I really like Welcome to the machine, but i also agree that Mr.Gilmour's voice sounds a little strange.
But what about Mr.Waters singing it on his "In The Flesh" album?
I just love it!

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"And you run and you run to catch up with the sun, but it's sinking
And racing around to come up behind you again
The sun is the same in the relative way, but you're older
And shorter of breath and one day closer to death"