Based on what I’ve read…
I’ll assume you are on a Windows Box…
if it’s launching some other app…
then it must be thru Windows file type associations….
without knowing what Windows you are on…I can’t tell you how to modify it…
but a quick Google would do it…
just FYI there are a couple different levels of integration with audition…
Some is actually Project level integration….that’s not going to be possible with anything else…
but for this work…sounds like sound file modification will likely suffice for your needs….
Cheers….
Alex Udell
Editing, Motion Graphics, and Visual FX
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