Sox - creating a special 24 Bit format

[TomF]

Hi,

has anyone an idea, how to create such a raw-file with sox:

24 Bit Raw-File which uses the upper 3 bytes of 32-bit signed integer...?

I tried things like this (Win), also 32...:
sox.exe music.wav -e signed -b 24 -t .raw output_88200_24.raw rate 88200

Thanks
Regards
Thomas