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Old 19th July 2011, 09:06 PM   #641
exa065 is offline exa065  Canada
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Quote:
Originally Posted by Omholt View Post
When I'm switching from one samplerat/bitrate to another (without pressing stop) in J.River I get an error message. I don't have this problem with other Asio sources. Not a big issue since it's solved by pressing stop and then play, but still something I would like to see fixed.
I will investigate the issue. However your best choice is to use the ASIO driver with J River. The Windows option wising Virtual Audio Cable is available as a backup for players that have no ASIO support - for example Windows Media Player and Windows Media Center.

The disadvantage of using VAC is that you and up with re-sampling unless you re-configure manually VAC every time you use a source with a different sampling rate.
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Old 19th July 2011, 10:30 PM   #642
exa065 is offline exa065  Canada
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Quote:
Originally Posted by Omholt View Post
I'm almost interesting in hearing more about the cause of hiccups with the standard firmware in Buffalo II. If it's related to high jitter level or not. I haven't bought the new firmware yet and is hesitant because TPA is saying it will increase the tolerance for phase noise/jitter.
You are raising the important question for compatibility between Buffalo II and third party I2S devices. Here is a brief summary of previous posts to this thread regarding this issue:

Supra, Post 533:
I've just imported the first exaU2I USB-I2s device into Australia. Very nice unit and great backup from exadevices.
I'm using it with a Twisted Pear Sabre 2 dac, and using the I2S connection of course.
However I cant get a constant lock on to the dac with any freq over 96K. Works fine at 44, 48, 96 but drops out every 2 secs with 176,192.
I've determined it's not the exadevice, as the same thing happens when using an Evo and Teradak I2S connection.
Even when there is no track selected the "Lock" led on dac flashes every 2 secs when connected via I2S.
It's fine with spdif at all freqs, works very well.

Bunpei Post 541:
TPA might have changed ES9018 register setting for DPLL bandwidth parameter at the same timing when they upgraded previous 80 MHz oscillator to new 100 MHz one.
In my case, two new Buffalo II boards with 100 MHz oscillators shipped this year suffered the similar problems. After replacing the new MCU with old one that came with an old Buffalo II board with 80 MHz oscillator, the problem disappeared.

Bunpei, Post 546:
Just about two months ago. I posted the issue on their support forum.
DPLL Bandwidth setting on B II - Buffalo DAC - Twisted Pear Audio Support
However, I have received no answers from them so far.
Any DPLL Bandwidth parameter other than "default best" is very hard for any transports of I2S output to catch up because the DPLL frequency might be 64 times higher for I2S than that of S/PDIF.

BrianDonegan, Post 554
Hey, I just got your PM this morning and replied. I also just saw this. Russ just posted about it here as well: DPLL Bandwidth setting on B II - Buffalo DAC - Twisted Pear Audio Support So, the uC on the Buffalo is set to use the optimal DPLL setting, which in our testing with both the XMOS eval and our XMOS solution in development, has provided the best and lowest jitter performance.

We have not used this USB interface, so I hesitate to offer an explanation. We have had no issues with high-res material and the current firmware on the Buffalo, or we would have changed it. I would stress that most people using the Buffalo for high-res are not having any issues. If you are having success w/o the firmware chip in place, then the default DPLL settings are what you want, as it can deal with higher jitter from the source (lower jitter rejection).

Running w/o the firmware, however, means you have incorrect DAC mapping for the I2S signals, so that is not good either. We will make a "High Bandwadth" version of the firmware available to those who want it with the less optimal default DPLL. That's totally not a problem. I will add a link to the web site for people to order it (will post an URL when I have it set up).


GLT, Post 555
The real issues is that the ESS 9018 DAC has a 7-step tweakable DPLL setting below the lowest setting available in the older 9008 DAC, and that setting applies to both I2S and SPDIF with SPDIF possibly having a larger BW on the same setting as Mr Bunpei said. I have no doubt that the shipping firmware for the DAC has been tweaked for best performace rather than best customer satisfaction because this is DIY

In summary, the fact is that the Buffalo II firmware change cased compatibility issues with the following I2S devices:
  • Evo
  • Teradak
  • MicroSD Memory Card Transport
  • exaU2I
We are told by Brian Donegan that the unreleased TPA I2S interface and the XMOS evaluation board are working fine. These two devices are not a practical alternative for most users.

