If you can output the audio from the receiver to your PC through a sound card to get the audio onto your PC as a wav file, you are in good shape. There are many programs that you can use to record music to your PC.
One you have it there, as a stereo WAV file, you would need either DiscWelder Bronze ($99) or WaveLab 5 ($400 or so) to turn these into a DVD-A.
If you want to "clean" the wav files up (i.e. remove pops and ticks, NR, etc), you would need a program that can modify the original wav files and do this. I use Sound Forge or Adobe Audiotion (formerly Cool Edit Pro) for this.
If you want to record discrete QUAD material, you would need a multichannel sound card and software that will record 4, 5, or 6 channels at the same time in sync. For this I use Vegas 5.0, a program from the same company that makes Sound Forge, which is now SONY! (Formerly Sonic Foundry)