staff lines blurred on my website

[Gerard McConnell]

Hello,

I've been using Lilypond to draw examples for my

counterpoint tutorial website at:

http://homepage.eircom.net/~gerfmcc/fugue.html

The staff lines are somewhat blurred.   What is the

likely reason for this? (I'm converting the output to

.png with {lilypond --png file.ly} )

(As I state on the site that I'm using Lilypond I'd like to

show the best possible output.)

Thanks,

Gerard