Re: split stereo by channel and silence

Do you actually have stereo, or double mono?  Can any of the sound of the
person on left channel be heard on right channel, and vice versa?

 i guess double mono might be the right term, its a phone conversation, so
each side is completely separate mono audio.


On Tue, Jun 27, 2017 at 12:55 PM, Jeremy Nicoll - ml sox users <
[email protected]> wrote:

> On 2017-06-27 15:23, Jon Nichols wrote:
>
>> i hadn't thought it all the way through like you have so that does help
>> some thanks, this will end up a script for multiple files, but currently
>> i'm just playing with one. I did tried to split by silence first but
>> background noise on the left channel(mostly left, might have been the
>> combined noise some too) made it so there was only 3 files...
>>
>
> You maybe need to start by using  stat  or  stats  to find things out about
> sound levels in the files.  I'm sure in the past I ran some code that
> chopped
> a long file into (shall we say) a series of 5-second mini files, then ran
> stat/stats on each one, to build up a picture of levels all the way through
> the thing.
>
> If background noise is a problem I think you need to clean that up first,
> perhaps splitting the channels then cleaning them, then perhaps compressing
> them (ie reducing dynamic range) - I'm not sure - then joining them back
> into a stereo file.  Then again, increasing dynamic range might make the
> split easier, even if you compress the audio again later.
>
> Do you actually have stereo, or double mono?  Can any of the sound of the
> person on left channel be heard on right channel, and vice versa?
>
>
> another thing i just thought of, is it possible to split on the silence of
>> just 1 channel while the file is still stereo?
>>
>
> Don't know... but even if it's not, you could split the whole file into L
> & R
> then split L into L fragments, and R into R fragments, and doing that you'd
> find out (from the sizes/lengths of each fragment) where each channel's
> split
> points were.  You could then (though I don't see how it would help) merge
> those
> two lists of split points into one list and apply those to the original
> stereo
> file.
>
>
>
>
> --
> Jeremy Nicoll - my opinions are my own
>
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