[chuck-users] mac intel audio i/o problem

[Spencer Salazar]

Hi Manj,
chuck --probe labels everything as "dac#", even if it only has input  
channels.  This is somewhat confusing, but it probably wouldn't be  
the cause of your problem.

Are you familiar with the --dac, --adc and --in chuck command line  
options?  You can use these to force which devices will be used for  
audio output, audio input, and how many input channels to use.  My  
(somewhat uninformed) hypothesis is that some sensible combination of  
these options will allow an adc => dac; type program to work  
correctly on your machine.  So, you could try the following:

chuck --adc4		#specify "dac" (i.e. device) 4 to be used as input device
chuck --adc4 --in1
chuck --adc1		#specify device 1 to be used as input device
chuck --adc1 --in1

There might be some other reasonable combinations of these options  
that I've left out.  If none of this command line options juggling  
works, there could be a specific problem between ChucK's realtime  
audio subsystem and the audio configuration on newer Intel macs.

spencer

On Sep 25, 2006, at 11:19 PM, Manj Benning wrote:

> hi
>
> i am running chuck 1.2.0.7 for the first time on my mac intel.And i
> keep getting the following problem when i try running the code below
> ------------------------
> error msg:
>
> [chuck]: (via rtaudio): unable to open specified device(s) with given
> stream parameters:
> ... RtApiCore: unable to find OS-X audio stream on device (Apple:
> Built-in Microphone) for requested channels (2).
>
> [chuck]: cannot initialize audio device (try using --silent/-s)
> ---------------------
> code:
> ---------------------
> adc => dac;
>
> while( true )
> {
>      100::ms => now;
> }
> ----------------------
>
> when i do chuck --probe  (output shown below)
> all devices, regardless if they are input (adc) or output (dac) are
> shown as dacs. With inputs channels set to 2 when the imic and line
> in are single channel devices. Whats up with this?
> And the built in mic on my laptop is working just fine when i check
> through the system prefs.
>
>
> thanks
> Manj
> -------------------------------
> Macintosh-4:~/Documents/Development/chuck/code manj$ chuck --probe
> [chuck]: found 4 device(s) ...
> [chuck]: ------( chuck -- dac1 )---------------
> [chuck]: device name = "Apple: Built-in Microphone"
> [chuck]: probe [success] ...
> [chuck]: # output channels = 0
> [chuck]: # input channels  = 2
> [chuck]: # duplex Channels = 0
> [chuck]: default device = NO
> [chuck]: natively supported data formats:
> [chuck]:    8-bit int
> [chuck]:   16-bit int
> [chuck]:   24-bit int
> [chuck]:   32-bit int
> [chuck]:   32-bit float
> [chuck]:   64-bit float
> [chuck]: supported sample rates:
> [chuck]:   44100 Hz
> [chuck]:   48000 Hz
> [chuck]:   88200 Hz
> [chuck]:   96000 Hz
> [chuck]:
> [chuck]: ------( chuck -- dac2 )---------------
> [chuck]: device name = "Apple: Built-in Input"
> [chuck]: probe [success] ...
> [chuck]: # output channels = 0
> [chuck]: # input channels  = 2
> [chuck]: # duplex Channels = 0
> [chuck]: default device = NO
> [chuck]: natively supported data formats:
> [chuck]:    8-bit int
> [chuck]:   16-bit int
> [chuck]:   24-bit int
> [chuck]:   32-bit int
> [chuck]:   32-bit float
> [chuck]:   64-bit float
> [chuck]: supported sample rates:
> [chuck]:   44100 Hz
> [chuck]:   48000 Hz
> [chuck]:   88200 Hz
> [chuck]:   96000 Hz
> [chuck]:
> [chuck]: ------( chuck -- dac3 )---------------
> [chuck]: device name = "Apple: Built-in Output"
> [chuck]: probe [success] ...
> [chuck]: # output channels = 2
> [chuck]: # input channels  = 0
> [chuck]: # duplex Channels = 0
> [chuck]: default device = YES
> [chuck]: natively supported data formats:
> [chuck]:    8-bit int
> [chuck]:   16-bit int
> [chuck]:   24-bit int
> [chuck]:   32-bit int
> [chuck]:   32-bit float
> [chuck]:   64-bit float
> [chuck]: supported sample rates:
> [chuck]:   44100 Hz
> [chuck]:   48000 Hz
> [chuck]:   88200 Hz
> [chuck]:   96000 Hz
> [chuck]:
> [chuck]: ------( chuck -- dac4 )---------------
> [chuck]: device name = "Apple Computer, Inc.: Aggregate Device"
> [chuck]: probe [success] ...
> [chuck]: # output channels = 2
> [chuck]: # input channels  = 2
> [chuck]: # duplex Channels = 2
> [chuck]: default device = YES
> [chuck]: natively supported data formats:
> [chuck]:    8-bit int
> [chuck]:   16-bit int
> [chuck]:   24-bit int
> [chuck]:   32-bit int
> [chuck]:   32-bit float
> [chuck]:   64-bit float
> [chuck]: supported sample rates:
> [chuck]:   44100 Hz
> [chuck]:   48000 Hz
> [chuck]:   88200 Hz
> [chuck]:   96000 Hz
> [chuck]:
> [chuck]: ------( chuck -- 0 MIDI inputs )------
> [chuck]:
> [chuck]: ------( chuck -- 0 MIDI outputs )-----
> [chuck]:
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