Processing : Event Operations : Select/Split Notes Command : Selecting a Pitch Range of Notes

Selecting a Pitch Range of Notes
A common use for Select/Split Notes is to select a single note for the entire length of a clip or track. This is especially useful if you want to select a note in a MIDI drum track (such as a hi-hat), and affect it over the selected time range with the Quantize, Groove Quantize, Transpose, or Change Duration command.
To select only the hi-hats in a General MIDI drum track:
1 Do one of the following:
*   
With the Grabber or Selector tool, select the range of MIDI notes that contains the notes.
– or – 
*   
To affect all the MIDI notes on a track, click in the track with the Selector tool, so that it contains a flashing edit cursor.
2 Choose Event > Event Operations > Select/Split Notes.
3 Select the Notes Between option with the note range set to F#1 and F#1 (if the MIDI Note Display setting in the MIDI Preferences page is set to Standard Pitch).
For a General MIDI drum kit, the closed hi-hat is assigned to MIDI note number 42 (F#1 at Standard Pitch). If the hi-hat for your drum kit is assigned to a different note, make sure to specify it.
4 Click Apply.
*
You can also select all notes of a specific pitch on a track using the mini-keyboard. For more information, see Selecting MIDI Notes.