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Old 11th November 2012, 06:20 AM   #41
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by Bunpei View Post
The kit will be released early next month if possible. He will accept orders through his web page.
The final price is not decided yet. However, he is making his efforts to keep it in the same price range of his UDA board kit.
The kit was released on last Thursday but sold out within two or three hours. Its domestic price is 22,800 JPY. The next release will be planned on the next month.

His formal announcement is available on this page;
AUDIO? FPGA?? (in Japanese)

Some bloggers are already reporting the board.
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Old 11th November 2012, 07:03 AM   #42
Shinja is offline Shinja  Japan
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Quote:
Originally Posted by Bunpei View Post
He says the board has achieved a filtering performance comparable to DSD1794A.
I think it is misunderstanding.
Electrart says the board employs the same filtering algorism to DSD1794,analog FIR filter and post filter, not the performance.
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Old 11th November 2012, 09:40 AM   #43
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by Shinja View Post
I think it is misunderstanding.
Electrart says the board employs the same filtering algorism to DSD1794,analog FIR filter and post filter, not the performance.
Dear Shinja,

Thank you very much for your indication of my error.
You are correct.

Best regards,
Bunpei
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Old 11th November 2012, 12:05 PM   #44
Bunpei is offline Bunpei  Japan
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Originally Posted by Bunpei View Post
He may distribute a bare board.
Bunpei received a bare board from ElectrArt as a beta-tester and built it based on the schematic.

Please look at the picture attached below. The board is connected to his PCM2DSD converter board ( which is connected to his USB Dual Audio board).
By using this board you can listen to all the DSD sources, ranging from DSD64 to DSD512, without any commercial DAC chips!

Bunpei thinks the resultant sound is very satisfactory.
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File Type: jpg DSD_Principle.JPG (129.3 KB, 506 views)
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Old 11th November 2012, 04:39 PM   #45
lm1no2 is offline lm1no2  Norway
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Only images. However, it is not available.
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Old 12th November 2012, 10:23 PM   #46
Bunpei is offline Bunpei  Japan
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Originally Posted by lm1no2 View Post
... However, it is not available.
He has not released it as his product yet. I guess he is considering.

I think his schematic is very useful to learn a necessary filtering for DSD.
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Old 13th November 2012, 11:53 AM   #47
qusp is offline qusp  Australia
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very interested in the 1bit DSD 'DAC' raw PCB when ready again, I cannot find a product page.... just the analogue filter I have all other parts of the signal chain, if that goes well I may look at his USB boards, but I dont need the PCM2DSD convertor
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Old 13th November 2012, 11:14 PM   #48
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by qusp View Post
very interested in the 1bit DSD 'DAC' raw PCB when ready again, I cannot find a product page.... just the analogue filter I have all other parts of the signal chain, if that goes well I may look at his USB boards, but I dont need the PCM2DSD convertor
His blog page in Japanese is;
ElectrArt?Digital Audio???
His product page;
Electrart SHOP

His "DSD Principle Board" is not shown in the product page above yet because he has not made his final decision. Only in his blog page so far.

His series includes,
1. USB Dual Audio (DDC)
2. PCM to DSD256, DSD512 converter (Delta-Sigma Modulator)
( 3. DSD Principle board (DSD filtering) )
4. TI DSD1794A DAC board compatible to 1. or 2.
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Old 14th November 2012, 06:44 AM   #49
qusp is offline qusp  Australia
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yeah I looked at all the stuff in the shop, quite interesting, though at these speeds I would have hoped for better connections than jst. so its interesting stuff, but i'm mainly interested in DSD principle board. is he deciding whether to release publicly instead of holding onto the intellectual property and selling a product, or just whether or not its up to his standard?

I just notice that they also used to give away schematics and code for his digital filter FPGA, but they were then withdrawn, I presume because hes selling the intellectual property in products or has licensed it?

Last edited by qusp; 14th November 2012 at 06:46 AM.
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Old 14th November 2012, 01:07 PM   #50
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by qusp View Post
 ... but i'm mainly interested in DSD principle board. is he deciding whether to release publicly instead of holding onto the intellectual property and selling a product, or just whether or not its up to his standard?
...
First, he updated his schematic for the "DSD Principle board". He has given resistor values for the 8 tap FIR.

I am communicating with him by e-mails. My impressions are;
- He seems to think the board is an assembly of well-known circuits in this field. He does not intend to claim any specific his originals there.
- I have no idea how he will release the "DSD Principle board". Just a bare board or a kit with major components? Or no release?
However, if we request a release eagerly, I think he may possibly release the board with a reasonable price.
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