[arm-allstar] 2 nodes on pi, audio goes out 1 node

[David McGough]

Hi Alan,

How is 64bit linux realistically going to help??

Going to a 64bit OS has some drawbacks. For example, the downloaded distro
would be perhaps 50% bigger in size. Further, there are really no
performance improvements to be found when running an application like
Asterisk/AllStar, which already takes advantage of the ARM 64bit math
enhancements via gcc compiler instructions, when needed.

I know some "benchmarks" found on youtube, etc., show significant
improvements between 32bit and 64bit code on the RPi3/4 boards. In every
case, these benchmarks are EXPLICITLY performing 64bit math intensive
operations or accessing large amounts (more than 2GB) of memory....This
isn't applicable to the Asterisk/HamVoIP code, which fits very 
comfortably in a 32bit footprint.

BTW, note that currently the only supported USB sound fob are C-Media 
CM108 and CM119 family devices. The Creative Sound Blaster Play 3 board 
isn't currently supported hardware.


73, David KB4FXC


On Thu, 6 Aug 2020, "Al Beard via ARM-allstar" wrote:

> Hi David,
> What if you use a 64bit linux system?
> 
> Being a new-comer I was disappointed the ARM-Allstar image wasn't 64bit.
> 
> Also, what if you use different kinds of USB FOB?
> I'm about to use the Creative Sound Blaster Play 3! because it is stereo
> in and out and "hopefully" available world-wide.
> 
> Alan VK2ZIW
> 
> 
> 
> On Wed, 5 Aug 2020 22:54:44 -0400 (EDT), \"David McGough via ARM-allstar\" 
> wrote
> > Hi Derek,
> > 
> > There is currently a kernel bug where RPi4B boards don't work with 
> > more than one USB fob.  This issue currently remains unresolved.
> > 
> > I've tried various distro releases (including Raspbian) with no 
> > success.  I've also tried Linux kernels up thru 5.4.45 on ArchLinux, 
> > still no success. I've also posted to the Raspberry Pi official 
> > forum, no answers, thus far. This bug is easy to duplicate using the 
> > ALSA programs aplay or speaker, without even having Asterisk/HamVoIP 
> > installed on the system.
> > 
> > Note that the IDENTICAL same firmware images work properly on RPi3B and
> > RPi3B+ boards and has been well tested.  So, for now, if you want to 
> > use multiple USB adapters, I recommend the RPi3B+ board.
> > 
> > Hopefully there will be a resolution to this problem soon. I'll 
> > update the HamVoIP firmware image as soon as this is resolved---but, 
> > again, this isn't a bug in Asterisk/HamVoIP/AllStar directly.
> > 
> > 73, David KB4FXC
> > 
> > -----------------------------------------------------------------------------
> -
> > Date: Thu, 6 Aug 2020 02:12:20 +0000
> > From: Derek Chauran <af7ux at outlook.com>
> > To: "arm-allstar at hamvoip.org" <arm-allstar at hamvoip.org>
> > Subject: 2 nodes on pi, audo goes out 1 node
> > 
> > Hello - I've recently added a second node to a Pi 4 following the
> > instructions provided in the config-setup PDF. Both nodes work, with 
> > one
> > (major) exception. I can see audio in to the correct soundcards for the
> > correct stanza when using susb tune rxdisplay. When call the nodes 
> > on the RF side, the correct sound card COS is activated, and the 
> > correct radio PTT gets keyed, however the audio for both nodes goes 
> > OUT of a single sound card, so one of the nodes transmits a dead 
> > carrier, and the other node transmits fine. If both are trying to 
> > transmit at the same time, I heard the audio for both out of one of 
> > the nodes, not the other. It's not always the same card either, when 
> > I restart asterisk or reboot the node, it seems to randomly decide 
> > which card will be used for audio out.
> > 
> > The nodes are:
> > 520720 - modified CM108 with 2 BF 888s
> > 520721 - SHARI
> > 
> > I've attached my configs as well.
> > 
> > 73 - af7ux
> > 
> > _______________________________________________
> > 
> > ARM-allstar mailing list
> > ARM-allstar at hamvoip.org
> > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> > 
> > Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
> 
> 
> ---------------------------------------------------
> Alan VK2ZIW
> 
> OpenWebMail 2.53, nothing in the cloud.
> 
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> 
> Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
>