From the DirectStream MKII DAC Production Launch Start-up thread.
Post 168
Mk II Menus (Firmware 2.3.5) compared to Manual Rev A-1
Trigger Delay: Listed in manual (pg 7) but I did not find it in the menus
Found in Mk II Menu but not in the Manual (default is BOLDED)
- Pre Emphasis: Off/On
- Audio Output submenu items
Ground Lift: Grounded/Lifted (how is this different than Input ground lift?)
Shell Lift: Grounded/Lifted
RCA Balanced: Off/On
Ted’s Reply
Not all features in the UI were well tested before the release, Trigger delay is one of them. Among the others are Dual AES (XLR inputs), configuration of polarities for I2S, selectable default display on the UI, bigger font for display…
Preemphasis: CD’s have a preemphasis option (which some early CDs used). But not all rippers kept that information and there’s no standard for I2S or USB transmitting the preemphasis flag and not all players, sources provide it over AES3, S/PDIF or TOSLink. Also, some non-PS Audio I2S devices seem to trigger PS Audio’s I2S preemphasis indicators. A UI setting helps to clear some of this up.
Ground lift is an option on all digital inputs and the analog outputs.
Shell Lift is an optional lift for the Shell of the XLR audio output. That’s separate from lifting the ground signal.
aaronm’s reply
2.3.3 and 2.3.5 are exactly the same. With one thing we had to add for engineering for testing. …
The update is not necessary for the DAC’s with 2.3.3 in the field. There’s zero difference to the code other than the engineering update to the network module for in house testing.
NOTE: Per Ted’s video with Paul Paul and Ted discuss the DirectStream MK2 DAC - YouTube
The Ground Lift option is the Galvanic Isolation.