[SoX-users] combination of splice, : and repeat

[Erich E. <er...@ec...>]

Hi,

first, I want to thank everyone involved in the development of sox for
this nice tool. Especially I like, that it's easy scriptable and thus
you can build up a complex chain of audio manipulation, which is
relyable and fine tunable.

However, what I'm missing is some effect, which combines repeat, ":" and
splice. I'll give an example for illustration:
Imagine some audio with loud and silent parts and you want to enhance
the silent parts (constant gain, not with some kind of compression), but
you don't want a hard step in amplification in between. What I use in
this case is the following clumsy combination:

<cite>
sox in.wav -p trim 0 10 : trim 0 1 repeat : | \
 sox -t sox - -p trim 0 11 gain 10 : | \
 sox -t sox - out.wav splice 11,0.5,0
</cite>

This would be much nicer in the form
<cite>
 sox in.wav out.wav trim 0 11 gain 10 :with_overlap 1
</cite>

The effect which should be applied differently to both parts does not
need to be "gain", I've also missed it for "remix", but in principle one
could think of almost every effect which sox understands. So I think,
some time-dependent gain effect won't be helping in all cases.

I'm not certain about two points:
1. Who else would like to have this (or a similar) effect in sox? (Maybe
I'm the only one?)
2. Is it even possible to implement without breaking to much of sox
piping architecture?

Greetings,
Erich