[PD] Fwd: no sound on Macos

[Adam Lindsay]

chris clepper said this at Sat, 22 Mar 2003 13:43:03 -0600:

>>Right. Well, it compiles and runs just fine on my machine when I replace
>>portaudio/pa_mac_core/pa_mac_core.c with the new one and recompile. I'm
>>just using my normal internal sound driver, though. Best I can say is "it
>>compiles, and it doesn't seem to break anything obvious."
>
>that's good news.

We take what we can get nowadays.

>>These are the changes since the last pa_mac_core.c synched with Pd:
>
><snip>
>
>the thing that sort of concerns me is that portaudio seems to need 
>patching to support every new device release for OSX.  this is not 
>good, and pretty much defeats a lot of what CoreAudio is meant to do. 

It's not as bad as that, but it is worth some concern. I think part of it
is the issue that apparently PA pitched itself a little too low in the
CoreAudio chain.

>plus the AudioConverter routine adds another buffer to the I/O chain 
>which might mean at least another 64 samples of latency on both ends. 
>pd already has a relatively high latency on OSX right now, so this 
>isn't going to help out.

True. I haven't been that concerned with latency lately, but I'm sure
it'll catch up with me later.

>>What should I do?
>CVS is a good place for testing and experimentation.  go ahead and 
>commit it and i will compile a version and give it to some people 
>using devices like the 828 and report back.

I just committed the file, as well as posted the binary (link in another
message). 

>also, i would be interested in working on a direct CoreAudio 
>implementation for pd.  i'm tied up on a project until the second 
>week in April, so i won't even take a look until then.  anyone else 
>interested in doing this?

I'm interested. Similarly tied up in the short term. I'm also suspecting
that Miller's 0.37 audio implementation will be the best foundation for this.

Cheers,
adam

-- 
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 Adam T. Lindsay                      atl at comp.lancs.ac.uk
 Computing Dept, Lancaster University   +44(0)1524/594.537
 Lancaster, LA1 4YR, UK             Fax:+44(0)1524/593.608
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