My apologies if any of these points have already been mentioned.
- If you have bass options try out each one as part of your sound check at the studio. Your favourite bass (or the one you think should work best) is not always the one that WILL work best. And sometimes it's not just a matter of tone, it's a matter of how the bass in question sounds with the parts you're playing. I recently had to re-record some parts because the bass part I'd laid down needed more space between the notes and the fingering was tricky. So I replayed the part with a more modern-sounding bass (one that wasn't as "pillowy") and this helped the bass part sound punchier and better defined.
- Recording yourself direct before the session is a great idea because there's all kinds of stuff you can get away with live (or when you're not under a microscope) that you can't when recording direct in the studio. Is your fingering clean (I've had to change fingering on the spot because I realized that what I'd being playing in live settings wasn't clean enough in the studio)? Are there moments when, let's say, your pinky is accidentally depressing the g string and producing unwanted noise (the action on your bass - or the types of strings you're using - could be an issue)? Do you have a habit of hitting the strings with your plucking finger between notes to "keep the groove" (that kind of thing can add unwanted noise to your track)? Are you sliding excessively across the strings creating unwanted noise?
- If you have bass options try out each one as part of your sound check at the studio. Your favourite bass (or the one you think should work best) is not always the one that WILL work best. And sometimes it's not just a matter of tone, it's a matter of how the bass in question sounds with the parts you're playing. I recently had to re-record some parts because the bass part I'd laid down needed more space between the notes and the fingering was tricky. So I replayed the part with a more modern-sounding bass (one that wasn't as "pillowy") and this helped the bass part sound punchier and better defined.
- Recording yourself direct before the session is a great idea because there's all kinds of stuff you can get away with live (or when you're not under a microscope) that you can't when recording direct in the studio. Is your fingering clean (I've had to change fingering on the spot because I realized that what I'd being playing in live settings wasn't clean enough in the studio)? Are there moments when, let's say, your pinky is accidentally depressing the g string and producing unwanted noise (the action on your bass - or the types of strings you're using - could be an issue)? Do you have a habit of hitting the strings with your plucking finger between notes to "keep the groove" (that kind of thing can add unwanted noise to your track)? Are you sliding excessively across the strings creating unwanted noise?