[App_rpt-users] Mini Computers

JJC cummingsj at gmail.com
Wed Feb 7 22:16:03 UTC 2018 

I took a while to think about how I wanted to respond to the "I am being
fairly picky" statement, seemingly indicating that some of us are not.  In
any event I am also (as are all of the site owners on our system) very
picky about our audio.  I stand by my statement that we have zero issues
with the audio on any of our Pi based systems.  I have never generated a
tone using the Pi, always rather a high grade tone generator to set audio
levels etc...  Again, wish that I had a silver bullet for you guys, maybe
it's just the luck of the draw?

JJC
N0PKT

On Sun, Feb 4, 2018 at 8:59 PM, Tim Sawyer <tisawyer at gmail.com> wrote:

> My experience with the 1khz tone test Skyler mentions is that it sounds
> crappy on all flavors of hardware running DIAL/ACID/Limey. Only Hamvoip
> makes a clean 1khz tone. But, has been said on here many times, it's not
> open source.
>
> On Sun, Feb 4, 2018 at 7:20 PM, Skyler F <electricity440 at gmail.com> wrote:
>
>> 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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>
>
>
> --
> Tim WD6AWP
>
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