[arm-allstar] order of processing

[Patrick Perdue]

Actually, I was using the DCS filter on that node, but also tried the 
same with another node that had the PL filter instead. So I got the two 
confused.

Yes, I generally like the sound of the DCS filter better.

Interestingly though, when actually using DCS, I got multiple reports 
that my DCS was more obvious with the filter enabled to those who have 
significant high pass, because the clicking of the encoder was more 
pronounced with the filter on than with it off. Of course, having that 
filter off breaks lots of stuff.

I used DCS initially because the DCS decoder on about half my radios are 
not quick to respond, so I get squelch crash. DCS fixes that problem, 
but is also more annoying on TX than a filtered PL.


On 1/21/2020 12:25 AM, "Doug Crompton via ARM-allstar" wrote:

> Patrick,
>
>     Try turning off the PL filter and turning on the DCS filter - item Q.
> It is a much better brick wall filter. The reason it is sounding different
> is that the PL filter does knock off some of the low end. The DCS filter
> will also but the cutoff is different.
>
> I do this on all myradio nodes and any nodes I setup for others. I suspect
> we really should make the DCS filter the default.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
> On Mon, Jan 20, 2020 at 10:26 PM "Patrick Perdue via ARM-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
>> Hi:
>>
>> I tried something yesterday that was a partial success.
>>
>> Someone mentioned that the audio from my Wouxun HT was a little lacking
>> in bottom end, even more than those usually are.
>>
>> So, I logged into the node, took the PL filter away, and notched out the
>> frequency of the PL tone specifically. My TX audio sounded lots
>> better... but now the DTMF's just pass right through. I assume because
>> the rxnotch happens after the process that detects DTMF, which is
>> probably still hearing my PL tone and not detecting those frequencies.
>>
>> Obviously, I went back to the standard configuration with no rxnotch and
>> PL filter enabled, but it really did sound quite a lot better the other
>> way, even to other HT's.
>>
>> Just wondering what the order of DSP processing looks like for app.rpt.
>>
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