[App_rpt-users] Mini Computers

Sun Feb 4 21:51:10 UTC 2018

I believe stuttering audio only happens on Pi nodes running USBradio. My
understanding is the Rasperry Pi does not have enough horsepower for
USBradio.      SimpleUSB should not a problem but if anyone knows different
please speak up.

On Sun, Feb 4, 2018 at 11:53 AM, Dave Maciorowski <wa1jhk at macski.us> wrote:

> Hi All,
>
> I'd like to know more about your setups, Jay's that are working and Jon
> and Skyler's that have issues.  Do you use simpleusb or usbradio?  What
> USB-to-audio interface are you using including the line returned by the
> lsusb command.  Here's mine:
>
> Bus 001 Device 004: ID 0d8c:000e C-Media Electronics, Inc. Audio Adapter
> (Planet UP-100, Genius G-Talk)
>
> I ask because I'm chasing an interface issue that might be related.
>
> Thanks.
>
>   Dave
>   WA1JHK
>
> On 2/4/2018 9:47 AM, JJC wrote:
>
> I wish that I had a magic formula for you.  All that I can say is that we
> run minimal setups (least possible number of running processes and
> installed packages) on the Pis and we are sure to use the correct audio COR
> interfaces etc... We also are meticulous in setting up levels using service
> monitors of all of the radios themselves.  I help to maintain a large
> system (That Skyler has used frequently in the past) which is primarily run
> on PIs and we have not had any of the issues that you guys are
> experiencing.  Wish I could be of more help, but I truly do not believe
> that it's an issue caused by the Pi.
>
> JJC
> N0PKT
>
> On Sun, Feb 4, 2018 at 8:57 AM, REDBUTTON_CTRL <jrorke at cogeco.ca> wrote:
>
>> I too have had the sputtering audio issues. Mostly it starts to degrade
>> over a few days. I have run dial on Pi2 s and HP thin clients. and so far
>> all of them need periodic reboots or asterisk restarts to clean up the
>> audio.
>>
>> I am using DIAL Full DSP with tone encode and decode. Some units have 2
>> or 3 or nodes. Even a single node pi does it.
>> So if you have a magic set up that fixes this I would like to hear about
>> it.
>>
>> In one case I had to put back a full desk top pc to keep from having to
>> re set on a daily basis.
>> Pcs dont seem to suffer from the motor boating issue.
>>
>> Jon VA3RQ
>>
>>
>> On 2/3/2018 9:26 PM, JJC wrote:
>>
>>> Skyler,
>>>
>>> I’ll have to disagree with your statements completely.  I have not only
>>> personally load-tested but I have and know of many high traffic systems
>>> that are running with zero “sputter” or issue.l on a Pi.  Several have been
>>> on the air and running for well over a year.
>>>
>>> I am also running one system in conjunction with DMRLink and transcoding
>>> audio (read a much heavier demand on System resources) from DMR<->  Analog
>>> with no “sputter”.  Granted the transcoding is offloaded to a separate chip
>>> but nonetheless.  On all of these systems running on a Pi 2 or 3 the system
>>> load from asterisk, DMRLink etc all combined never exceeds 15% and the
>>> audio is always clean ( not withstanding network craziness ).
>>>
>>> So having said all of this I would look elsewhere for what may be
>>> causing your audio ailments.  I can’t really point you in a specific
>>> direction other than to review overall system load and performance inline
>>> with general system administration best practices.  And of course standard
>>> troubleshooting methods of hardware swapping/testing and validation.
>>>
>>> JJC
>>> N0PKT
>>>
>>> Sent from the iRoad, so please ignore any typos or awesome autocorrects
>>>
>>> On Feb 3, 2018, at 18:19, Skyler F<electricity440 at gmail.com>  wrote:
>>>>
>>>> At this point, I don't think the raspberry pi audio is as good as it
>>>> could be on the raspberry pi. Even with a pi 3 on the best settings in
>>>> usbradio, it will sputter every once and a while I realize Doug has
>>>> implemented a precision timer, however, his image is not open source, and I
>>>> cannot modify, therefore not an option for me.
>>>>
>>>> What is the best mini computer hardware available for reasonable prices
>>>> nowadays that I could use in place of the pi? The raspberry pi arm
>>>> architecture just does not seem to cut the current versions of AllStar and
>>>> DAHDI. I realize how picky I am being, but I am sort of going crazy by some
>>>> raspberry pi nodes i've put together with crazy sputtering issues. And the
>>>> telemetry sometimes sounds like it is played at 1/2 speed. U
>>>>
>>>> Usbradio and simpleusb have their different problems, but neither seem
>>>> to work ok. I would actually argue usbradio works better on the pi because
>>>> it does not have an unreliable duplex audio delay.
>>>>
>>>> Do ATOM processers work well? Best suggestions here for something
>>>> lightweight and non power-hungry?
>>>>
>>>> Thank You!
>>>> Skyler KDØWHB
>>>>
>>>>
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-- 
Tim WD6AWP
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