(How does that compare with MP2 for music at higher/est bitrates?)
...but I was disappointed to realize what a closed standard DVD-Audio is.
Quote(How does that compare with MP2 for music at higher/est bitrates?)I don't know. If you are not going to use MP2, does it matter?
As a very general rule, at higher bitrates all lossy compression tends to be transparent.
Given that you're going to be putting audio on the disc with no video, just go for the highest bitrate you can (448 kbps, if Wikipedia is correct). You'll have a hard time noticing any difference at such a high rate, regardless of the encoder you're using.
I'd seen multiple sources saying that AC-3 was good enough for movies where you're not paying full attention to the sound but for music it fared poorly. I wasn't sure if this was even for the maximum bitrate on stereo signals or just the standard rates used for video divided by 6 channels.