I have the PWD II (connected using USB). Should I select ASIO or WASAPI in JRiver? And what should the buffer size be?
Go to Tools> options> select audio under audio device select the first box you find in there you find Ps audio perfectwave USB driver ASIO select that and you should be able to make your changes. I think you have to have the USB driver installed which can be found under the knowledge base. Buffer size would be your own preference more responsive or more skip resistance.
I would suggest asio if available, but as with everything audio try all available options to see what works best in your system.
J.P.
@lmf22 What J.P. said
It always seems like a cop-out whenever I see, hear and even say it, but the truth is that every system is different and nothing works perfectly for every system.
J.P.
I will give both a good evaluation/comparison when I have the time. The thing is that with casual listening ASIO and WASAPI sounds very similar. It drives me crazy trying to figure out the differences 
I guess that is a good thing?
I’m not a good audiophile… When I am comparing two items and can hear a difference (often not true) I first try to decide if I prefer one or they are just different. If I decide that I don’t have a clear preference then I just use whichever one and don’t worry about it any more. Most of the time I just enjoy the music and occasionally marvel at what my modest little system can do.
J.P.
to me this relates a bit to Paul’s recent post about engagement - sometimes the audiophile brain asks itself, or is asked, to pick apart details to give a verdict on sound. As we’ve seen with some of the FW, it is often the case that we have to get a bit more of a holistic impression, and that takes time, and is harder to A/B. (and takes more beverages)
wingsounds13 said: Most of the time I just enjoy the music and occasionally marvel at what my modest little system can do.=D>
...and why not? B-)