Moon's health was especially an object of concern, as his drumming skills had noticeably deteriorated and his performances for most of the sessions were substandard. He was unable to play in 6/8 time on the track "Music Must Change", so the drums were removed completely from the track, and replaced with the sound of footsteps and a few cymbal crashes. Bassist John Entwistle remarked that Moon "couldn't think of anything to play." On another occasion, Astley recalled, "I was doing a drum track, and he hadn't learned the song. I actually had to stand up and conduct. He said, 'Can you give me a cue when you get to the middle part?' [...] He hadn't done his homework." Entwistle similarly described Moon as "really out of condition", and "disgusted with himself" as a result.