Changing existing audio sample rates

Question

would it benefit me at all to convert my existing 44100 audio to say 48000 or above? would it sound better or just make it compatable to record the rest of the project at 48?

Answer 1

No reason to change sample rates unless your project requires delivery of audio at a particular sample rate.
If your original recordings are at 44.1, say, there would be no increase in audio quality by converting them to 48. Depending on the nature of the audio, there's actually a slight chance you'd be decreasing the audio quality (i.e., introducing aliasing artifacts).
If you haven't gotten too far in your recording, and you have lots of tracks to go, sure, you could convert existing audio to 48 and record the rest of your stuff at 48. This will give you slightly better high-end definition, for the most part. But ultimately, if you're going to put this stuff on CD you're going to have to go down to 44.1 anyway.