On 9 June 2013 01:15, Sampo Syreeni <[email protected]> wrote: > On 2013-06-08, Fons Adriaensen wrote: > > mixed order recordings will often be played over a huge number of >>> loudspeakers. the "worst" setup i've heard my stuff on was 40. great for >>> spot localisation, but your first-order reverb will be a phasy mess [...] >>> >> >> [...] Still having at least the early part of the reverb in 'true' high >> order improves things, but it's not so easy to synthesise convincing early >> reflection matching a given space. >> > > This is off to my usual, messy tangent, but... It once came as a big > surprise to me at least that the separate orders cannot be optimally > decoded by a static, shared decoder. It might have been you who pointed > this out to me, or perhaps Angelo or Filippo, my memory fails me. In any > case, that fact has been bugging me for the longest time, because it's just > such an inelegant feature of the general framework. A blemish. > > > I think that was me - story goes Ambrose Field and I were invited to give presentations at a session at Ircam in the late nineties. On the train there (possibly when in the Channel Tunnel, but not completely sure) I was doing some back of the envelope calculations (literally, no laptop/pda/smartphone then) and became increasingly more worried when I couldn't find any way of doing mixed order decoding. Given the fact that this was when I first started thinking about eventually became FuMa a couple of years later, this made for a less than happy journey. Of course, Paris soon cured that! The only way I could (and can) see to work round it (I don't like active decoders as there are always artefacts for at least some material)) is to have either full separate B format streams for the first order only components or to have at least separate W channels for the first order only B format set and the set that also has higher order components. Messy, error prone and not good....but at least it can work.
Dave > Sursound mailing list > [email protected] > https://mail.music.vt.edu/**mailman/listinfo/sursound<https://mail.music.vt.edu/mailman/listinfo/sursound> > -- As of 1st October 2012, I have retired from the University, so this disclaimer is redundant.... These are my own views and may or may not be shared by my employer Dave Malham Ex-Music Research Centre Department of Music The University of York Heslington 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/20130619/6d1b764d/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
