Walter Becker and Donald Fagen on the fourth full length studio album from Steely Dan. This was the first album after the departure of Skunk Baxter and Jim Hodder and the shift into studio albums with session musicians. (One of the session musicians here is Michael MacDonald providing backing vocals.)
Apparently Becker and Fagen were unhappy with the sound for some technical reasons but it sounds great to me.
My copy is a 1980 reissue by MCA after MCA bought ABC records – via Vinyl Destination in Lowell MA. Though the cover is pretty beat up the vinyl’s actually in really good shape.