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Old 6th February 2010, 06:51 PM   #821
BrianDonegan is offline BrianDonegan  United States
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I am actually investigating supplying parts to allow wireless stacking. I think I am on to something, and if it works out, I will supply them in the kits.
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Old 6th February 2010, 07:29 PM   #822
avr300 is offline avr300  Denmark
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Quote:
Originally Posted by BrianDonegan View Post
...to allow wireless stacking...
In what frequency range ??
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Old 6th February 2010, 08:37 PM   #823
realmadrid is offline realmadrid  Sweden
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Quote:
Originally Posted by Russ White View Post
Three things,

One - mathematically you would not need 100mhz (you would only need about 68mhz) to get 352.8khz (assuming you use I2S) 80mhz should be more than enough.

Two - 100mhz is at the very maximum for the master clock.

Three - I am not sure that the OSF on the ES9018 will correctly handle 352.8khz sampled data. You would probably have to run in OSF bypass mode. I am not sure on this though

Maybe Dustin could chime in.

In short I personally would not recommend a 100mhz clock.

Cheers!
Russ
Russ
Mr Bunpei from
MicroSD Memory Card Transport Project
write:
A plain SDTrans192 is capable of playing 352.8 kHz / 24 bit WAV files using
on I2S interface.
No options are required.

We are not sure that Twisted Pear Audio Buffalo II DAC supports 352.8 kHz /
24 bit I2S play or not.
Our concern is a processor clock frequency for ES9018.
In the case of ESS ES9018 2ch Evaluation Board, 80 MHz clock was not enough
for a stable play.
An oscillator of 100 MHz was necessary according to our experience.
We guess Buffalo II DAC may have 80 MHz oscillator.
Would you please ask Twisted Pear people about this?
Can you confirm that?

Best regards
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Old 6th February 2010, 08:55 PM   #824
Spirit02 is offline Spirit02  Peru
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Quote:
Originally Posted by Russ White View Post
It is the result of 2 years research and development.
Surely you need at the very minimum, 4 1/2 years of R&D for it to be worth writing about
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Old 6th February 2010, 09:06 PM   #825
Russ White is offline Russ White  United States
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Quote:
Originally Posted by realmadrid View Post
Russ
Mr Bunpei from
MicroSD Memory Card Transport Project
write:
A plain SDTrans192 is capable of playing 352.8 kHz / 24 bit WAV files using
on I2S interface.
No options are required.

We are not sure that Twisted Pear Audio Buffalo II DAC supports 352.8 kHz /
24 bit I2S play or not.
Our concern is a processor clock frequency for ES9018.
In the case of ESS ES9018 2ch Evaluation Board, 80 MHz clock was not enough
for a stable play.
An oscillator of 100 MHz was necessary according to our experience.
We guess Buffalo II DAC may have 80 MHz oscillator.
Would you please ask Twisted Pear people about this?
Can you confirm that?

Best regards
I have already answered this once.

They used the demo board's stock 40mhz clock, which would not work.

They did not use an 80mhz clock or it would have worked.

All that is required is 68mhz for 353khz playback.
__________________
Less pulp more juice Twisted Pear Audio.
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Old 6th February 2010, 09:23 PM   #826
SoapSeller is offline SoapSeller  Israel
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Quote:
Originally Posted by BrianDonegan View Post
I am actually investigating supplying parts to allow wireless stacking. I think I am on to something, and if it works out, I will supply them in the kits.
I hope that it will works out.
It will be great to have the parts in the kit.
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Old 6th February 2010, 11:47 PM   #827
BrianDonegan is offline BrianDonegan  United States
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I am pushing the planned ship date out a week, the the week of March 15th. I might be able to beat that still, but want to be safe.
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Old 7th February 2010, 12:04 AM   #828
Joshua_G is offline Joshua_G  Israel
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Shipping date is fine with me.
I just made an order.
Thank you, guys.
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Old 7th February 2010, 12:07 AM   #829
Magsy is offline Magsy  United Kingdom
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Awesome, sold out in two n half minutes!

Can't wait
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Old 7th February 2010, 12:09 AM   #830
BrianDonegan is offline BrianDonegan  United States
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There is a second batch at 8am. I was hoping they would not go this fast, but what can ya do?
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