[arm-allstar] DTMF

[David McGough]

Hi Ken,

I suspect the main reason RADIO_RELAX is enabled by default in the stock
code was that it required a re-compile of Asterisk to turn it on or off.
Re-compiling can be a tedious, frustrating and troublesome process for
inexperienced users. So, it was easier to just turn it on and not have to
deal with compile issues.  I -speculate- the decision was made to just
live with false decodes and associated audio drop-outs, rather than
dealing with user support.  "Different strokes for different folks" as the
old adage goes.

In the hamvoip release, I changed a lot of core code to make RADIO_RELAX
runtime configurable....I've come from a world of analog controllers where
users are very sensitive to unnecessary audio drop-outs.  My main reason
for making this setting run-time configurable was for emergency
situations, where it just needed to work immediately, whether the audio
quality suffered or not.

For my own curiosity, what kind of receivers are giving you decode 
troubles? And, are you using URI's or homebrew FOBs, etc.?

73, David KB4FXC




On Mon, 1 Aug 2016, Kenneth Grimard wrote:

> hi david
> 
> yes but I have had problems with my simplex link radio even after i have 
> tried
> adjust the de-emphasis settings and tried different various levels.
> 
> not all my radio's would decode properly. that is why i had turned it 
> back on
> and recompiled the allstar code.
> 
> Now why does jim dixon wb6nil have it on by default in the master 
> allstarlink source tree
> by default? there must have been a reason why he put that code in there 
> and enabled it.
> 
> turning that back on stopped all my troubles with this dtmf stuff.
> but then i had to deal with the false decoding from certain people's voices
> when this was on.
> 
> ken n1dot
> 
> 
> 
> 
> 
> On 8/1/2016 10:13 PM, David McGough wrote:
> >
> > Ken,
> >
> > In 99% of the cases, RADIO_RELAX isn't the problem. The issue is typically
> > either received audio levels or an equalization (meaning de-emphasis).
> >
> > I've -never- had a case where I needed to turn RADIO_RELAX on and don't
> > have it enabled on a single system---and, all decode every DTMF digit just
> > fine (including my Baofeng 888 portable systems).
> >
> > Anyhow, yes, there is a setting in V1.02 forward, where RADIO_RELAX can be
> > dynamically turned on/off at runtime (to enable, set: dtmf_relax=1 in
> > simpleusb.conf device stanza), no recompiling needed....However, this
> > "solution" is probably just masking the real issue and ideally should be
> > considered a temporary work-around while identifying the audio issue.
> >
> > 73, David Kb4FXC
> >
> >
> >
> > On Mon, 1 Aug 2016, Kenneth Grimard via arm-allstar wrote:
> >
> >> hi all
> >>
> >> in the hamvoip image radio relax is turned off this is what is causing
> >> your issue's.
> >> radio relax was turned off to prevent false decoding of dtmf digits from
> >> a users voice
> >> from punching small holes in the received audio but it cause some
> >> problems with
> >> some radio's where the some digits will not decode properly.
> >>
> >> in the standard allstar images from allstarlink.org radio relax is ON by
> >> default not off.
> >>
> >> if you are running the beta code that is in 1.02 for the pi 3 this can
> >> be turned back on.
> >>
> >> ken n1dot
> >>
> >>
> >>
> >> On 8/1/2016 8:25 PM, Roselito de los Reyes via arm-allstar wrote:
> >>> Hi,
> >>>
> >>> I created a simplex node and got it working. One weird thing is that
> >>> when I send DTMF commands, it does not detect the number 3 as seen
> >>> through the CLI.
> >>>
> >>> Any thoughts?
> >>>
> >>> 73,
> >>>
> >>> Lito
> >>> KK6OOS
> >>>
> >>>
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> >>
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