only there to correct for incorrectly wired cables? Quote Link to comment Share on other sites More sharing options...
studiomprd Posted July 30, 2012 Report Share Posted July 30, 2012 " thanks for your comments!! " and " Is the phase switch then really only there to correct for incorrectly wired cables? " --NO wikipedia is your friend...(hint: BTW, we are discussing audio signals) or Jay Rose's books at www.dplay.com, among others. Quote Link to comment Share on other sites More sharing options...
RPSharman Posted July 30, 2012 Report Share Posted July 30, 2012 On 788T, slide channel switch to show input menu. Brightness button toggles phase. Symbol lools like 0 with diagonal line through it. IIRC (I'm getting better at web lingo). Quote Link to comment Share on other sites More sharing options...
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