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.

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.
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.