Re: real time voice capture
Re: real time voice capture
- Subject: Re: real time voice capture
- From: Bill Stewart <email@hidden>
- Date: Wed, 4 Jun 2003 14:59:28 -0700
All the links to both available docs and example code can be found at:
http://developer.apple.com/audio
To get the more complete set you should become a registered apple
developer (its online, takes 5 mins, and its free!) so you can get the
CA - SDK...
Bill
On Wednesday, June 4, 2003, at 12:33 PM, Tim Dorcey wrote:
Can anyone point me to documentation or sample code for recording a
contiguous sequence of 50 msec audio samples in OSX? The documentation
search at developer.apple.com has me quite stumped. I can find the
Core
Audio architecture diagram, and a lot of stuff for writing device
drivers,
but am somehow not finding the root of the Core Audio documentation.
I have a Carbon application which uses SPBRecord to do what I need,
but am
getting very mysterious results on some OSX systems. OSX systems seem
to
ignore our SPBSetDeviceInfo request for mono recording, so I have been
averaging the 2 stereo channels, if that's what the device returns.
This
works fine on some systems, but I get a "Darth Vader" voice effect on
others. Picking one or the other of the channels did not seem to help.
Other odd thing, is I use the SGSettingsDialogue to let users
configure the
audio input device, and some have discovered that switching the
(playthrough) Speaker setting Off and On a few times fixes the
problem, but
this does not work for all.
I was thinking maybe simplest thing is to re-write the capture code to
use
OSX Core Audio, but can't even get off square 0 to find the
documentation.
Am I right to guess that this will be relatively easy to drop into a
mach-o
build that is otherwise Carbon compliant? Or had I better keep
pressing to
find why the Carbon capture does not work?
Thanks for any help,
Tim
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