[arm-allstar] re App_rpt recompile for rpt_notch

[David McGough]

Hi Duane,

The rpt_notch.c code gets included in the app_rpt.c file and then 
app_rpt.c gets recompiled....the notch code is independent of the channel 
driver.

I tried this code many years ago and it didn't solve the problem I was
having and made the situation worse by adding extra audio issues (I don't
recall what issues, it was a long time ago!)--this code is rather CPU
intensive with complex floating point math.

Anyhow, once compiled, the code gets activated by adding a "notch"  
parameter to the stanza of interest. The app_rpt code is setup to look
for up to 10 notched frequencies, using a statement like:

notch=f0,b0[...,fn,bn]  ; where n < 10

To notch a 880hz tone with a 60hz bandwidth, there statement would be:

notch=880,60

You can locate the source code here:

http://svn.ohnosec.org/svn/projects/allstar/astsrc-1.4.23-pre/trunk/extras/notch/rpt_notch.c

This has again got my curiosity, I'll compile this into my latest beta 
code and test it.  If the results are satisfactory, I'll leave the code. 
I'll report my findings in either case, success or not.

73, David KB4FXC


On Thu, 12 May 2016, DuaneVT . via arm-allstar wrote:

> Thanks for the feedback Doug. I was following your instructions for setting
> up my R-Pi2 as a node using the 1.01 image. The image has different file
> locations than DIAL references for finding the rxnotch.c to include.
> Because of that, I asked the question as to how to recompile THIS version
> of DIAL as I can't find what I need on the image. I came to the list to ask
> about this VERSION of DIAL. This is NOT about USBAUDIO true, but I needed
> help with the modified version referenced on your site.
> Sorry for stepping on toes. I'll contact the list when I have SPECIFIC
> USBAUDIO issues.
> 73,
> Duane KA1LM
>