Quartertone bugs

Please see for reference score my entry at


For certain instruments, when using quartertones, accents cause wrong pitches. Especially oboes, with accent >.

Then I found that sometimes using legato slurs, or even the technical expression "legato" itself, caused the violins either to transpose a bit, or grace notes are added.

!!! This latter bug is especially tricky, as it is not to be heard during playback, but only when having exported the audio file.

Please check the file and crossread with the sib score attached in the link above (Why can't I upload the sib file here, please? What kind of files are allowed at all? .mp3 fails as well...)

Listen here, please:




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Idea No. 607