Yes it is scalable for multi-channel applications. So for a 4-way stereo system you will need 8 of these modules (4 for each L/R channel). Of course assuming your DSP produces 8 channels of DSD
Yeah, I need to see if there is anything outputing 8 channels of dsd via computer...My exa21 is not documented to output dsd but have heard it will....
Since the BBB is in the picture above and we need a source to playback DSD, I hope we can stray a bit off topic .
Continueing here..: I was looking at HQPlayer last night as well, impressive set of conversion options.
Just to keep myself honnest I doublechecked the specc's of the BBB and it Ethernet adapter only supports 10/100Mbps. It's important to remember to deduct a healthy portion off for overhead. Most adapters only achive a mere 60%-80% of actuall application bit rate, worse if other chatty applications are present.
@Acko, you were hinting at the DC offset. What are your thought on that, now that you've spend some time on the board?
Stijn, strangely, I woke with a nagging doubt about my reference to gigabit Ethernet this morning and checked it out and you are correct. Looking back at my earlier posts around this, I couldn't make DSD256 work when my laptop (which has a beta version of 'native' DSD capable Asset UPnP installed) was connected over wifi but it was fine over a wired connection. No, you'll never achieve the full technical bandwidth but Ethernet is a collision detect protocol so in a home scenario with few devices you should be able to achieve good performance, all else being of suitable quality. Still over a wired 100Mb connection I was able to render a native DSD256 album via my BBB/Botic.
Ray
The dc offset is there but nulled out by a servo so the outputs can be directly coupled. No transformers or caps that you usually see in designs like this but having said that servo does not seem be fast enough at times so needs further tuning.
It's been years since i had one, but yes, it does output DSD. For this it required its own software player and an external muting arrangement.
Originally Posted by lemon said:
Thanks Acko for the answering.
I see that it uses the DSD1 & DSD2 for that purpose. In situation that these u.fl used by an allready dac, can we split the signal of these? One pair to dac and the other pair to Direct DSD? Is it practical?
I know these are personal choices, but if there is no getting around a DC offset a HQ traffo is no sin.
You can connect the outputs to suitable trafos to cancel out any residual dc and provide isolation. In fact will be supplied without any output connectors mounted. This dc effect is only during track changes when the levels suddenly change but otherwise when music is already playing there are no problems. There is absolutely no background noise.
Tried HQPlayer 3.10 (licensed version) on my core i7 MacPro running Win7 (dual boot). Transcoded 44.1k pcm right up to DSD512 (the maximum possible with Amanero). Did not break a sweat on the PC and sounded fantastic with this DSD DAC!
Unfortunately, HQPlayer (demo version) on OSX crashes!
Anyway, really happy with the results of the live transcoding.
Prior to this I tried preconverted files using JRiver (to DSD128 max) but did not quite like the results compared to original PCM
HQPlayer sound is more full bodied and closer to the original PCM. Using defaults only but will play around with other settings soon 🙂
HQPlayer sound is more full bodied and closer to the original PCM. Using defaults only but will play around with other settings soon 🙂
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Yes, you can do so to create a dual DAC setup, one for PCM and the other for DSD but you will need to figure out how to select the outputs accordingly
Is J6 an alternate input to the u.fl? One can have a balanced output using 2 boards using the same dsd input but with one input inverted...
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