% the only difference in the PMX sources for example 1 and example 2 is that
% nsystems=1 in example 1    , whereas
% nsystems=2 in example 2                     
%                                                 Tue 2005 Mar 8 /20:53 /ccn
1  1
3  8  3 8
0  2
1  1   20  .0

b
./
\\let\tblsav\tbl\
%1 without precautions:
[u e8- D"1"-3 ze- Ct e++ zd zb b+ ze- zd ] Rd |

%2 getting a - slope on the beam -> bad ending:
Cb [u+0-7 e8- D"2"-3 ze- Ct e++ zd zb b+ ze- zd ] Rd |

%3 trying low beam, note heads are messed up:
Cb [l+10 e83 D"3 - note heads"-5
             D"are off!"-9+3
ze- Ct e++ zd zb b+ ze- zd ] Rd |

%4 using brute force in Musixtex:
Cb [u-2-6 e8- D"4 - That's OK"-3 ze- Ct e++ zd zb
\def\tbl#1{\let\tbl\tblsav\roff{\tbl{#1}}}\
b+ ze- zd ] RD |

%5 making the beam higher ends it OK if you also shuffle order (Don):
Cb [u+4-7 e82 D"5 - Don's try"-3 ze+ Ct b+ zd ze d ze zb+ ] |
/