On 23/06/2015 08:52, Scott Hernalsteen wrote:
> Hi,
Hi Scott,
>
> I’m running WSJTX v.1.6.0 r5628 on OS X 10.10.3 and I’ve come across an odd 
> issue.
>
> I use an audio mixer to feed audio from my HF rig, VHF rig and Mac to a 
> common set of speakers.  Recently I upgraded this mixer to one that has an 
> internal USB sound card.
>
> I also use a SignaLink USB as the audio interface between my Mac and HF rig.
>
> Both the SignaLink and mixer show up as ‘USB Audio Codec’ in my audio devices.
I don't know a great deal about the way OS X Core Audio names devices 
but I would have thought that there is some way of renaming so that they 
can be differentiated.
>
> WSJTX is picking up the audio correctly from the SignaLink, no issues there, 
> however no matter which ‘USB Audio Codec’ device I select from WSJTX 
> Soundcard Output preferences, the program’s audio goes out to the mixer’s 
> sound card.
On other operating systems the sound card drivers often have a built in 
"Stereo Mix" device which is basically a loop back connection that is 
useful for connecting audio software back to back, when it is used is 
directs all audio sources to all audio sinks. What you seem to be seeing 
is similar except that it also crosses multiple sound cards.

Is there a way of disabling the mixing to see if the extra sound card 
works more normally and can be selected uniquely as an output?
>
> OS X itself can differentiate between the two, if I chose one as the default 
> output device, system sounds go to the mixer while the other sends them to 
> the SignaLink so this seems to be something specific to how WSJTX references 
> the output audio device.
This may well be an issues that only the Qt developers can address as I 
don't think there is anything available in the Qt audio interface we 
have access to from WSJT-X.
>
> Let me know if you need any additional information.
>
> Thanks!
>
> Scott D. Hernalsteen/W8CQD
> FCC Licensed Amateur Radio Operator
> (Amateur Extra Class)
> www.w8cqd.com
>
> "To preserve liberty it is essential that the whole body of the people always 
> possess arms and be taught alike, especially when young, how to use them..."
> - 1788 Richard Henry Lee
73
Bill
G4WJS.

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