[Asterisk-Users] DTMF inband detection improvement

[Mark Eissler]

On Feb 16, 2005, at 10:34 AM, Steve Underwood wrote:

>>
>> BTW, Steve, if you're still reading, what is the RADIO_RELAX option 
>> intended to be for in dsp.c?
>
> It is something someone else added to the code to make the detection 
> criteria in relaxed mode even more relaxed. If setting that helps, 
> something in your channel must be causing some serious filtering of 
> low frequencies. Can you try logging the audio to a file, and send it 
> to me for analysis? chan_spy, or something like that, should do the 
> job.
>

Actually, it was Florian that posted about this option. I haven't tried 
it (spent an awful lot of time last week compiling different 
configurations of stable, head, patches...taking a break this week). 
This is Florian said:

On Feb 15, 2005, at 1:12 PM, Florian Lefeuvre wrote:

>
> I find the compilation option RADIO_RELAX.
> this option change a threshold in DTMF detection (function dtmf_detect 
> in dsp.c)
> I remark an big improvement in the detection of the dtmf over GSM.
> have you ever test this option?
> RADIO is obscur for me, does it mean all wireless device?
>
> Florian

-mark

--
Mark Eissler, mark at mixtur.com
Mixtur Interactive, Inc. - at - http://www.mixtur.com