Chords, notes and rests can generally be notated to show a duration of 1, 1/2, 1/4 etc. beats but how do I do that for ghost notes - i.e. those with an 'x' as a head. I can find examples of a quarter note and less that use flags on the step but nothing greater than a quarter.
For example, in 4/4 I can fill a measure with two half notes...
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o| o|
but this doesn't work
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x| x|
It looks like, and is, two quarters. I would have to put a quarter rest between and after the two notes but that's not really what I mean.