[App_rpt-users] Mini Computers

Tim Sawyer tisawyer at gmail.com
Thu Feb 8 03:52:23 UTC 2018 

App_rpt has a built in "milliwatt" for setting TX level. Setting TX level
any other way is less accurate and more difficult.

On Wed, Feb 7, 2018 at 2:16 PM, JJC <cummingsj at gmail.com> wrote:

>  I have never generated a tone using the Pi, always rather a high grade
> tone generator to set audio levels etc...
>
> 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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>>>>>>>>
>>>>>>>>
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>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Tim WD6AWP
>>>>>>>
>>>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
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>>>
>>>
>>>
>>> --
>>> Skyler Fennell
>>> amsatnet.info
>>> KDØWHB
>>> electricity440 at gmail.com
>>>
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>>
>>
>>
>> --
>> Tim WD6AWP
>>
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-- 
Tim WD6AWP
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