It depends if you wanna use bass samples or synths (or you can always use both for different beats I guess).
I use a one note bass sample most of the time if I need to make an original bassline (though sometimes if there's lots of bass in the sample I'll just make a separate bass channel in the effects rack and use a plugin like Waves RBass and some EQ)
What I do (in the sampler channel) first is change the "Time Stretching" from 'Resample' to 'Auto' so moving the Mul knob will stretch the sample without affecting the pitch (though I usually don't even have to stretch the sample, it's more of a habit). Then under the INS tab in the sampler channel, I turn the ATT down all the way (or almost all the way if the sample's choppy), then the release down most of the way, till the sample only plays while I'm pressing the key, that way notes won't overlap.
A good trick if you're struggling to make basslines that are in tune with the samples melody: Open the main sample in Edison (right click on the waveform in the sampler channel and click Edit), then look at the row of icons and next to the scissors and spanner one there's one that says 'Abc'. Left click on that and near the bottom there should be something that says "Detect pitch regions", so click that. Then if you're lucky all the notes of the sample should come up (though it won't work as well with harmonised samples, chords etc.). So say the first note in your sample is E5 and your bass sample is C5, try tuning the bass sample up 400 cents (or leave it and move it up to E5 in the piano roll) so that you'll have a good starting point for making a bassline that's in tune. Obviously if you've changed the pitch of the sample it'll be harder to work out though! I guess in that case you could still export a single pattern the sample loop with it's pitch changes, then add that to Edison and detect the new pitch...
Also, when you go to the Piano Roll, change the view from the piano keys to the actual notes, so click 'Abc' next to the two piano icons
---------- Post added at 09:06 AM ---------- Previous post was at 08:56 AM ----------
Oh and another thing I forgot to mention. This is a tip someone else gave me when I was struggling with basslines.
If you can't seem to get the pitch sounding spot on, try playing the notes (or just move all the notes in the piano roll by selecting and dragging them all at once) a couple of octaves higher, cos apparently pitch is much easier to hear at higher frequencies... So if your bass is slightly out of tune (by just a few cents) maybe move it up a couple of octaves (turn off any filter/EQ of the high frequencies while doing this obviously) and see if that makes it easier to get it right.
Also, if you just want to use the bassline that may already be in the sample but it doesn't sound that good or sounds a bit muddy or whatever: Just make a separate bass channel, EQ the low frequencies out of the "non bass" effects slot and EQ most of the high/mid frequencies out of the bass one, and just copy the pattern from the main sample channel into the bass one, maybe try a bass plugin (but use it sparingly or it'll just make the mix really muddy)
---------- Post added 01-19-2011 at 03:46 PM ---------- Previous post was 01-10-2011 at 09:06 AM ----------
too much information? haha