first, thanks for all the info. sincerely. now, what can i do to give me some more juice? right now i can run about 8 tracks consisting of small 4 measure loops with no effects before the CPU reaches about 60%. This is just not enough. I've got a decent spec computer. would adding RAM help? i've got 384mb installed right now.
You are talking about a TiBook 550, right?
I just bought a iBoot 600 DVD (with 100 MHz bus), and checked how much I can get there: I loaded a song with running 13 track (16 & 24 bit, most stereo), 6 insert fx and 2 bus fx. This pulled 64% cpu. I really wonder why you get so few tracks, since the Tibook 550 is stronger than my iBook.
Also I agree with katerkarlo: the sheer existance of track plus the fx pull the most cpu. I still think that a standard (even not fast) internal TiBook drive should give enough tracks.
Do you use 24 or 16 bit tracks? 16 should use less power I guess, but havn't tried yet.