Q: I recorded some acoustic tracks on track 1 then a second guitar part on track two but I am getting alot of hiss while playing back , how do I correct this?
A: I used to get hiss when I first started using it too. I think it has to do with how high your levels are. I try to keep my tracks exactly or under the lines at around 8 on the faders when im recording to tape (also make sure the "tape" knob is turned to mix when you want to record to it). Any tracks that have nothing on them should be turned off before recording and the levels should be at 0. This is how I do it. Also make sure your using the tape type thats reccomended by tascam for the 488. You can find that on this page about 488's i think.
Q: the input assign (top of the board) should it be on mix or grp 1 , 2 and so on?
A: When I record, I switch the input assign to mix. Im not totally sure what happens when you switch to grp1, grp2, etc.
Q: The assign buttons (above level adjusters) could someone explain those?
A: I think the assign buttons have to do with being able to adjust levels seperately by group. Say you assign track 1 to group 1/2. Now if you adjust the 1/L - 2/R main level fader, your controlling the tracks that are assigned to grp 1/2. Now say you assigned track 2 to group 3/4, now you can adjust the 3/4 main level for that group. That may not be it...It may have some other use. But thats what I believe....
Q: When I am recording does the tape knob have to be on 0 or does it go on mix/cue?
A: When your recording you want the knob on mix. When your done recording and you like what you hear on that track, turn it to cue so you wont record anything over it (only when your finished with that track). Now if your ready to record more tracks and you want to hear what you've recorded on say, track 1 without recording over it, turn the cue level knob up until its loud enough for you. You might even have to press the cue button under the "Monitor" section...
I learned the same way man...I didnt have a manual either. But the learning curve on this thing is excellent. Its not hard to use at all. I learn a lot by trial and error. I hope this helped out a little. By me not having the manual, I only know what I've learned on the way. These buttons and knobs may have much more use, but I think this will help you
Good Luck!!