Hi, Karl, To be honest, I did not try a Lissajous pattern because, to me, the phase "strip chart" in StereoTool (stereotool.com) is far more telling. There are sections in the live program that seem to make sense. I then rely on my ears and mono mixing to hear what's up. Sometimes you can maximize the highs in one channel as well. It's just that the strip chart (and I assume other phase-comparison techniques) will mislead you with the spaced mics. In a way, this thread is a follow-on to my ARSC presentation in Bloomington. Cheers, Richard On 12/3/2016 17:30, Karl E. Fitzke wrote: > Richard, > > > Great point to bring up! You are talking about being mislead by a lissajous pattern (phase scope) or phase torch under these circumstances, right? > > > Instead the best we can do is to fall back solely on our ears and live spectrogram, trying to establish maximum high frequency response, yes? > > > -Karl > > > > Karl Fitzke > Audio/Visual Specialist > 214 Olin Library > Ithaca, NY 14853 > > 607-255-5521 > [log in to unmask] > ________________________________ > From: Association for Recorded Sound Discussion List <[log in to unmask]> on behalf of Richard L. Hess <[log in to unmask]> > Sent: Saturday, December 3, 2016 2:44:16 PM > To: [log in to unmask] > Subject: [ARSCLIST] Setting azimuth from program - a caution > > I have been digitizing a batch of tapes for a university music program's > archives. Most were made in a the several campus performance spaces, and > from the sound of it and experience, the preponderance of these > recordings were made with spaced hanging cardioid microphones. While > stereo mics were also widely used, these sound like spaced mics. > > Anyway...none of the tapes had tones and from time to time there is a > tape with an offset solo instrument. Remembering that we're looking for > fractions of a degree accuracy in adjusting azimuth playback, when we > see two separated mics, all bets are off. > > With the speed of sound being about 1100 feet per second, we can see how > moving a mic less than a foot is the length of a complete cycle at 1 kHz. > > So, this type of recording is almost impossible to accurately adjust. > While full ensembles work well with the stripchart in StereoTool, a solo > instrument or voice can show a huge azimuth error which is really an > artifact of microphone placement relative to the source. > > Cheers, > > Richard > > > -- > Richard L. Hess email: [log in to unmask] > Aurora, Ontario, Canada 647 479 2800 > http://www.richardhess.com/tape/contact.htm > Quality tape transfers -- even from hard-to-play tapes. > -- Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada 647 479 2800 http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.