Add 2nd spock drum to Marching Percussion Tenor instrument and clean up amplitude envelopes
This is in response to this discussion.....
Work has already started on this in that the existing spock samples have been pitch-shifted a minor third upwards, and added to the instrument.
Issues have since emerged with the instrument which are currently being addressed.....
1. The amplitude envelopes do not allow the samples to speak for their full length.
2. Key assignments need to be adjusted which will impact on Instruments.xml
3. The buzz roll samples do not match the pitch of the normal samples.