My record player sounds pretty good, on the whole (it's a Linn Basik
with Linn arm and cartridge that I got about 17 or 18 years ago).

However, on some records, it can sound a bit glassy. I don't know if
that's the right word. In louder passages - especially towards the end
of a side, I *think* - sustained notes seem to have a brittle edge to
them.

Because nearly all of my vinyl records are second-hand, it's hard to
know whether the records are worn or the player isn't playing them well.

Are there some basic adjustments I should check, or would I be better
taking it to a hi-fi shop and asking them to check it's set it up
properly?

I'm quite happy taking things apart and making mechanical adjustments,
but I haven't done much messing about with record players.

Daniele