I agree with the explanation provided by Bunpei and endorsed by GLT - Any DPLL Bandwidth parameter other than "default best" is very hard for any transports of I2S output to catch up because the DPLL frequency might be 64 times higher for I2S than that of S/PDIF.

I believe TPA have optimized the default Buffalo II firmware for use with SPDIF at the expense of I2S compatibility. It is unfortunate that TPA blames third-party I2S devices for having noisy I2S lines or high jitter.

My position is that the use of any of the fine I2S sources with the alternative Buffalo II firmware will produce less jitter and better subjective results than using Buffalo II with the standard firmware and SPDIF. The SPDIF disadvantage of not having a dedicated clock signal by far outweigh the "drawbacks" of using DPLL Bandwidth setting compatible with I2S.

exa065
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Last edited by exa065; 19th July 2011 at 10:45 PM.
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Old 21st July 2011, 12:17 PM   #643
Bunpei is online now Bunpei  Japan
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A concise summary of how to obtain DSD audio files by ripping them from SACD using SONY PlayStation 3 (of the first generation model) is available on this Japanese blog page (In Japanese).
PC???: SACD???????!!!
The page has a lot of illustrative pictures and useful links.

I think the number of people those who start the ripping and need a good USB interface capable of playing DSD audio files will increase much.

Last edited by Bunpei; 21st July 2011 at 12:20 PM.
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Old 31st July 2011, 01:28 PM   #644
exa065 is offline exa065  Canada
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Quote:
Originally Posted by AndriyOL View Post
What a complete kit for the BIII of accessories, add-ins boards do we need to order to be able to listen 8ch 32bit 384Khz sources?
This morning I replied to a question posted on Buffalo III - flexibility without compromise. My answer appeared for a short moment and than became unavailable. I am puzzled. exaU2I complements the fine offerings of TPA and it is the only DIY USB to I2S interface that can provide 8 channels at 32bit/192kHz and 4 channels at 32bit/384kHz / DSD64 / DSD128. One would think that Buffalo III and exaU2I provide the magic mix to DIY designers to boldly go where no audiophile has gone before.

Here is my original answer to AndriyOL (reconstructed from memory):

"There is a third-party component that almost meets your requirements. exaU2I will give you the taste of 32bit resolution. The interface supports up to 4 channels at 384kHs and DSD."
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Old 31st July 2011, 01:36 PM   #645
atoluma is offline atoluma  France
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Buffalo III and exadevice interface will be my setup. Perfect combo for mutichannel I think!
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Old 31st July 2011, 02:35 PM   #646
kevinh is offline kevinh  United States
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Originally Posted by atoluma View Post
Buffalo III and exadevice interface will be my setup. Perfect combo for mutichannel I think!

I am leaning in this direction for a PC based server using the Burwen software.
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Old 31st July 2011, 02:36 PM   #647
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Quote:
Originally Posted by exa065 View Post
This morning I replied to a question posted on Buffalo III - flexibility without compromise. My answer appeared for a short moment and than became unavailable. I am puzzled. exaU2I complements the fine offerings of TPA and it is the only DIY USB to I2S interface that can provide 8 channels at 32bit/192kHz and 4 channels at 32bit/384kHz / DSD64 / DSD128. One would think that Buffalo III and exaU2I provide the magic mix to DIY designers to boldly go where no audiophile has gone before.
You should not be puzzled as they (the TPA guys) simply delete all posts that either they imagine as critical in any way or if you mention anything that could be thought of as a competing product
The TPA guys have stricter censor management than the old iron curtain guys
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Old 31st July 2011, 03:13 PM   #648
exa065 is offline exa065  Canada
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Quote:
Originally Posted by kevinh View Post
I am leaning in this direction for a PC based server using the Burwen software.
Wow. How do you buy the Burwen software?
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Old 31st July 2011, 03:29 PM   #649
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Buffalo III and exadevice indeed are great combination! Any plans to let exaU2I available outside the existing country list? I am based in Hong Kong
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Old 31st July 2011, 03:46 PM   #650
exa065 is offline exa065  Canada
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Originally Posted by ackcheng View Post
Buffalo III and exadevice indeed are great combination! Any plans to let exaU2I available outside the existing country list? I am based in Hong Kong
I apologize for the country list restrictions. We are working hard to expand our manufacturing capacity and support capabilities. Hopefully soon we will be able to expand the country list.

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