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MicroSD Memory Card Transport Project
MicroSD Memory Card Transport Project
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Old 2nd January 2012, 08:55 AM   #401
hirez69 is offline hirez69  Europe
Account disabled at member's request
 
Join Date: Feb 2008
Quote:
Originally Posted by Bunpei View Post
Chiaki has his consideration on three plans.

1. Release of DSD covering upgraded firmware & FPGA configuring EEPROM for domestic SDTrans384 users
In Japan he has started the release for volunteered users. This upgrade requires no hardware modification on the board.
(You may need changes in wiring for interconnection to your DAC.
I2S_______DSD
MCLK_____MCLK
DCLK_____DCLK
LRCK_____DSDR
SDAT_____DSDL
)
You can play DSD64, DSD128 & DSD256 DSDIFF format files.
After quality assurance checking by domestic users is completed, we will announce an upgrading plan for oversea users. The upgrade is not free.

2. Release of SDTrans384 V3.0 board kit
Chiaki has a draft plan of releasing totally 30 pieces in the next batch.
The number of sets assigned for an oversea distribution will be around ten.
The price may be raised in a reasonable range because DSD play functionality is added.
Please wait for our announce in the next year. The timing will be in the near future.

3. Making of release version of Sync-option for SDTrans384 V3.0
The option consists two modules.
One is a sub board attached to SDTrans and another is a small board connected to ES9018 based DAC board. The DAC side board has two oscillator devices for master clocking, 90.3168 & 98.304 MHz on ES9018. The oscillators are made by NDK(Nippon Denpa Kogyo) and very expensive. They require a long delivery period, about 3 months.
The board must be compatible for TPA Buffalo II and III.
However, the price expected is far expensive than the base price of DACs.
Chiaki has a concern to demand for such a board.
We need your frank opinions on your demands.

Bunpei
Dear Bunpei,
I wish you and Chaki Happy New Year.

I'm interested in option 1 and 3.
Thank you.
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Old 2nd January 2012, 09:19 AM   #402
ccliu is offline ccliu  Taiwan
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Join Date: Oct 2007
Hi Bunpei,

For short term, I would like to try option 1. For long term, option 3 is the best solution for me. Please count me in. Thanks!
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Old 2nd January 2012, 10:11 AM   #403
CeeVee is offline CeeVee  Portugal
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MicroSD Memory Card Transport Project
Hi Bunpei,

Count me in for option 2 please
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Old 2nd January 2012, 04:45 PM   #404
Bunpei is offline Bunpei  Japan
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Join Date: Aug 2008
Quote:
Originally Posted by staccatiss View Post
What is the difference between 3. and the way it is connected in the photo?
Hi, staccatiss! A happy new year!

I'd like to explain SDTrans384+Sync option more.

First, the option targets ESS ES9018 DAC chip only.
Two oscillators generating a synchronous master clock for the ES9018 are located on a sub board attached near to the DAC chip.
The master clock signal, 90.3168 MHz (44.1 kHz x 2048) or 98.304 MHz (48 kHz x 2048) is forked into two ways. One is fed to ES9018 directly and another is sent back to SDTrans via a LVDS line included in a HDMI cable.

In the SDTrans side, another interfacing sub-board is attached. The sub-board receives the master clock signal and divides it by 4. The divided signal is compatible with the conventional master clock signal in SDTrans.
SDTrans runs based on the master clock and send I2S or DSD signals to the sub-board in the DAC side via LVDS line on HDMI cable.

The frequency of the master clock is switched by a logic circuit on the DAC side sub-board under the remote commands sent from SDTrans side via an I2C line included in the HDMI cable.

On the other hand, in the case of conventional synchronous master clocking scheme on SDTrans, 90.3168 MHz (44.1 kHz x 2048) or 98.304 MHz (48 kHz x 2048) master clock is generated from oscillator of 22.5792 MHz (44.1 kHz x 512) or 24.576 MHz (48 kHz x 512) within SDTrans using DPLL multiplier function implemented on FPGA. The master clock signal is sent from SDTrans to the DAC.

Chiaki assumed that quality of a master clock signal directly obtained from oscillator module must be better than that obtained by a DPLL multiplier.

I wish my description helps your understanding.

Bunpei
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Old 2nd January 2012, 07:42 PM   #405
johnYks is offline johnYks  Australia
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Join Date: May 2006
Hi Bunpei,

Count me in for option 2 OR 3 please.
Rough indication of price would be useful.
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Old 2nd January 2012, 11:33 PM   #406
davewantsmoore is offline davewantsmoore  Australia
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Join Date: Sep 2009
Location: Australia
Quote:
Originally Posted by Bunpei View Post
I'd like to explain SDTrans384+Sync option more.
Thankyou.

I would like to be included in (overseas) option 2 please.
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Old 3rd January 2012, 02:58 AM   #407
randytsuch is offline randytsuch
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Join Date: Jan 2003
Location: LA
I would also like to be added to the overseas list.

Can you PM me the pricing?

Thanks
Randy
__________________
My system is here
http://randytsuch-audio.blogspot.com/2005/10/my-system.html
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Old 3rd January 2012, 03:04 AM   #408
ihear21khz is offline ihear21khz  Malaysia
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Join Date: Feb 2009
Option 2 and 3 for me thank you.
David
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Old 4th January 2012, 05:49 AM   #409
pinnocchio is offline pinnocchio  Canada
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Location: Montreal
Just a few questions here...

I have not read all 40+ pages so sorry if those questions were previously answered...

Can this board play PCM encoded FLAC files (eg 16/44.1, 24/88.2, 24/192, etc...).

Does it support only SDcard or other interfaces?

Option 2-3 interest me but pricing would be great to know.

Thanks
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Old 4th January 2012, 07:20 AM   #410
Big Brown is offline Big Brown  Singapore
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Please consider me for option 2 kit(overseas).
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