Apollo 15 has just gone behind the Moon near the end of their second orbit. While out of contact with Earth, the only planned item is the Descent Orbit Insertion (DOI) burn. This audio is from that period.
083:15:41 Scott: Hello, Houston, Apollo 15. The Falcon is on its perch.
[Which is another way of saying that they believe they are in the correct orbit for the LM, Falcon, to fly off and do its stuff tomorrow.]
083:15:46 Henize: Good to hear you coming around that corner. How do things look?
083:15:53 Scott: Okay. Burn status report. Burn was on time. Burn time was about 24.0 - about half a second shorter than predicted. There was no trim; residuals were plus .6 [fps], plus .0, minus .1; Delta-Vc, minus 4.4, fuel 29 - 29.25 [percent of full]; and the oxidizer 29.55; unbalance, 100 increase.
083:16:34 Henize: Thank you, Dave. We copy all that.