Repeat tremolo question

[Menu Jacques]

Hello folks,

The LPNR gives as example:
 
\relative c'' {
       \repeat tremolo 8 { c16 d }
       \repeat tremolo 6 { c16 d }
       \repeat tremolo 2 { c16 d }
}

I found by experimenting with 2.19.55 that chords can be used in such tremolos.

The doc doesn’t explicitly exclude unequal durations, such as:

       \repeat tremolo 8 { c16 d8 }

Is that meaningful from a musical point of view? Should the doc mention that 
case, either positively or negatively?

Thanks for your help!

JM