[App_rpt-users] I'm back after 8 years, quick Audio interface question.

Marshall Oldham ke6pcv at cal-net.org
Wed Dec 5 04:37:25 EST 2018


Folks have used the CM108/109 and CM119 and the SSS1623, which is a
compatible chip.  

You can get a datasheet for the CM119 here:


Here is one that you can use on Amazon for $6.20 


His is another fob for $3.87 with free shipping. 


In the future the CM119B will probably be supported, just an educated guess. 


Marshall - ke6pcv 

-----Original Message-----
From: App_rpt-users [mailto:app_rpt-users-bounces at lists.allstarlink.org] On Behalf Of Steve
Sent: Tuesday, December 04, 2018 12:42 PM
To: Users of Asterisk app_rpt
Subject: [App_rpt-users] I'm back after 8 years, quick Audio interface question.

Hi I've not been on in about 7.5 years.   
Back then Jim Dixon was a regular contact and somebody I chatted with fairly often.  
So sad he is gone!  

Way back then the only supported simple sound interface was USB and required a CM108 or 109
chip and the idea of using anything else soundcardwise 
was just immediately shot down if asked.  
There were reasons (back then) for this and I think it was centered around the author not
wanting to have to deal with the issues and support of it.

I never cared about support or "all of the issues" it may cause on my end but lacked the
technical know-how to write a "generic" audio driver myself. 
A LOT of linux software is NOT soundcard driver specific and works well with just about ANY
sound interface that is on a motherboard or card or whatever.  

And I never needed the GPIO to be on the sound chip.   
Nor did I need all of the DSP functionality to be done in the CPU via the sound interface.    
I'm curious if there have been any developments since that allow more sound interfaces to work
or is it still the same and require a CM108/109 type USB device?  



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