[App_rpt-users] Mini Computers

Skyler F electricity440 at gmail.com
Mon Feb 5 03:20:17 UTC 2018 

Please realize, I am being fairly picky! Also, please don't mention the
HamVoip image, I know they have a precision timer, but it is not open
source!

Here is a way to tell for all you out there on a pi,

Hit DTMF *904, and listen to the 1kHz tone. Count how many times it "POPS"
or does something other than a pure 1kHz tone over a 30 second period.
Report the channel driver you are using.

Skyler

On Sun, Feb 4, 2018 at 8:12 PM, JJC <cummingsj at gmail.com> wrote:

> And uptime/load info during an active net tonight on the same system:
>
> $ uptime
>  20:10:43 up 64 days,  5:18,  1 user,  load average: 0.18, 0.18, 0.21
>
> On Sun, Feb 4, 2018 at 4:54 PM, JJC <cummingsj at gmail.com> wrote:
>
>> I am using USBRadio on one of the nodes (the first that I checked)and
>> here is my usb info:
>>
>>> *Bus 001 Device 004: ID 0d8c:013a C-Media Electronics, Inc.*
>>
>>
>> JJC
>> N0PKT
>>
>> On Sun, Feb 4, 2018 at 3:35 PM, Andrew Sylthe <asylthe at kc9ona.com> wrote:
>>
>>> I've only ever experienced strange audio issues with usbradio, and have
>>> never had an issue running simpleusb on the Pi 3.
>>>
>>> On Feb 4, 2018 3:51 PM, "Tim Sawyer" <tisawyer at gmail.com> wrote:
>>>
>>>> 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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-- 
Skyler Fennell
amsatnet.info
KDØWHB
electricity440 at gmail.com
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