For instance, four eighth notes played adjacent to one another are currently treated the same as four eighth notes played separated with eighth rests in between each. It would seem that the four played smushed together are tougher (especially if this example is taken to the extreme when these notes change pitch, and instead of eighth notes, they are sixteenth or thirty-second notes).
However, at least currently, these are still treated differently than four quarter notes being played adjacently, since the quarter notes require a longer total duration of sustained playing. Therefore, both sets of eighth notes are more difficult than the quarter notes. However, if the tempo was very slow (say 10 beats per minute), the quarter notes would logically be more difficult, because they required much more breath support.
Resolving this issue fully will likely take a fair amount of discussion and changing implementations.
For instance, four eighth notes played adjacent to one another are currently treated the same as four eighth notes played separated with eighth rests in between each. It would seem that the four played smushed together are tougher (especially if this example is taken to the extreme when these notes change pitch, and instead of eighth notes, they are sixteenth or thirty-second notes).
However, at least currently, these are still treated differently than four quarter notes being played adjacently, since the quarter notes require a longer total duration of sustained playing. Therefore, both sets of eighth notes are more difficult than the quarter notes. However, if the tempo was very slow (say 10 beats per minute), the quarter notes would logically be more difficult, because they required much more breath support.
Resolving this issue fully will likely take a fair amount of discussion and changing implementations.