News:

Please begin sharing multitrack files as FLAC files. Read more here!

 

Author Topic: Guitar phase issues really delay? Facade and Blood to Bone  (Read 2248 times)

  • No avatar
  • ****
October 19, 2011, 06:47:44 PM
I have been trying to understand the phase issues and it wasn't until I saw Spede's post with the track pictures that it made sense.  Some of the guitar feeds/tracks are delayed from the one getting sound first.  If you line them up it seems to me that the issue is fixed because the gap is not so great that actual significant phase issues occur?  As such this as JohnSuitecase said is a comb filter issue. The reason I was confused was because to me a phase issue is one where the sources are coincident in time but out of phase. Like top and bottom snare mic set up.

As such isn't this all fixed by lining up the feeds to the first one (s) that get sound?  

I sent  a message to Mike asking the same questions because as far as I can see he didn't move the tracks in his article(?) So I am still confused.
Equipment-Trends Micro amp w/ Paradigm Export speakers ports covered.  Use Fx EQ for  studio room issue fix.  Also use Klipsch S4 & Sennheiser HD-280 phones - home stereo= AMC 3030 tube amp, Triangle Celius 202 speakers & Behringer para EQ for room nodes-laptop=HP 8430 w/Digigram VXPocket & Reaper

  • No avatar
  • ***
October 19, 2011, 07:10:16 PM
well if you have two tracks containing the same than they will be align 100% in phase if they are coincident. Two identical tracks can only be out of phase if the are not time aligned.

  • No avatar
  • ****
October 19, 2011, 07:15:07 PM
well if you have two tracks containing the same than they will be align 100% in phase if they are coincident. Two identical tracks can only be out of phase if the are not time aligned.

I understand they become out of phase but if playing a repetitive part they could be delayed enough to get back in phase.  So it seems to me it is worthwhile to understand if the phase issue is due to delay/distance or orientation. They are two different root causes and I think not understanding that would lead to excessive work to fix it or not the right fix.  Mics are usually, relatively speaking, pretty close to one another even when they are off. So I think once the delay is fixed the left over phase issue isn't a big deal?
Equipment-Trends Micro amp w/ Paradigm Export speakers ports covered.  Use Fx EQ for  studio room issue fix.  Also use Klipsch S4 & Sennheiser HD-280 phones - home stereo= AMC 3030 tube amp, Triangle Celius 202 speakers & Behringer para EQ for room nodes-laptop=HP 8430 w/Digigram VXPocket & Reaper

  • No avatar
  • ***
October 19, 2011, 08:03:15 PM
of course its not. Phase shifts are even one of the essential things for stereo width.

  • No avatar
  • **
October 19, 2011, 11:12:31 PM
I have been trying to understand the phase issues and it wasn't until I saw Spede's post with the track pictures that it made sense.  Some of the guitar feeds/tracks are delayed from the one getting sound first.  If you line them up it seems to me that the issue is fixed because the gap is not so great that actual significant phase issues occur?  As such this as JohnSuitecase said is a comb filter issue. The reason I was confused was because to me a phase issue is one where the sources are coincident in time but out of phase. Like top and bottom snare mic set up.

As such isn't this all fixed by lining up the feeds to the first one (s) that get sound?  

I sent  a message to Mike asking the same questions because as far as I can see he didn't move the tracks in his article(?) So I am still confused.

Two signals can be out of phase for two reasons; using to mics pointing at each other. The first mic will get att signal with positive polarity and the other with negative polarity. 180 degree cancellation. The issue with Young Griffos tracks, is that they miced the guitar with 4 mics, each with a different distance to the cab. They are out of phase beacause when the positive side of the signal hits one mic, an other mic gets a negative polarity signal at the same time, although not always 180 degrees out of phase. You could move the tracks so they start at the same time, or move them so that all tracks have positive or negative polarity at the same time. So phase is both depending on time and polarity. Hope this makes sense. Can´t explain that good in english. I´m better at swedish...