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-- host-69-146-29-10.static.bresnan.net (2007-05-29 18:36:16)
You use jack, right? Then you have to set which alsa device will be used for capture and playback (the simplest way is to use qjackctl for that) . 

There are several possibilities on e-mu. Let's say e-mu is the only card in your system, so it has index 0.
 Then hw:0,0 is stereo, 16bit only. Do not use it for capture. However, it's probably the best device for playback for now, 

because multichannel playback is currently broken. hw:0,2 is multichannel capture capable of 8 channles at 24 bit resolution. 
Always use that for capture. hw:0,3 is multichannel playback of 16 channels at 16bit. It does not work reliably a need to be reworked (24 bit, proper sync at 44kHz, etc..).

 So most reliable setup for e-mu cards is hw:0,2 for capture and hw:0,0 for playback (you can use them simultaneously).

Now about the routing. There are a lot of ports called "DSP <number>" it he mixer. At first look it's rather confusing. 

Actually, there are two groups od "DSP" ports. One group is for input (DSP 0 to DSP 15, hexadecimal numbering! ) and it's the first bunch 
of "DSP" from left in alsamixer (bottom line). The other group is for playback (DSP 0 to DSP 31, decimal numbering, OMG!!!).

 First 8 inputs (DSP 0 - DSP 7) are used for capture (you will see and hear them in the jack). Other inputs are mapped directly 
onto their output brothers with same number (don't forget, that inputs are hexadecimal, so DSP A is mapped to DSP 10, DSP 12 to DSP 18, etc..). 

Otput works same, so if you use hw:0,0 (2 channels) for playback, then you will hear them on outputs DSP 0 and DSP 1.