I should have said "storing pre-decoded signals in a compressed format has less potential to be problematic" since phase errors likely to upset pre-decoded material would probably also cause problems with stereo which hopefully would have been picked up and dealt with during testing. I should say here that that's just what I feel likely to be the case, I can't say that I've actually tested it.
Dave On 25 October 2017 at 11:30, David Pickett <d...@fugato.com> wrote: > At 09:55 25-10-17, Dave Malham wrote: > > > Just a word of warning, take care using compressed formats like mp4 for > >storing B format. If the compression used is lossy, this can screw up the > >decoding since phase errors can result in the sum and difference equations > >involved producing wrong results. Of course, storing pre-decoded signals > in > >a compressed format doesn't suffer from this. > > Dave, > > I always add add shelf filtering and then decode from B format to 4.0 > before encoding to MP4. I dont see why there should not also be phase > problems with encoding 4.0 signals in MP4 (why do you say not?); but I have > never noticed any. > > 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. > -- As of 1st October 2012, I have retired from the University. These are my own views and may or may not be shared by the University Dave Malham Honorary Fellow, Department of Music The University of York York YO10 5DD UK 'Ambisonics - Component Imaging for Audio' -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20171025/25ceb978/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.
