[App_rpt-users] Audio distortion using usbradio

[Marshall Oldham]

Kevin, 

 

Well said, I was going to post something similar but you beat me too it!

 

I have never had ANY issues with audio distortion when using usbradio, then again I have never tried to run usbradio with a computer that has lower CPU performance.  

 

While simpleusb might be good for lower powered CPU based system, usbradio works fine on systems that use a reasonably powered CPU. 

 

Yes usbradio takes more CPU to run some of the DSP features that are available. 

 

I don't want folks to get the wrong impression about simpleusb verses usbradio, usbradio is not evil, they both have their place!

 

73

 

Marshall - ke6pcv

 

 

 

From: app_rpt-users-bounces at ohnosec.org [mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Kevin Custer
Sent: Wednesday, January 14, 2015 2:26 PM
To: app_rpt-users at ohnosec.org
Subject: [App_rpt-users] Audio distortion using usbradio

 

I have seen the subject line mentioned many times, and have decided to comment on it.

Not all platforms had distortion when usbradio was being used.  The 'other' distribution had a patch applied to it nearly three years ago.  Recently, the ACID distribution had the fix applied to it.  This will resolve any audio distortion that may have been present when using usbradio.  The patch is not applied automatically.  In other words, any new installations will automatically be running the new, fixed version, and any old installations will not be effected unless you choose to re-do the tuning.

Thanks go out to Jim - WB6NIL for patching the code where this problem was concerned.

While there may be instances where simpleusb is desired, especially on horsepower challenged platforms, there are no longer any distortion issues that would be circumvented by using simpleusb.  As such, usbradio is fine as the default as it is simpler to use and works just fine for most applications of this technology.

Kevin  - W3KKC




On 1/14/2015 2:55 PM, Doug Crompton wrote:

That is true but I think he is asking about usbradio. On the BBB I highly recommend simpleusb and that is the default setup mode. In general I would recommend simpleusb for Allstar on all platforms unless there is something you absolutely need on usbradio. The dsp code can and does often cause audio distortion depending on what system you are running it on. I have often seen the problem on PC's as well as small board computers. Unfortunately the default for the Acid release is usbradio and I have helped quite a few Acid users switch to simpleusb with greatly improved audio. So until the usbradio code gets updated I would stick with simpleusb.

73 Doug
WA3DSP
http://www.crompton.com/hamradio

 

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