Because this thread is many pages, I'll just recap some things I posted earlier. Keep in mind I am only going by my personal experience as a session player (which used to be a big part of my income many years ago). Everybody's experience will vary (as one poster earlier said he worked in a small studio where the guy did ask for a P-bass)
- Ive never had any producer, engineer, or client (or any combination of) tell me to use a P-bass. They will ask to make things darker, lighter, stringy, less stringy, make it purple, etc...When they are looking for a certain thing, they will usually cite an example. If they say "I'm looking for a tone like 'Promises, Promises' by Naked Eyes, a P-bass won't do that.
- You should be prepared with many basses . A P-bass tone is a "must have" on the pallette imo. But there are many tones on the pallette you should have at any given time. This is why I like to choose swiss army basses (basses with multiple pickups and configs). When I need a P-bass tone, I usually use my G&L ASAT for it, mid pickup soloed in Series mode. This bass can also get many other tones. Its the reason why there are switches and pickup selectors on it. If I was a lefty, I would consider that
- I find that string types are probably the biggest difference more than anything when achieving variances. I only use roundwounds live. However, In the studio, I have basses with rounds, flatwounds, and tapewounds
- Delivery consistency from your fingers/slap/pick/whatever is the biggest factor. Each and every note has to be perfect and even as posible. One of the reasons why VSTis have replaced actual players. The more consistent you are, the easier it is for an engineer to dial you in
- You will get asked to use a pick sometimes (this happened a lot in the 80s and 90s...less and less as time went on)
- "House bass" is kind of a misnomer. Most studios Ive been to don't have them. If they do, its because its the owners or engineers that just happens to be there. Of these, they were usually Stingrays. Ive always used my own basses anyway
- P-basses are wonderful instruments. I don't hate them. They have a certain mojo and - with some players - they just look cool on them. But the science behind them is simple. With a typical Stingray bass, there are many factors affecting its signature tone: a Parallel wired pickup n that 'Ray sweetspot and the proprietary nature of the MM preamp of which few third-party replacements can duplicate....A P-bass is much simpler: its a series wired pickup in that P-sweetspot -- Thats it ---Theres no magic unicorn poop involved in it. Many basses will do that. P-bass cultists always debate the simplicity of the P-bass as part of its magic -- I agree with that 100% - but by virtue of that simplicity, it makes it easy to duplicate
- Session legends in the 60s didnt have near as many bass choices as we do today
- TB is the only place I actually ever hear of this "P-bass or else" thing
EDIT: I am now in RN School, if that is any indication how much music for a living has changed for me. Most studio basses these days are programmed. Im fortunate to still get a few calls.