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Old 2nd December 2009, 03:37 PM   #721
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by Russ White View Post
I have access to pro gear which outputs 32bit I2S and/or DSD. ... Do a little googling and you can find some pro-gear that does.
Thank you very much again for your answer. I will try to google that kind of pro-gears!
Bunpei
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Old 5th December 2009, 05:29 AM   #722
Spirit02 is offline Spirit02  Peru
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Originally Posted by Russ White View Post
I am hoping to have the layout finished this weekend.
How'd you go Russ?

Quote:
Such as DSD,PCM, and SPDIF input with no hassle.
I presume it will still take an I2S stream too?

Waiting (im)patiently! :P

Keep up the good work
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Old 5th December 2009, 03:04 PM   #723
BrianDonegan is offline BrianDonegan  United States
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Twisted Pear Audio - Buffalo32S (ES9018 DAC)
Pcm = i2s
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Old 6th December 2009, 01:21 AM   #724
Russ White is offline Russ White  United States
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Quote:
Originally Posted by Spirit02 View Post
How'd you go Russ?


I presume it will still take an I2S stream too?

Waiting (im)patiently! :P

Keep up the good work

Hi,

Thanks for the encouragement. One of the very cool things about having so much time wrapped up in designing for this chip, is I have had so much experience on which to draw while I have designed this new board.

The new board builds on the experiences gained and I have put a lot of time and work into it. A lot of prototyping and proving ideas. A lot of "back to the drawing board" moments.

After all that, I really think I have something very special now. I don't want to give away too much yet. But new production boards are ordered and should be here in days. All that's left is to build up a couple, and then ramp up for production.

There are some really cool features in the new board. You don't lose any of the things you like about the Buffalo, and you gain a lot of options.

Each of the digital supplies is on-board and ready to roll, but each can be defeated and external supplies used. There are headers to support this. It's your choice.

The board supports the same flexibly in regard to stereo or mono input formats as buffalo(and buf32S) did. Consumer or TTL level SPDIF, as well as DSD or PCM. Configuration is simple as always.

The output stage is separate, but not compromised. I worked hard a new layout for IVY II that has an extremely short signal path at the critical input section. It also has some new changes that reflect the experiences I have had in designing output stages for this chip.

Also there is a wicked cool little plug-in extremely low impedance/low noise shunt regulator for AVCC that is something very special. It solves a lot of technical hurdles which have always been present, and are not simply remedied. It is the best solution I have found so far.

Even the clock section on the PCB allows for using the on-board XO with a crystal, or the same ultra low phase noise clock of the Buf32S. It can be built either way.

The board exposes all of the parts of the circuit one may want to experiment with. You can change supplies, output stages, clocks, firmware, etc.

The layout is optimized with an eye on EMI and especially to get the most out of the chip. I really worked hard on the ground plane strategy and the supply bypassing. Buffalo was a good first effort, and Buf32S grew into something incredibly successful and personally satisfying beyond my hopes. Now, "Buffalo II" as I am calling it is a natural evolution based on the experience and success of those two projects (not to mention the COD and Opus) as well as the result of requests many people had. This new PCB fulfills many of my own wants and brings to fruition some my own new ideas. I didn't want to just "redo" Buffalo. Really, what I wanted was to draw inspiration from it while working on something much better.

It has been a long time coming, but that's because the new design took a lot of work to get right. Lots of prototyping bits and pieces and working details out. I am a designer. The joy is not just in the result, but the work.

So thanks for being patient. I hope you enjoy the Buffalo Ii as much as I have enjoyed working on it.

Thanks to you guys who help keep me excited about this stuff. Especially thanks to Brian. There is no Twisted Pear Audio without you man.

Cheers!
Russ
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Last edited by Russ White; 6th December 2009 at 01:42 AM.
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Old 6th December 2009, 05:24 AM   #725
FAA is offline FAA
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any idea about the price?
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Old 6th December 2009, 10:53 AM   #726
back is offline back  Greece
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and when is the release estimated?
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Old 6th December 2009, 11:47 AM   #727
BrianDonegan is offline BrianDonegan  United States
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Quote:
any idea about the price?
Not yet.

Quote:
any idea about the price?
I am shooting for early January, but a lot of things have to happen between now and then. Hopefully, the upcoming holidays don't make it drag out. We will know more once this next batch of protos get built and tested.
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Old 6th December 2009, 12:50 PM   #728
jgazal is offline jgazal  Brazil
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These are great news.

Flexibility (tweaking) equals to hi-fi diy heaven!

Closed layout (no tweaking) equals to boring little higher fidelity...

Glad TPA has chosen the first way.

Best regards,

Jose Luis
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Old 6th December 2009, 12:54 PM   #729
Ed LaFontaine is offline Ed LaFontaine  United States
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Russ posted:
Quote:
...I am a designer. ...
I say you are an artist.

Come on man! Embrace your artsie side...
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Old 6th December 2009, 09:39 PM   #730
NicMac is offline NicMac  Italy
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Twisted Pear Audio - Buffalo32S (ES9018 DAC)
Russ and Brian,
Take your time..... Patience is a virtue! (I would love to beta-test......)
Buffalo B32S is great - and I hope Buffalo II will be even greater!!
Thanks for designing and making it available for the DIY-community!!!!
Nic
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