IWBNI it were possible to specify a tremolo or trill playback effect for an articulation. As it is now, such effects may be obtained by creating an appropriate shape for an expression that has a playback type of Restrike Keys.

This could be implemented by adding an item called Tremolo/Trill to the existing list of Playback Effects on the Articulation Designer dialog box. When this item is selected, the following controls could be displayed:

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Speed: Restrike Every _____ EDUs

Second Pitch:
( ) Use pitch of next note
     [ ] Do not play next note
( ) Use pitch related to first note
     ( ) Up ( ) Down
     Interval: |list box of intervals like the chromatic intervals on the Transposition dialog box|

[ ] Strike second pitch first
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With these controls, the following types of playback could be achieved:

• A trill that starts at the pitch of the note to which the articulation is attached and alternates between this pitch and the pitch that is one half step higher and each pitch is sounded for a duration of one 32nd note. To accomplish this, one could select Restrike Every 128 EDUs, Use pitch related to first note, Up Minor Second. If the trill is to start on the second pitch which in this case is the higher pitch, one would select Strike second pitch first.

 
• A tremolo that is a roll or bowed tremolo that consists of a rapid repetition of the pitch of the note to which the articulation is attached. To accomplish this, one could select Restrike Every 128 EDUs, Use pitch related to first note, Perfect Unison.

 
• A measured tremolo consisting of four eighth notes on the pitches A, E, A, E that is indicated by the shorthand notation of two beamed half notes on the pitches A and E. To accomplish this, one could select Restrike Every 512 EDUs, Use pitch of next note (which in this case is E), Do not play next note. The last option is selected to suppress the playback of the half-note E that is indicated in the score.