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-   -   USB2.0 to I2S for ES9018 (http://www.diyaudio.com/forums/vendors-bazaar/223817-usb2-0-i2s-es9018.html)

diyinhk 18th November 2012 04:59 AM

USB2.0 to I2S for ES9018
 
All DAC convert SPDIF to I2S signal before decode.
Everybody know I2S is far better than using one more SPDIF layer

There are many semi-solution to avoid the unlock problem of the best DAC chip ES9018 from I2S input, including changing the DPLL setting but the trade out is lower jitter rejection, use metal shielding cover the DAC chip, use super high quality clock, or use SPDIF input. All method either reduces the sound quality or the unlock problem still exist.

This 24bit 192khz USB to I2S PCB is tested with I2S input to ES9018 with NO unlock problem(default power on setting, default dpll setting, no need metal shielding cover the dac chip, no need to wait for the lock to become stable after power on)

This solution uses 49.152Mhz/45.158Mhz oscillator and it should be better than the original XMOS and other design uses only 24.576Mhz and 11.2896Mhz oscillator

Welcome to comment!

http://www.diyinhk.com/ebayimg/IMG_1289_logo.jpg

analog_sa 18th November 2012 07:54 AM

Quote:

Originally Posted by diyinhk (Post 3245840)
Welcome to comment!


Your ad is more annoying than a detergent commercial. Do you see your target market exclusively as clueless morons?

grufti 18th November 2012 07:58 AM

This thread needs to get moved to the commercial section.

I hope nobody falls for this thing because it certainly does not look good at first sight.

qusp 18th November 2012 08:51 AM

use super high quality clock.... reduces sound quality?

haha your board looks pretty ordinary and yes, please do not spam the forum with your uninformed nonsense advertisements, looking at your design I simply dont believe that it does not have lock issues at lowest DPLL.

do you believe that the hive mind of ESS DIYers on this site is using 11.xx MHz clocks? we are running 45/49 and higher quality NDK 90.xx/98.xxMHz as well as running an i2s fifo which completely removes all jitter and galvanic-ally isolates it previous to synchronous reclocking the fifo memory output. leaving only the jitter of the clock itself + clock fanout buffer. so less than 1ps total

btw, you really should use less solder

diyinhk 18th November 2012 08:55 AM

oh, I am very sorry
but can we focus the discussion on the ES9018 unlock technical problem?
I am happy to see if there is any better solution than this one exist

Many people like big capacitor, eye catching design. I also totally agree that the listening experience is subjective:D

diyinhk 18th November 2012 09:04 AM

Quote:

Originally Posted by qusp (Post 3246001)
use super high quality clock.... reduces sound quality?

haha your board looks pretty ordinary and yes, please do not spam the forum with your uninformed nonsense advertisements, looking at your design I simply dont believe that it does not have lock issues at lowest DPLL.

do you believe that the hive mind of ESS DIYers on this site is using 11.xx MHz clocks? we are running 45/49 and higher quality NDK 90.xx/98.xxMHz as well as running an i2s fifo which completely removes all jitter and galvanic-ally isolates it previous to synchronous reclocking the fifo memory output. leaving only the jitter of the clock itself + clock fanout buffer. so less than 1ps total

btw, you really should use less solder

thank you very much for your reply!
it's the first reply on the technical side I am looking for:)
I am happy to send you a free PCB to test the NO unlock issue if you are interest:D you will believe after test it

The application note of ES9018 recommend continue ground plane to the IV stage, there are some hot design use two board approach.

luxury54 18th November 2012 09:11 AM

Hi , I saw that you are selling this "new design" on ebay for 49$, so my question is what is worth the extra 20 $ from your previous design that costs only 29$ ? is it only that extra jumper added to the board for external power supply? cause judging by the pictures, I only saw that extra feature implemented from your previous design;

diyinhk 18th November 2012 09:32 AM

Quote:

Originally Posted by luxury54 (Post 3246022)
Hi , I saw that you are selling this "new design" on ebay for 49$, so my question is what is worth the extra 20 $ from your previous design that costs only 29$ ? is it only that extra jumper added to the board for external power supply? cause judging by the pictures, I only saw that extra feature implemented from your previous design;

:DThis design uses the latest CM6631A rather than CM6631, it may be the first public available cm6631a PCB.
The I2S output frequency of 49$/29$ version is different,
49version Crystal and oscillator are sourced from digikey, 29version crystal also sourced from digikey but oscillators are from shenzhen same as all current cm6631 design.
This version is target for user of ES9018, the volume is low, if the volume is high, the cost should down
hope can help, thanks

qusp 18th November 2012 09:39 AM

yeah look sorry for the obvious frustration, but we and certainly I, get tired of the forum being spammed with advertisements (mostly from your part of the world). when those advertisements hype boards using generalizations that may apply to other less technically savvy forums.... well...

there is at least 5 (probably more like 10 actually) USB->i2s boards here on the forum (some not even commercial designs) that use 45/49 and higher clock speeds for ESS and i'm not aware of ANY that use the lower speeds you speak of, some use isolated outputs, some not, some provide mulrichannel hires PCM/i2s and DSD over USB, with speeds up to 8 channel 32bit/352/384kHz for PCM, or DSD512 for DSD

they include buffered outputs with differential clock drivers, u.fl or w.fl micro BNC connections, 4 layer boards etc etc

so unsolicited ads like yours become the equivalent of junk mail in my letterbox...

diyinhk 18th November 2012 10:11 AM

Quote:

Originally Posted by qusp (Post 3246050)
yeah look sorry for the obvious frustration, but we and certainly I, get tired of the forum being spammed with advertisements (mostly from your part of the world). when those advertisements hype boards using generalizations that may apply to other less technically savvy forums.... well...

there is at least 5 (probably more like 10 actually) USB->i2s boards here on the forum (some not even commercial designs) that use 45/49 and higher clock speeds for ESS and i'm not aware of ANY that use the lower speeds you speak of, some use isolated outputs, some not, some provide mulrichannel hires PCM/i2s and DSD over USB, with speeds up to 8 channel 32bit/352/384kHz for PCM, or DSD512 for DSD

they include buffered outputs with differential clock drivers, u.fl or w.fl micro BNC connections, 4 layer boards etc etc

so unsolicited ads like yours become the equivalent of junk mail in my letterbox...

Thank you for your understanding, I am also very sorry if the first post causes problem. I should missed some great USB to I2S design, but the complexity and cost of this PCB should be the lowest for es9018 to run with I2S input without unlock problem for higher quality sound that SPDIF:D The two recent famous USB->i2s design tested with ES9018 in this forum uses 24/22 oscillators, according to the ES9018 datasheet 192*fs is minimum, this two clearly is not enough for use to run es9018 at syn dpll clock even at 192khz. Without syn dpll clock to i2s signal, there are power on stable problem and sound distortion issue as we know.


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