ASR 10 Sound Formats

Does the ASR 10 support WAV files, or does it use it's own proprietary sound files?

Also, is the sequencer much more difficult to use on an asr 10 than on an MPC?

Here's the ASR 10 manual str8 from emu/ensoniqs website:

http://www.emu.com/support/files/storage/ASR10_manual.zip

I would advise you to download it, and take a look on how it works.

Proprietary. You can use recycle to send sounds over midi cables.