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

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

Hello


   I couldn't find a search option for the list archives at sf.net, so I
decided to describe my problem here, since the man pages didn't really
solve it for me.
   I'm creating a website that will sell music and I need to create
various versions of each song provided in wave format. Among other
things, I need to create separate versions as previews - they will be
the exact same songs as those for sale, only with a lector mixed in,
repeating some text once in a while. The thing is, just mixing in the
lector track once is not enough - it should repeat periodically until
the original track ends, so the trivial soxmix orig.wav lector.wav
output.wav won't cut it. How should I go about this ?
   We won't be using any DRM, so I want to at least make sure that
cutting the lector out won't be easy. Audio manipulation is completely
beyond my expertise, so any hints on how to achieve this and perhaps
what additional options would make sense, would be greatly appreciated.


cheers,
Wojtek Knapik


PS. I decided to do that on wave level and then generate mp3 and ogg
versions, but just out of curiosity - would it be feasible to just
generate the mp3/ogg files and mix in the lector on the fly ? I have a
2x Quad Core Xeon, 4GB RAM and 6x300GB SAS 15krpm disks in a RAID10 at
my disposal.