Hi CJ, welcome to the forum.
Well, Sibelius won't allow you to add those sounds to the SnareLine (AutoRL) mapping (can't mix sounds from multiple patches). However, there are other methods to get cowbell sounds onto the SnareLine staff.
1) Use an Instrument Change to Cowbell. Limitation: would not be able to have simultaneous SnareLine/cowbell sounds and/or notation.
2) Use a second staff with just cowbell (for the playback), then write the cowbell notes into the SnareLine staff. Would probably need to uncheck the Play On Pass check boxes in the Inspector so they don't playback there. Can then hide this staff for printing.
There may be other tweaks, but those two come to mind immediately.
Hugh
Well, Sibelius won't allow you to add those sounds to the SnareLine (AutoRL) mapping (can't mix sounds from multiple patches). However, there are other methods to get cowbell sounds onto the SnareLine staff.
1) Use an Instrument Change to Cowbell. Limitation: would not be able to have simultaneous SnareLine/cowbell sounds and/or notation.
2) Use a second staff with just cowbell (for the playback), then write the cowbell notes into the SnareLine staff. Would probably need to uncheck the Play On Pass check boxes in the Inspector so they don't playback there. Can then hide this staff for printing.
There may be other tweaks, but those two come to mind immediately.
Hugh