[asterisk-users] Pops & clicks at the end of sound files

[Steve Edwards]

> On Jun 6, 2011, at 10:51 PM, Steve Edwards <asterisk.org at sedwards.com> 
> wrote:

>> Sox has a bunch of obtuse (IMNSHO) commands. There may be one that 
>> could automagically trim the pop for you.

On Mon, 6 Jun 2011, Sherwood McGowan wrote:

> The argument is question is the trim command. If the OP wishes to find 
> an automagic method, they would need to determine the length of the file 
> in seconds, then feed the length - durationofthepop to the sox trim 
> command

Or, you could use the 'reverse' command, trim the first xxx milliseconds, 
and then reverse again. Then you don't need to know how long the file is.

Or, (and this is the one I've always thought was really cool but never 
mastered) the 'silence' command can trim leading, trailing, and excessive 
silence between words. It has 'thresholds' that may be of use to eliminate 
the trailing pop. But since I've never mastered it, I'm just guessing :)

Veering further off topic...

If somebody really knows there stuff, I suspect the highpass and lowpass 
filters could also help produce more intelligible prompts.

Anyone, anyone?

-- 
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                              Fax: +1-760-731-3000