ftp://ftp.eudora.com/eudora/purevoice/windows/PVConverter.zip

For Linux users, it will quite happily run under Wine.

The binary you need is pvconv.exe.

There is code in BitPim 0.7 that automagically converts all non-midi
files to qcp when you add them as a ringtone. You have to put a copy
of pvconv.exe in the BitPim resources subdirectory.

I did want to redistribute it with BitPim but the license is suitably
vague, and Qualcomm won't just tell me yes or no.

ftp://ftp.eudora.com/eudora/purevoice/windows/PVConvReadme.txt

Roger