Thank you for the clarification. Yes, when I try with WASAPI I have the same problems but I tried less times with WASAPI than with ASIO.
To resume, it seems that I have three kind of situations:
- Everything runs smoothly, I even have a gapless playback. I was very happy when I listened for the first time to a DJ mix in its total continuity with enhanced sound quality after three months of playback with this suspicious “KEF Stream” app. Even downsampled DSD playback goes smoothly too, amazing sound quality and responsiveness. It’s just perfect.
- Everything runs smoothly as descrided above in (1) but the songs do not follow on from one another. When a song is finished, everything stops. I have to push on the stop button and click play on the next song everytime the previous song is finished.
- I try to launch a song but nothing works, the play/pause button freeze. When I push the stop button and retry to play the song or try another song, nothing works. But I can see that the communication between Audirvana and the KEF LSX exists because when I adjust the volume in Audirvana, the light on the KEF LSX tells me it receives the information. Similarly, when I adjust the volume with the KEF LSX remote, the volume is adjusted in Audirvana.
I really cannot tell why one or the other situation occurs and tried with another computer with exactly the same pattern. I have the feeling that it happens randomly and in no particular order, with the same proportions: one time (1), the other time (3), the other time (2), etc. When I shut everything off and restart everything, it doesn’t solve the problem.