Re: [SoX-users] Mixing in a repeating track into a song

[Wojciech K. <web...@wo...>]

robs wrote:

>>   One thing that's left is the clipping that occurs when using the 
>> compander.
> 
> The usual way to deal with this is using the compander's gain parameter: try
> reducing it by a dB or 2.

  Ok, so before I describe the problem, let me remind you how the script 
works - first I take the lector track and generate a randomized lector 
track with speed, rabbit, allpass and pad applied. Then I generate 
another one and concatenate them. This is repeated until the combined 
lector track is long enough, at which point it is mixed together with 
the song track using a compander effect and -v 0.5 on the lector and -v 
0.4 on the song.

  Now the problem: I reduced the compander gain parameter from -8 to -10 
- that took care of the clipping from that effect. But there's still 
clipping from rabbit and allpass. I tried decreasing the volume using 
the vol effect to sort this out, but it didn't help at all and the 
volume did decrease. So I used -v instead of vol. I had to go down all 
the way to -v 0.5 to get rid of the clipping altogether. BUT that made 
the combined lector track too quiet. So I tried -v 0.5 for the combined 
lector track and -v 0.3 for the song in the last mixing step, but I 
think the end result is not good enough.. The lector isn't *very* quiet, 
but considering the types of music we're going to be dealing with - I 
think this is not the way to go.

  So here's my question:

  Should I *care* about the clipping in the lector tracks ? I'm no 
audiophile, but it seems to me, like the clipping doesn't produce 
significant effects, but maybe I'm just tone-deaf or something ;] Rabbit 
  clips around 1700 samples each time, allpass around 3000 and 
concatenation around 1500 - that's for a 10 sec lector track each.

  If you guys think it's a blasphemy to just ignore it ;] then how 
should I go about reducing it, without loosing too much volume ?

  I'll post the script to this list as soon as I get an answer and apply 
a solution. In the meantime I'll add some comments..


cheers,
Wojtek