arranger [1, 3, 6, 8-9], sound [1, 3, 5-6, 8-9]
harmonica [2, 10]
mastering
guitar [1, 3, 8-9]
assistant
art direction, design, illustration
guitar [6]
guitar [12]
photography
executive
assistant
soprano saxophone [4]
mix [1, 3, 6, 8-9]
recording, arranger [2, 4-5, 7, 10-12], mix [2, 4-5, 7, 10-12], piano [1], sound [2, 4-5, 7, 10-12]
audio director, producer
guitar [2, 4-5, 7, 10]
acoustic bass guitar [1], bass [3, 6, 8-9]
drums (drum set) [2, 4-5, 7, 10]
audio director, producer
task
cello [11], viola [11]