Logic X? Cool, I have an old Logic 9 system though sadly get less time to "play" around on it these days...haven't ever had a go on Logic X, one day hopefully I will get my teeth into a future version if not X.
I'm sure others are more qualified than me, but could be down to
Choice of mic
Recording vocals near to hard reflective surfaces
Once it's on the recording however, it can usually tamed with a de-esser plugin, either on the main vocal track or just on the reverb send...the downside is sometimes this can dull the rest of the vocal track even if it improves the sibilance.
I mean it's no biggie, I could never produce such a cool arrangement I truly enjoyed it.
Thanks so much and sorry it took so long to respond! I will definitely try to work on that for my next recordings. Logic X is incredible and I can only imagine that future versions will be even more powerful. Right now this program does more than I need to create tracks - so much so that I probably only know 5% of what this program can actually do.
Thanks all for the kind comments. Niko, that Heroes and Villains cover took me wayyyyy the hell back. Not my best moment of recording at all haha, but maybe I'll do a far more chill version of it one of these days.