Re: Reading and writing from/to sound devices without AU
Re: Reading and writing from/to sound devices without AU
- Subject: Re: Reading and writing from/to sound devices without AU
- From: Rick Mann <email@hidden>
- Date: Wed, 09 Mar 2011 18:10:41 -0800
On Mar 9, 2011, at 17:53:42, Paul Davis wrote:
> On Wed, Mar 9, 2011 at 8:49 PM, Rick Mann <email@hidden> wrote:
>> In my rather specialized audio processing, I may not be able to use Audio Units as I had hoped.
>
> you haven't said why.
I'm doing DSP on the data from a software defined radio. It presents itself as an audio device to avoid requiring custom drivers.
But some processing can result not in audio data, but arbitrary digital data. I need to constantly get samples from the device, and push them into my processing pipeline, rather than relying on Core Audio to pull data from my audio units. If I choose not to output audio, AU would probably stop processing. Also, shoehorning in an output stream of ASCII characters into an AU seems inelegant, at best.
>
>> If I want to write code that reads samples from an audio input (or non-audio source of streaming data), process them, and write audio samples to an output >device like the built-in speaker or headphones (or a file, or all of the above), what is it that I want to look at?
>
> at the risk of being a bit self-aggrandizing, if you *really* can't
> use AU and CoreAudio in general, you might consider looking at JACK
> (http://jackaudio.org/). but its not clear to me why you think you
> need something other than apple-provided tools.
>
> --p
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