I just got the EMU 0404 and I had the same trouble. I found this pdf file for ya that may help answer the question of switching between 44, 48, 96, 192 etc...
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The Session
The current state of the PatchMix DSP mixer (fader settings, effects routings…everything!)
can be saved as a Session. Whenever you create or modify a mixer setup, all you
have to do is Save it to be able to recall it at a later time.
Before you begin using PatchMix DSP, you need to set it up to be compatible with the
other software applications you may be running. The most important consideration is
your system sample rate. PatchMix DSP and any applications or other digital gear you
are using must be set to the same sample rate. PatchMix DSP can run at 44.1kHz,
48kHz, 88.2kHz, 96kHz, 176.4 kHz or 192kHz sample rates, but the effect processors
are only available at the 44.1kHz or 48kHz rates.
When you start a new PatchMix DSP Session, the first choice you make is to select the
sample rate. Once set, you can only easily switch between 44.1kHz and 48kHz. You
cannot switch between 44/48kHz and 88k/96k/176k/192k. With a change to these
high sample rates, you must start a new session.
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Also you can DL this pdf here:
media.zzounds.com/media/0404_1.81B_EN-5c89896f87d48881136fc2e2155c36f6.pdf
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Good Luck
