TotalDAC fans:
If you have a D1-Server and are using the ethernet input for streaming your music, it is an easy task to convert it to supporting HQPlayer.
Since the D1-server utilizes a shielded cubox with ethernet input and usb output behind the
rear plate, the OS on the microSD can be simply swapped out for the NAA image that Jussi provides on
the signalyst.com site.
I assume the user is already familiar with using HQPlayer or HQPlayer embedded (i.e. linux).
I run the embedded version on ubuntu (bionic beaver).
Steps:
1. burn NAA image (current one is naa-355-cubox-i.7z) to a microSD card
2. turn off power to d1-server
3. remove (label and save) existing microSD card by pushing in, then popping out the microSD
4. insert new microSD with NAA image
5. turn d1-server power back on
6. in HQPlayer settings, find new NAA target on network
7. done. continue to use HQPlayer as previously
I was previously running an ultraRendu as my streaming target device and compared DLNA/MPD/LMS and NAA modes
and the NAA mode was consistently better. In NAA mode (and not the others), the renderer functionality is moved off of the target device
(HQPlayer does the rendering at the PC running HQPlayer) and a proprietary stream is sent to the NAA device, which now has much
less processing to do (and presumably can provide a cleaner/better usb output signal). While many use HQPlayer to upsample to higher PCM rates or to DSD, I do not do this as, in my limited trials, I found the TotalDAC to sound best with no other signal processing (warning: your mileage may vary).
Therefore, I am doing zero signal processing with HQPlayer, simply splitting the functionality so that the rendering happens in the PC and not the target steaming device.
Some initial (and not exactly adequate, sorry--my left channel Ayon monoblock is in the shop and replaced by 1/2 of an old ST-70) observations:
1. hqplayer==>50' cat6==>ultraRendu(NAA mode)==>usb ==> D1-server/reclocker==> aes/ebu ==>D1-Direct
2. hqplayer==>50' cat6==>ultraRendu(other modes)==>usb==>D1-server/reclocker==>aes/ebu==>D1-Direct
3. hqplayer==>50' cat6==>d1-server/cubox==>usb==>D1-server/reclocker==>aes/ebu==>D1-Direct
1 >> 2
1 >> 3
Given the latter, why do NAA at all?
Because, as Vincent recommends and is echoed by users and reviewers, the Gigafilter is needed to clean up the usb output of the cubox and greatly improves the sound......and I don't have one available right now so case 3 has no filtering of the usb signal.
The ultraRendu (with LPS-1.2 power supply) clearly creates a cleaner/better usb signal than the cubox alone for the reclocker input in the d1-server.
Once I get my monoblock back from the shop, I'll do more critical comparisons.
If anyone out there is using the D1-server and has the gigafilter, I'd be interested in knowing if the hqplayer/NAA provides further improvement in your system. HQPlayer can be downloaded in test mode where it will play for 30 minutes before needed to be restarted, so it is well suited for trial testing.