Re: [ecasound] Issue with mixing of the files

Thanks a lot Kai, I am actually having 8 files, so I have to
use -ea:800. After that it works fine, it comes back
to -6dB original level. I am having another
issue at some places in my mixed file I have SPIKES when
I see the file in the audio file editor. These spikes
weren't there is the original files and got inserted at the
boundary where the two files join. Have you seen it before?
These SPIKES cause audible 'click'.

How can I get rid of it, if you know of a workaround.

Thanks
hemant

--- Kai Vehmanen <kvehmanen@email-addr-hidden> wrote:

> On Wed, 9 Feb 2005, Hemant Joshi wrote:
>
> > I have a number of files f1 .. fn and I just want to concatenate them
> > one after another (in time, non-overlapping). I did that by writing the
> > .ewf file for each of the .wav files. Each of those .ewf file have
> > offset set such that they come one after another in time. As a result I
> > get the output file that is a concatenation of all the f1 ... fn. This
> > is what I want but when I read it back in my audio processing tool I see
> > that the amplitude of the concatenated output file is reduced
> > significantly. Initially all the component files f1 ... fn were
> > normalized to -6 dB. Please tell me some way to have the output file
> > from ecasound also normalized to -6dB.
>
> Yes, this is one feature of ecasound, mixing is done by sum+divide,
> so if the mixed channels do not overlap, overall amplitude will be
> lower. There are two ways to work around this problem:
>
> 1) add -ea:200 to each input chain (does not lose any precision)
> 2) in the last 2.3.6 snapshots there is a new -z:mixmode,sum
> option will changes the mixing behaviour to sum-only
>
> --
> http://www.eca.cx
> Audio software for Linux!
>
>
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Received on Thu Feb 10 20:15:04 2005