Logic Pro 9 User Manual - Help Library - Apple

Velocity
Use to set a velocity offset that is added to, or subtracted from, the velocity of the incoming
note. Drag the number vertically to create a velocity offset. You can also click the specific
point on the beam.
The Initialize > Output Velocities command resets all velocity offsets to 0 (no offset).
Channel
Use to set the MIDI channel of individual notes. This allows you to play individual sounds
from different drum sets in the same sound generator.
You will normally use the Base setting. This means that the notes are sent on the channel
set in the mapped instrument’s Parameter box. If you choose All in the Parameter box,
the channel information of the incoming notes is used. This is useful if you want to place
the mapped instrument after a multi-instrument or standard instrument in the signal
path.
To set all selected notes to Base, choose Initialize > Output Channels.
Cabling Mapped Instruments
You can send individual notes from a mapped instrument object to (up to) 16 different
output cables, allowing you to play sounds from different sound sources. If you select a
cable that doesn’t exist, the note will not be sent out.
The Initialize > Output Cables command resets all cables to #1 (the top outlet of the
Mapped Instrument).
Notation Parameters
The last three columns define the notation parameters of individual notes.
• Head: This pop-up menu allows you to change the note head.
• Rel. Pos.: This field is used to alter the relative position of the note on the staff. This
does not alter the pitch, only the vertical positioning of the note head on a staff in the
Score Editor. Drag vertically to alter the note position.
• Group: As the mapped instrument object is typically used for percussion instruments,
click-holding the Group field opens a menu of grouped drum families: Kick, Snare, and
so on. MIDI sound modules can have drum sounds mapped across 127 possible notes,
which would result in an interesting staff (to say the least). Assign several related
percussion sounds (tom drums, for example) to the Toms group to place all related
sounds on a single staff line. As with the relative position, the pitch of grouped notes
is not affected by grouping them on a single line.
Choosing Initialize > Score Parameters neutralizes the settings of the Head, Rel. Pos., and
Group parameters.
Chapter 37 Environment Objects Reference
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