As primarily a bass player and song writer I feel your pain. I got into doing home demo's because I was never happy with my recorded bass tone even in three different pro and semi-pro studio's! I liked my live tone but I never had an engineer that seemed to care about working on the bass tone.
I am currenty using a Yamaha MTX4 4-tracker cassette and have to deal with the bouncing issue also. Finally after four years of frustration I have found success with using a SansAmp Bass Driver and an ART TubePac. The SansAmp alone was harsh to my ears.
I would recomend using some kind of gain boost and/or EQ boost in the upper mid range during your mixing before combining the bass with the drums into a bounced track.
There are some mixing articles at Musicians Friend website in the Tech Archives and other sites that describe "Sound Sculpting" wich involves learning to leave sonic space or not clutter up frequency zones by not having all intruments occupying the full frequency spectrum. A simplified example would be to completely cut all low frequecies out of your recorded guitar signals. The guitar sound alone will not sound as full as you are used to hearing them but the bass has room to shine in the lower frequencies now... after the bass and rums are added to the guitar sound you won't miss the low frequencies from the guitar and the instruments have room to be distinct from one another.
Using this for your bass solo will be more complicated as your bass solo's typically are not in that lower range reserved for the bass and drums. There are many different techniques to achieve your goal. Read everything you can on mixing (Web sites, TapeOp, magazines...) Bassplayer has done columns and articles oon this and interviews with bass players who also solo alot on top of the "bassic" bass track nd how they get it to work on tape in the mix.
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