On 08/20/2009 05:22 AM, Michael Collins wrote:
There is no noise on those 3 beeps. In fact, for something that's been
through ulaw/alaw compression those beeps are very clean. They are
quite
short, though.
Heck yeah they're short! Steve, in your experience is there a
Matt,
For your information the tones you gave me are exactly 738Hz. If you
want to try that tone detection thing.
Cheers.
Eric des Courtis
On Thu, Aug 20, 2009 at 2:20 PM, Michael Collinsm...@freeswitch.org wrote:
On Thu, Aug 20, 2009 at 11:06 AM, Steve Underwood ste...@coppice.org
wrote:
Matt,
As is mod_vmd will not detect tones shorter then 138ms. However I
could get that value down to ~30ms at best by making a few
modifications to the algorithm.
Cheers.
Eric des Courtis
On Thu, Aug 20, 2009 at 7:51 PM, Eric des
Courtiseric.des.cour...@gmail.com wrote:
Matt,
For your
I changed
/*! Minimum time for a beep. */
#define MIN_TIME 8000
to 6500 and it seemed to work, but I'm not sure how many false positives I
will get in a real-world environment. at 4000 it fired the event like 5
times in a session, but 6500 only once. Do you think I should expect a lot
of false
Matt,
I think the only way to know for sure is to try it. I would try to get
the value as high as possible while still detecting that 738Hz sine
(with a small margin of error). Lowering the value increases false
positives rapidly.
Eric des Courtis
On Thu, Aug 20, 2009 at 8:36 PM, Matthew
On Thu, Aug 20, 2009 at 6:36 PM, Matthew Fongmattdf...@gmail.com wrote:
/*! Minimum time for a beep. */
#define MIN_TIME 8000
to 6500 and it seemed to work, but I'm not sure how many false positives I
will get in a real-world environment. at 4000 it fired the event like 5
times in a session,
On Thu, Aug 20, 2009 at 9:16 PM, Gabriel Gundersong...@gundy.org wrote:
On Thu, Aug 20, 2009 at 6:36 PM, Matthew Fongmattdf...@gmail.com wrote:
/*! Minimum time for a beep. */
#define MIN_TIME 8000
to 6500 and it seemed to work, but I'm not sure how many false positives I
will get in a
On Wed, Aug 19, 2009 at 1:43 AM, Matthew Fong mattdf...@gmail.com wrote:
Hi Eric,
Thanks for these recommendations.
for vmd-not-panasonic-home-ans.wav changing MAX_FREQ to 1450 WORKED!
but I'm still having problems picking out the ~750Hz beep of sprint,
tmobile, and verizon. I tried first
my bet is if mod_vmd is not getting them that they are not going to
work with tone detect either. Someone needs to look at the tone and
see what frequencies are really involved and if they change throughout
the beep.
Mike
On Aug 19, 2009, at 12:41 PM, Michael Collins wrote:
On Wed,
Can anyone recommend a tool to analyze the wave files to see what's causing
the sine wav not to be detected? I have them zipped at
http://bandcon.hellohunter.com/vmd_wav.zip
http://bandcon.hellohunter.com/vmd_wav.zipI was trying to use audacity,
but not sure how to tell the exact frequency.
On 08/18/2009 05:15 AM, Eric des Courtis wrote:
Matt,
Okay the good news is vmd should be able to handle these cases. The
bad news is for whatever reason they are not getting detected at the
moment.
vmd-not-panasonic-home-ans.wav is a sine at ~1400Hz you can change
MAX_FREQ to 1450 and
There is no noise on those 3 beeps. In fact, for something that's been
through ulaw/alaw compression those beeps are very clean. They are quite
short, though.
Heck yeah they're short! Steve, in your experience is there a practical way
to detect a beep that short without chewing up system
Matt,
Okay the good news is vmd should be able to handle these cases. The
bad news is for whatever reason they are not getting detected at the
moment.
vmd-not-panasonic-home-ans.wav is a sine at ~1400Hz you can change
MAX_FREQ to 1450 and play with MIN_AMPL if that still doesn't help.
The
Matt,
You must first capture the audio beeps and verify that they are sine
waves. If not, simply tweaking the algorithm will not give you better
results.
It might be possible to use FFT and I would be happy to help you
implement such a solution but keep in mind FFT is very very demanding
on the
I tried emailed Eric, seeking advice on this, but his email (the one in the
source code) is bouncing email (invalid user), so thought I would ask here
instead. If anyone has eric's new email address, I'd be interesting in it.
I did some tests with mod_vmd this afternoon, but I'm only finding
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