[arm-allstar] PTT Delay idea

[David McGough]

John,

Have a look at this nifty little compressor/limiter board. I'm using them 
now for solving mic audio issues and they work GREAT!

They should work just as well for RX audio, after adjusting the levels.


https://www.ebay.com/itm/332468614881



73, David KB4FXC




On Tue, 5 Mar 2019, "John Griffith via ARM-allstar" wrote:

> Well then that answers that. I can wait. Thank you. 
> 
> Right now, my wife's voice on the ID'er is over deviated the first 200 ms as
> my leveler's attack time is slow,
> But at the same time recovery is slow so that normal conversation afterwards
> doesn't sound compressed
> like a commercial broadcast AM radio signal does. 
> 
> The network I'm on encourages people to hold the mike key down a full second
> before they talk so that all the
> entire network can key in order not to cut off their first words. It's an
> issue.  There's usually plenty of time to knock the
> leveler down before PTT. Was wanting to take advantage of that time.  Sounds
> like your update will make this moot.
> 
> Oh, ALC is automatic level control. 
> 
> Again, thank you for all you do.
> 
> -----Original Message-----
> From: ARM-allstar <arm-allstar-bounces at hamvoip.org> On Behalf Of "Doug
> Crompton via ARM-allstar"
> Sent: Tuesday, March 05, 2019 12:00 AM
> To: ARM Allstar <arm-allstar at hamvoip.org>
> Cc: Doug Crompton <wa3dsp at gmail.com>
> Subject: Re: [arm-allstar] PTT Delay idea
> 
> John,
> 
>  I think you contradict yourself because you want audio to level before PTT
> but you tell people to hold PTT for a few seconds before they talk. That
> does not make sense. Then there would be carrier without audio. What is this
> ALC? A good audio limiter/compressor should be almost instantaneous in
> response. Are your levels really that wacky? Perhaps the users need to set
> their levels better! You could delay PTT any amount you want with a rather
> simple circuit but remember you are cutting off the beginning of the
> transmission by that amount.
> 
> On a side note we will be introducing a new channel driver later this year
> that will allow you to use a SW limiter/compressor with custom settings.
> 
> 
> *73 Doug*
> 
> *WA3DSP*
> 
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
> 
> On Mon, Mar 4, 2019 at 7:50 PM "John Griffith via ARM-allstar" <
> arm-allstar at hamvoip.org> wrote:
> 
> > I was wondering if there's a way to delay PTT for 200 milliseconds 
> > (but
> not
> > the audio stream) so that my ALC can properly level out before 
> > anything
> is
> > heard on the repeater?  The people on the repeater network I'm on are 
> > pretty good about holding the key down for a second or 2 before 
> > talking, so it would be a big deal.
> >
> > Another option I was thinking about would to have a tone or white 
> > noise
> or
> > anything really.. keep the ALC circuit busy and leveled during times 
> > of non-transmit.  Anyone have an idea?  I already have a burst of 
> > noise at
> the
> > very beginning of the repeater ID, I would just want that to be during
> the
> > 200ms.
> >
> > John
> > N7OKN
> >
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