[LSR] A tableture for clarinet

[Sebastiano Vigna]

Every day a new nice problem. :)

The above snippete fiddles with PostScript, directly. The result is  
not convertible by convert:

---
ERROR: /invalidfileaccess in --.libfile--
Operand stack:
      (/usr/local/lilypond/usr/share/lilypond/current/fonts/otf// 
emmentaler-11.otf)   Font   (/usr/local/lilypond/usr/share/lilypond/ 
current/fonts/otf//emmentaler-11.otf)   (/usr/local/lilypond/usr/share/ 
lilypond/current/fonts/otf//emmentaler-11.otf)   (/usr/local/lilypond/ 
usr/share/lilypond/current/fonts/otf//emmentaler-11.otf)
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   -- 
nostringval--   2   %stopped_push   --nostringval--   -- 
nostringval--   --nostringval--   false   1   %stopp
[...]
---

Now, of course I can check, besides everything else, that the EPS  
generated by Lilypond is correct. But I think this is a bit too much.  
Also because PostScript is Turing-complete, so it is possible to  
fiddle to the point of tearing down the server.

What do you think?

Ciao,

                                seba