I know what AIFF (**.aif), Wave (**.wav) and even Sound 
Designer II (**.sd2) are,.....

UCSB, is Uni of Cal Santa Barbara?

IMO??? forgot what that was.
CAF,... saw that in some lit recently, but forgot what it was.
Circular Audio Field???

Sorry for my momentary forgetting.

-Partev


===========================================================

--- audiodidact@gmail.com wrote:

From: Eric Lyon 
To: csound@lists.bath.ac.uk
Subject: Re: [Csnd] Re: multichannel feature request for soundin
Date: Fri, 1 Apr 2011 13:09:47 +0100

On   Fri,   Apr   1,   2011   at   10:25   AM,  Richard  Dobson
 wrote:

On 01/04/2011 08:31, Eric Lyon wrote:

  Hi John,
  It might be worth doing the modification you suggest in any case,
  and then
  future opcodes would benefit from a more straightforward channel
  specification scheme. I'd also suggest modifying Csound so that the
  channel
  output profile is determined on a per-instrument basis, rather than
  globally
  with nchnls.
  In any case, the current 24 channel limit is too low. For example,
  BEAST at
  Birmingham deploys over 100 speakers. SARC is currently at 48 with
  plans for
  further expansion. The UCSB Allosphere has around 500 individual
  speaker
  elements.

  Those are presumably outputs? I think it is 4th order B-Format that
  requires  a  25  channel format for full periphony (rare for
  Ambisonics to fill a tidy multiple of 8!). For large channel
  widths, the old and loved (?) AIFF and WAVE file formats rapidly
  run out of space, being limited to 4GB; the more so of course if
  the new and loved (?) high-precision 24/96 formats are used. So
  worrying about supporting 500 channel AIFF files (much less 2000
  channels) is IMO a waste of nerves.

I reiterate my claim that 24 channels is too low a limit.
Eric

  It would have to be either CAF, or one of the semi-hacked 64bit
  version of WAVE - w64 being IMO preferable to the mess that is
  RF64, despite the latter being endorsed by AES and EBU etc.  I know
  libsndfile has support for CAF, so that in principle Csound has too
  (but I think no flag to specify it yet - it still relies on flags
  rather than reading file extensions, which I still find weird) but
  I am not sure how comprehensive - examples are not exactly numerous
  online. I find it hard to believe that the Allosphere folk would
  actually need to store 500-channel soundfiles; and impossible to
  beleive they will be using any 32bit capacity file format to do so!
  Richard Dobson

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_____________________________________________________________
Netscape.  Just the Net You Need.


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.caf is apple core audio format.

http://en.m.wikipedia.org/wiki/Core_Audio_Format

John C


John Clements

On Apr 2, 2011, at 7:19 PM, "Partev Barr Sarkissian"  wrote:

> I know what AIFF (**.aif), Wave (**.wav) and even Sound 
> Designer II (**.sd2) are,.....
> 
> UCSB, is Uni of Cal Santa Barbara?
> 
> IMO??? forgot what that was.
> CAF,... saw that in some lit recently, but forgot what it was.
> Circular Audio Field???
> 
> Sorry for my momentary forgetting.
> 
> -Partev
> 
> 
> ===========================================================
> 
> --- audiodidact@gmail.com wrote:
> 
> From: Eric Lyon 
> To: csound@lists.bath.ac.uk
> Subject: Re: [Csnd] Re: multichannel feature request for soundin
> Date: Fri, 1 Apr 2011 13:09:47 +0100
> 
> On   Fri,   Apr   1,   2011   at   10:25   AM,  Richard  Dobson
>  wrote:
> 
> On 01/04/2011 08:31, Eric Lyon wrote:
> 
>  Hi John,
>  It might be worth doing the modification you suggest in any case,
>  and then
>  future opcodes would benefit from a more straightforward channel
>  specification scheme. I'd also suggest modifying Csound so that the
>  channel
>  output profile is determined on a per-instrument basis, rather than
>  globally
>  with nchnls.
>  In any case, the current 24 channel limit is too low. For example,
>  BEAST at
>  Birmingham deploys over 100 speakers. SARC is currently at 48 with
>  plans for
>  further expansion. The UCSB Allosphere has around 500 individual
>  speaker
>  elements.
> 
>  Those are presumably outputs? I think it is 4th order B-Format that
>  requires  a  25  channel format for full periphony (rare for
>  Ambisonics to fill a tidy multiple of 8!). For large channel
>  widths, the old and loved (?) AIFF and WAVE file formats rapidly
>  run out of space, being limited to 4GB; the more so of course if
>  the new and loved (?) high-precision 24/96 formats are used. So
>  worrying about supporting 500 channel AIFF files (much less 2000
>  channels) is IMO a waste of nerves.
> 
> I reiterate my claim that 24 channels is too low a limit.
> Eric
> 
>  It would have to be either CAF, or one of the semi-hacked 64bit
>  version of WAVE - w64 being IMO preferable to the mess that is
>  RF64, despite the latter being endorsed by AES and EBU etc.  I know
>  libsndfile has support for CAF, so that in principle Csound has too
>  (but I think no flag to specify it yet - it still relies on flags
>  rather than reading file extensions, which I still find weird) but
>  I am not sure how comprehensive - examples are not exactly numerous
>  online. I find it hard to believe that the Allosphere folk would
>  actually need to store 500-channel soundfiles; and impossible to
>  beleive they will be using any 32bit capacity file format to do so!
>  Richard Dobson
> 
> Send bugs reports to the Sourceforge bug tracker
>          https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To  unsubscribe,  send  email  sympa@lists.bath.ac.uk with body
> "unsubscribe csound"
> 
> 
> 
> 
> _____________________________________________________________
> Netscape.  Just the Net You Need.
> 
> 
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
> 


Send bugs reports to the Sourceforge bug tracker
            https://sourceforge.net/tracker/?group_id=81968&atid=564599
Discussions of bugs and features can be posted here
To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"