If you tune each note of any passage to a single fundamental (a drone), if you are successful the result will that you play the passage with 'pure intonation'. As it happens, without the drone, that is, just played through as a melody or whatever it may be, it will sound all wrong though, since what would sound in tune would actually be either 'tempered intonation' (like piano) or something approaching 'Pythagorean intonation' (f.ex if you are playing a melody).
If you are aware of all that and choose to use the drone anyhow - for example as a reference point for some notes (the tonic will at least match!) or for unaccompanied arpeggios.. or just a passage in a ****** key like D flat - that's well and good. I'm guessing most ppl don't choose which kind of intonation they will be using for certain passages however. And the ones that can and do are likely to be sensitive enough not to have any need for a drone to hold them in key anyhow.
Here's my advice when it comes to finding the right notes: practise with your eyes closed! It helps you listen better and also increases your tactile sensitivity. Those are really the only tools you need to play in tune. Closing your eyes sharpens those tools
If you are aware of all that and choose to use the drone anyhow - for example as a reference point for some notes (the tonic will at least match!) or for unaccompanied arpeggios.. or just a passage in a ****** key like D flat - that's well and good. I'm guessing most ppl don't choose which kind of intonation they will be using for certain passages however. And the ones that can and do are likely to be sensitive enough not to have any need for a drone to hold them in key anyhow.
Here's my advice when it comes to finding the right notes: practise with your eyes closed! It helps you listen better and also increases your tactile sensitivity. Those are really the only tools you need to play in tune. Closing your eyes sharpens those tools
