[Asterisk-Users] Milliwatt Analyzer available

[Roger Schreiter]

Hi,

some days ago  we discused here the need for an analyzer
for the 1000 Hz tone, as opposite application to Milliwatt.

Here it is: Mwanalyze
http://planinternet.net/download/voip/asterisk/app_mwanalyze.c

It performs a Fourier analysis for a fixed frequency
and tells the amplitude.

The frequency is not limited to 1000 Hz, but can be passed
as argument. The periode duration must be a mulitple of 0.5 ms,
thus the valid frequences are: 2000 Hz, 1000 Hz, 666.666666667 Hz,
500 Hz, ...

Furthermore the application computes the ripple on that tone.
In order to detect audiogaps and short noise on the line, one can
define a treshold and a timeslice duration (typically 1s to 0.1s), and
the application will compute the ripple for each timeslice and count the
timeslices with a ripple greater than the given treshold.

Thus the application is a tool to verify the line quality, e.g. for
least-cost-but-not-too-bad-line routings.

For conveniance Mwanalyze also generates a tone of the frequency it
analyzes. Thus a bidirectional operation, and test for frequencies
other than Milliwatt's 1000 Hz are possible. Anyway Milliwatt is much
much more economic to CPU and RAM!


For details see inline documenation or output while loading
the module app_mwanalyze.so!


Now, I will try to contact to dev-list, in order to put this
application to future releases.


Roger.