Recently upgraded from a U1 Mini to a U2 Mini, and I thought I would try the DSD 256 upsampling that the U2 Mini offers. I went into the app and set every single DSD and PCM input rate to DSD 256 output. I happened to be listening to a 192kHz hi-res PCM download at the time and when I hit play all I got was TONS of static. I hit pause immediately but the static continued so I hit mute on my amp. I then tried DSD 128 and got the same result. However with 44.1kHz Redbook CD material it upsampled to DSD 256 just fine.
Anybody know why the higher sample rate PCM wouldn’t upsample to DSD 256? My DAC is a Bryston BDA-3 and I’m connected to the U2 Mini via USB. I did a bunch of switching on the fly between PCM 44.1kHz and DSD 256 and I really couldn’t tell any difference, so I guess for my particular DAC upsampling is not beneficial. Still curious why I had a problem with the 192kHz material however.
By the way, if anyone with a U1 Mini is considering upgrading to the U2 Mini, I can recommend it as I found the U2 Mini to offer a definite sonic improvement over the U1 Mini (at least with my DAC - your mileage may vary).