USB Output Board

[Fred-ql]

Do you have a deadline for your USB electronic card?


AP Wrote:
-------------------------------------------------------
> Hi Fred-ql,
> Thanks for poking us here! The USB output board
> has been on a back burner for a while and we only
> had a few modules with people in field for testing
> and for us to collect some feedback. Incidentally,
> with getting parts and boards manufactured for the
> Power Supply unit (VanityPSU) the USB module is in
> the manufacturing process too. I know it has been
> quite some time and thank you for your patience.
> It should be ready for sale soon!
> Best Regards,
> Pavel

[misig1]

Thank you Pavel! I'll try this method (though going analog to digital speakers is a kind of an weird thing).

[AP]

Hi Fred-ql,
Now with the boards in production I would not hesitate to give an ETA for the boards to be on the shelf with our distributors. We should have the boards back in 2-3 weeks and if everything goes well (it rarely does though) we might be able to ship before we break for Christmas holidays. Alternatively, it should happen early January shortly after we wake up from the New Year celebrations.
I will keep this thread updated as soon as I have some news.
Thank you for your patience.

Best Regards,
Pavel


Fred-ql Wrote:
-------------------------------------------------------
> Do you have a deadline for your USB electronic
> card?
>
>
> AP Wrote:
> -------------------------------------------------------
> > Hi Fred-ql,
> > Thanks for poking us here! The USB output board
> > has been on a back burner for a while and we
> only
> > had a few modules with people in field for
> testing
> > and for us to collect some feedback.
> Incidentally,
> > with getting parts and boards manufactured for
> the
> > Power Supply unit (VanityPSU) the USB module is
> in
> > the manufacturing process too. I know it has
> been
> > quite some time and thank you for your
> patience.
> > It should be ready for sale soon!
> > Best Regards,
> > Pavel

[AP]

Hi misig1,
I appreciate it may feel weird, but I bet the OKTO would do a better job than the DAC built into the speakers. Although the speakers are "digital", the class-D amps still amplifies analogue signal, which needs to be converted from digital to analogue form by a built-in DAC. It would actually make a nice nice listening test exercise, if it sounds better with digital feed from the VanityPRO or analogue one from OKTO. Please feel free to share your experience here.
Best Regards,
Pavel

misig1 Wrote:
-------------------------------------------------------
> Thank you Pavel! I'll try this method (though
> going analog to digital speakers is a kind of an
> weird thing).

[seevic]

Hi Pavel, it's almost March now, any updates pls?

[AP]

Hi seevic,
I know it has been a while and I appreciate everyone's patience. Please see the update on our [url=https://www.facebook.com/photo.php?fbid=385944667722360&set=a.102613926055437&type=3&ref=embed_post]Facebook[/url]. Long story short, the USB modules should be with JVB next week in full distribution.
Best Regards,
Pavel

[bobkatz]

I really like the idea but I'm AES/EBU. I would want to have my cake and eat it, too! Have both USB and AES/EBU options, otherwise I'd stick with AES/EBU.

I guess on the HDMI side, the HDMI is the master clock and the AES/EBU is a derived de-jittered output that's "synced" with the HDMI source.

It would be nice to stay bit-perfect:

With the USB, can you use asynchronous mode where the DAC receives sample rate information from the USB, the DAC has the master clock, and sends handshake signals to the USB source?

OR, In my monitor controller I can accept a wordclock so if the USB board can put out a derived and de-jittered wordclock and I can sync to the wordclock from the Vanity and get audio from the USB.

[Fred-ql]

Hello,

I'm likely going to acquire a USB audio interface (Metric Halo LIO-8 mkIV) which has 8 AES inputs.

I'd like to know the advantages/disadvantages of the USB version versus AES (used in DoP)? (Considering that in any case, the signal will be handled by a PC.)
And, does an AES 192 kHz audio interface accept DoP?

Thanks in advance

[AP]

Hi Bob,
I am afraid the USB Audio is not as clever as one would expect. The USB audio host has no way to be told the sampling rate from the USB device side. This is why one has to manually set the sampling rate manually each time it changes. The resampling stage on the USB module has been added just for the convenience of having the sampling rate fixed on the PC side. For bit accurate data transfer the ASRC must be of course disabled.
Regards,
Pavel

bobkatz Wrote:
-----------------------------------------------
> With the USB, can you use asynchronous mode where
> the DAC receives sample rate information from the
> USB, the DAC has the master clock, and sends
> handshake signals to the USB source?
>
> OR, In my monitor controller I can accept a
> wordclock so if the USB board can put out a
> derived and de-jittered wordclock and I can sync
> to the wordclock from the Vanity and get audio
> from the USB.

[AP]

Hi Fred-ql,
The DoP support is probably equal, because you can get DoP over both interfaces. With the USB module you don't need any additional hardware and audio can go from the VanityPRO straight into a PC via USB. The is also the optional ASRC stage which allows you to fix the sampling rate with the caveat that the signal path is no longer bit accurate.

With some AES interfaces (and even USB ones) it is sometimes tricky, because declared support of 192kHz sampling rate does not automatically imply support of 176.4kHz which is required for DoP. So, please check the full compatibility in advance.
Regards,
Pavel


Fred-ql Wrote:
-------------------------------------------------------
> Hello,
>
> I'm likely going to acquire a USB audio interface
> (Metric Halo LIO-8 mkIV) which has 8 AES inputs.
>
> I'd like to know the advantages/disadvantages of
> the USB version versus AES (used in DoP)?
> (Considering that in any case, the signal will be
> handled by a PC.)
> And, does an AES 192 kHz audio interface accept
> DoP?
>
> Thanks in advance