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Old 19th June 2011, 04:55 PM   #581
exa065 is offline exa065  Canada
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[QUOTE=Robert F;2611051]
Quote:
Originally Posted by exa065 View Post
I wander how many people are interested to play with exaU2I and DSD? I haven't heard back form Flemming and I have no further details on the player ->ASIO wrapper setup that was used for his experiment. There are two options to enable DSD with exaU2I:

This is exactly what I have been waiting for, I really hope you can make it happen!
Email issues have been sorted out and I have received and compiled Flemming's DSD player prototype. I will be working on it when I come back from vacation.
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Old 20th June 2011, 07:41 PM   #582
theob is offline theob  United States
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Ok Exa065 so I 've got a Buf32s which I'm currently driving with Juli@ I2s. Now if I wanted to use your product and use some of the crossover capability how would I do it? Do I need another buf32s?
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Old 21st June 2011, 01:45 AM   #583
exa065 is offline exa065  Canada
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Ok Exa065 so I 've got a Buf32s which I'm currently driving with Juli@ I2s. Now if I wanted to use your product and use some of the crossover capability how would I do it? Do I need another buf32s?
Well, you have one I2S source and if you add an exaU2I to the mix you will need to switch between I2S sources somehow. You can use one or the other.

Then you need to decide on crossover software. Are you going to use a VST plug-in like Allocator? If yes you need a VST host. I have a demo setup described here.

Are you going to be using 3-way or 4-way speakers? If you have "a Buf32s" than I assume you have a 2 channel DAC. For a 3 way system you need total of 3 Buffalo II DACs.
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Old 21st June 2011, 03:33 AM   #584
exa065 is offline exa065  Canada
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Default Native dsd playback from WinXP PC using the exaU2I

Quote:
Originally Posted by flemming3520 View Post
About 2 weeks ago when I again was looking for dsd support for the exaU2I, I started thinking about the similarities between I2S with 32 bit data length and raw DSD.

I2S has a bit clock of 64*Fs, a Fs word clock and two 32 bit data words for a stereo channel
Raw DSD has a bit clock of 64*Fs, a Fs word clock (not allways used) and a data rate of 64*Fs for each channel

So an quad 44.1kHz I2S connection will have the data rates needed for a raw dsd connection to a if we connect like shown below.

I2S dataclock -> DSD data clock (Data clock)
I2S data channel 1/2 -> DSD data 1 (D1)
I2S data channel 3/4 -> DSD data 2 (D2)
I2S wordclock -> not connected

Note it will only work because exaU2I support 32bit data, two+ I2S data channels , and the ESS9018 dac do not use the wordclock for DSD data.

So I ordered an exaU2I
I got the exaU2I unit this Friday and started playing with the software using the C# Asio wrapper from here Low Latency Audio using ASIO Drivers in .NET - CodeProject as a starting point.

I am now listening to Alison Krauss's Live album in DSD playing back from my WinXP PC

If anybody will like to try, I will be happy to supply the software, but "as is".
It is only a proof of concept and have to be used with extreme care.

I also tested that the ES9018 have support for both DSD64 and DSD128

Flemming
Hi Flemming,

Finally I've managed to get back to my office and to experiment with your proof-of-concept DSD player. Actually it works great! I enjoyed the full glory of the DFF downloads from 2L. Thank you for pioneering this exciting development.

My next step is to research the possibilities for creating a user friendly solution for DSD playback. Any feedback is welcome.

exa065
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Old 21st June 2011, 11:32 AM   #585
theob is offline theob  United States
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I understand I might need another Buf32s but what does "...Well, you have one I2S source and if you add an exaU2I to the mix you will need to switch between I2S sources somehow. You can use one or the other..." mean?
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Old 21st June 2011, 12:13 PM   #586
qusp is offline qusp  Australia
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it means that the sabre 901X series dacs do not have an internal i2s mux, only spdif sources can be switched using only the dac and its mcu. if you have 2 i2s sources connected at once they will just play over each other, as with i2s and spdif. you need an external way of switching between the 2 sources and the output of that switch is connected to the dac. you can use something as simple as a couple of relays, or you can do it by fully software driven means.
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Old 21st June 2011, 02:57 PM   #587
theob is offline theob  United States
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Quote:
Originally Posted by qusp View Post
it means that the sabre 901X series dacs do not have an internal i2s mux, only spdif sources can be switched using only the dac and its mcu. if you have 2 i2s sources connected at once they will just play over each other, as with i2s and spdif. you need an external way of switching between the 2 sources and the output of that switch is connected to the dac. you can use something as simple as a couple of relays, or you can do it by fully software driven means.
Ok yes thank you I do understand what you are saying but what connection or relevance does that have with using the exa21 as an electronic x-over? Don't I need to just come out of the exa21 to 2 different dacs one for the high pass filter one for the low pass filter assuming a 2 way?
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Old 21st June 2011, 03:50 PM   #588
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Quote:
Originally Posted by theob View Post
Ok yes thank you I do understand what you are saying but what connection or relevance does that have with using the exa21 as an electronic x-over? Don't I need to just come out of the exa21 to 2 different dacs one for the high pass filter one for the low pass filter assuming a 2 way?
I think there was an assumption from your post that you wanted to continue using the Juli@, which led to the discussion about source switching. Just ignore that bit and pay attention to the questions about x-over software.
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Old 21st June 2011, 04:02 PM   #589
theob is offline theob  United States
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thanks
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Old 21st June 2011, 04:16 PM   #590
exa065 is offline exa065  Canada
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Quote:
Originally Posted by theob View Post
Ok yes thank you I do understand what you are saying but what connection or relevance does that have with using the exa21 as an electronic x-over? Don't I need to just come out of the exa21 to 2 different dacs one for the high pass filter one for the low pass filter assuming a 2 way?

Here is your minimal configuration:
  1. Multichannel I2S source: Juli@ or exaU2i
  2. Two Buffalo II DACs for a two-way system.
  3. Software crossover to split 2 channel source into four output channels
  4. Player or VST host, or the combination of the two to host the crossover
Do you have any specific questions on any of these items?
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