Twisted Pear Audio - Buffalo32S (ES9018 DAC)

[BrianDonegan]

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.

[avr300]

Originally Posted by BrianDonegan

...to allow wireless stacking...

In what frequency range ??

[realmadrid]

Originally Posted by Russ White

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

[Spirit02]

Originally Posted by Russ White

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

[Russ White]

Originally Posted by realmadrid

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.

[SoapSeller]

Originally Posted by BrianDonegan

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.

[BrianDonegan]

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.

[Joshua_G]

Shipping date is fine with me.
I just made an order.
Thank you, guys.

[Magsy]

Awesome, sold out in two n half minutes!

Can't wait

[BrianDonegan]

There is a second batch at 8am. I was hoping they would not go this fast, but what can ya do?