see: http://www.fluxhome.com/products/analyzer_modules/pas_surround
On Mon, Dec 7, 2015 at 7:13 PM, David Pickett <d...@fugato.com> wrote: > Apart from the obvious measurement of the amplitude and phase of the > individual signals, which I do, I only have access to two ways of visually > monitoring surround signals. > > I have always found a phase meter very informative in stereo. There is > the centre zero "correlation" meter type, either analog or with LED bars, > and the oscilloscope L/R or M/S method which I find less useful. Having > written that, I must say that I find the "Vector scope" in RME's Digicheck > works well. This is an oscilloscope display but there is the option of > AGC, and the rise and fall times are adjustable. > > Digicheck's surround visualisation includes phase meters between all the > channels of the "correlation" type and a synthesized two dimensional > display which assumes five channels in the directions of 5.1. If there is > sound on one channel, one sees a line pointing in the direction of the > relevant loudspeaker. Two adjacent channel produce a triangle, one apex at > the centre, four a quadrilateral, etc. Thus the space between the channels > is filled in, although to me this conveys no real information. One can > read the individual phase meters, which are mostly of use with tones, or > read the position of the corners of the display to see the relative > magnitude of the levels in each channel. (There are also separate level > meters on the same panel.) > > The other surorund display that I have is in Samplitude, and also assumes > 5.1. This produces cigar shaped signals for individual channels, coming to > a point at the origin, but very rounded at the outer end. Two front > signals will fill in the space between the L&R cigars, etc. Other than > that, I have been uinable to discover how it works. With this display, one > can see if a single channel is low or high in level, and gauge the relative > levels of F and B. But there is no indication of the coherence, or lack of > it, between channels. > > On a stereo phase display, such as that in Digicheck, one can readily see > if a mono signal has been placed in the stereo by means of a panpot; but > this cannot be seen in either of the surround visualizations that I have. > > What might work would be the Digicheck stereo display modified such that > signals in the front half on the soundfield are placed in the top half of > the display, while the rear half is in the lower part. Then it might be > possible to distinguish between panpotted signals and coherent pairs. > > I'd be very interested to know about other methods of visualizing surround > -- in the horizontal plane, at least to start with. In my experience I can > tell a lot about a stereo signal by watching the level and phase meters, > and I would like to be able to do also in surround. > > David > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > edit account or options, view archives and so on. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20151208/cd552afe/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
