Redding , who had formed his own band in mid-1968 , Fat Mattress , found it increasingly difficult to fulfill his commitments with the Experience .
Hendrix played many of the bass parts on Electric Ladyland .
Redding , who had formed his own band in mid-1968 , Fat Mattress , found it increasingly difficult to fulfill his commitments with the Experience , so Hendrix played many of the bass parts on Electric Ladyland .