Simon Albrecht<address@hidden> writes:
>Hello,
>
>the bare durations that can now be used to write notes with
>unspecified pitch don’t work as music function arguments:
>
>\version "2.19.32"
>\new DrumStaff \with {
> \override StaffSymbol.line-count = 1
>} \new DrumVoice {
> 4 \slashedGrace 16 4
>}
>\relative {
> r4 r8 c'' \appoggiatura 4 b2
>}
>
>– each yielding ‘error: wrong type for argument 1. Expecting music,
>found 16’ or similar.
>
>David, is that intentional?
Quite so. From lilypond-changes.info:
• Isolated durations in music sequences now stand for unpitched
notes. This may be useful for specifying rhythms to music or
scheme functions.
"Isolated durations in music sequences". You can place { } to make a
sequence. Telling different types of music function arguments apart is
tricky enough as it stands.