I found some interesting information on the Internet, regarding the white noise with a different sound card called VXpocket. I'm quoting it below. It corroborates Devialet's theory of interferance from an extraneous Windows process. It also does not contradict our own observations around the increased likelihood of the white noise with the HD formats (more RAM used by DevialetAIR, as a result?)
"During playback, I sometimes get white noise all over sudden - what happens?
Several clients have reported this issue on the following laptops:
ASUS L5GXP30-C PRO
Dell Inspiron 5100/8200/4150
HP ZD7280
It seems that another device uses the memory addresses assigned to the VXpocket by Windows, sending non-audio data to the card.
Possible workaround
On the Dell Inspiron models 8200 and 4150, change the I/O resources of the VXpocket in the Device Manager selecting an address above D800.
For the other above mentioned laptops, we haven't found any workaround so far."
"During playback, I sometimes get white noise all over sudden - what happens?
Several clients have reported this issue on the following laptops:
ASUS L5GXP30-C PRO
Dell Inspiron 5100/8200/4150
HP ZD7280
It seems that another device uses the memory addresses assigned to the VXpocket by Windows, sending non-audio data to the card.
Possible workaround
On the Dell Inspiron models 8200 and 4150, change the I/O resources of the VXpocket in the Device Manager selecting an address above D800.
For the other above mentioned laptops, we haven't found any workaround so far."
JRiver MC20 --> Devialet 250 Expert Pro --> KEF Blades II
