[pulseaudio-discuss] want to know how to prevent pulse audio from connecting to an external USB sound card

[Bill Turner, WB4ALM]

On 01/02/2013 09:57 AM, David Henningsson wrote:
> On 12/28/2012 02:54 PM, Bill Turner, WB4ALM wrote:
>> I am a Radio Ham, and have an external USB sound card (SignaLink USB)
>> that functions as a control device for one of my Radio Amateur
>> Transmitters.  The Signalink USB acts as an interface between the
>> transceivers mike input and speaker output and allows me to encode and
>> decode digital signals sent over the air with any of a series of
>> computer programs. (I prefer the use of "fldigi")
>>
>> I have had the Signalink for about a month, and it works great - EXCEPT
>> when pulseaudio "attaches" it as an audio card to be controlled...
>>
>> I can not figure out how to keep my Ubuntu 12.10 system from
>> interferring with the intended use of this card.
>
> If you know how to write udev rules, the recommended way to go is to 
> write one to tell Pulseaudio to ignore your card by setting 
> ENV{PULSE_IGNORE}="1".
>
> Look at /lib/udev/rules.d/90-pulseaudio.rules for inspiration. We have 
> a rule there for ignoring a strange sound card created by the 
> thinkpad-acpi driver.
>

Thanks for the hint...
...I'll look into that.

/s/ Bill Turner, wb4alm