Anybody using the new ESS Vout DAC (ES9022)? - Page 17 - diyAudio
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Old 10th June 2011, 07:05 PM   #161
2A3SET is offline 2A3SET  Canada
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Default pump and VREG capacitor

Just replaced with BlackGate N on my audio-widget for PUMP and VREG capacitor first, then +/- supply bypass, sounds pretty good, less harsh and quieter background (using USB power now). ES9023 3.3V is regulated by ADP-151.

Any recommendation over sync/async clock is appreciated.
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Last edited by 2A3SET; 10th June 2011 at 07:07 PM.
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Old 12th June 2011, 05:02 PM   #162
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Quote:
Originally Posted by 2A3SET View Post
Just replaced with BlackGate N on my audio-widget for PUMP and VREG capacitor first, then +/- supply bypass <SNIP>
What values for which locations?

TIA!

Greg in Mississippi
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Old 12th June 2011, 05:51 PM   #163
massimo is offline massimo  Italy
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Greg, take a look here: Open-source USB interface: Audio Widget
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Old 13th June 2011, 12:37 AM   #164
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Default Another EUVL ES9022 Board commits music!

I spent some time over the last week or so getting installing one of Patrick's ES9022 cards into my digital source, with final installation this morning. I'm using a computer playback system based on the cMP formula, but with extensive power supply upgrades (ALL supplies are fully linear including the one powering the computer motherboard).

The digital output is via an ESI Juli@ PCI sound card, which has separate digital and analog sections. By removing the analog section, you have access to the I2S lines and can easily connect them to a DAC. In the past, I've mounted other custom DAC cards on Juli@ digital sections including several variations based on the AK4397 & AK4399 DACs along with a Twisted Pear Buffalo32 that I setup for a friend (based on that experience, I have a TP Buffalo-II here waiting for me to find time to implement it).

I modified the Juli@ a bit by upgrading the power supply lines (increased local filter caps plus upgrading the 3.3v regulator that powers most of the digital chips to a Dexa regulator). I also cut the +5v & +/- 12v power feeds on the PCI connector of the card and feed it from separate linear supplies instead of the motherboard power.

The combo of Patrick's card and my modified Juli@ sounded pretty good right away. Now both the sound card and the ES9022 card have run all day and are improving as they warm up and break-in. Sound is now very respectable... definitely in the same region as the highly-tweaked AK4399-based DAC card w/high-current high-speed video buffer output stage that was perched on a Juli@ digital section before... and not far from the Buffalo32.

Attached are a few pictures of the ES9022 card mounted on the Juli@. Patrick's ES9022 card needs a 9v and a 6v input and I feed it from a couple of Dexa as pre-regulators (The raw DC I used for the AK4399 card and it's output stage were +/- 19v & +12v and I needed to knock them down before feeding them to Patrick's board).

I'm pretty impressed and Patrick's card is a great value. Looking over his implementation, I see very few things I might want to upgrade... Mostly I'm interested in trying higher-test regulators to bypass the on-card 1763's. I'll go either with Dexa or small Salas-ish shunts mounted very close to the card & feeding just past the existing regulator outputs. I also may try different output filter caps... maybe AMTRANS boutique-types. Other than that, I'll likely leave it alone... not sure I can otherwise improve on he'd wrought.

I am talking with Patrick on getting a 2nd card to try in Synch mode. The Juli@ digital section has two clocks, 22.5792 MHz (used for 44.1 & it's multiples-sampling rates) and 24.576 MHz (used for 48 & it's multiples). I generally upsample in the computer to 192, so a 49.152 Mhz clock divided down to 24.576 MHz should theoretically work well.

I'll post updates when I get around to either the regulator or synch-mode upgrades.

Greg in Mississippi
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Old 13th June 2011, 01:27 AM   #165
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P.S. Massimo, I forgot to say 'THANKS!' for the link. That post answered my questions entirely... and I may try upgrading those caps after doing my regulator upgrades.

P.P.S. I also forgot to say that powering the Juli@ separate from the motherboard power and upgrading the on-board regulators made a very significant difference in sound quality when I did that a couple of years ago. The AK4358 DAC on the analog section did very well and it took a couple of iterations of my AK4397/AK4399 implementations to truly best it. I suspect that bypassing the mixing and output stages on the analog section might allow it to keep pace with the newer DACs in most areas of performance... that's a 'someday when I get time' project.

Greg in Mississippi
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Old 20th June 2011, 05:14 AM   #166
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Default A different application of the ES9023

There has been a lot of interest using the 9022/23 with SD players and lately PCs. I wanted to see what could be made of it for a more generic conventional DAC that supports 44.1 to 192KHz rates for use with CD and SACD transports as well as perhaps a PC.

I started it a year ago with no time to finish. The layout has been sitting around for three or four months waiting for some time so I finally finished up and built one...

It uses the Wolfsen 8804 receiver in hardware mode and the 9023 with a DCB1 type follower configured as a second order low pass filter. I added the follower because I intend to drive a stepped attenuator or low value pot directly into a headphone amp for an all battery powered version later on. EUVL suggested the Bessel, so I made accommodation for both a simple datasheet first order filter with a buffer as well as the second order filter. Thanks Patrick as I believe it sounds better with it...

As you can see it is mostly SMT. I stayed away from ceramics except for the 12MHz crystal load caps (NPO types). Bulk caps are SP series Panasonic and the bypass and others are Panasonic SMT film. You can pretty much glean everything else you might want to know from the picture. Not anywhere near the least expensive way to go, but we do this for our own enjoyment so we can make these nth degree choices with a clear conscience, right?

The power supply behind the DAC is a line supply with filtering and follower type pre-regs to minimize noise and improve the line rejection of the DAC regulators at higher frequencies. Not as quiet as bateries, but getting closer... I will build another one of these for battery power with this part lopped off for use with the head amp later on.

Highly recommended for those brave enough to try. It sounds great!


Dave
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Old 20th June 2011, 06:50 AM   #167
EUVL is offline EUVL  Europe
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> with a DCB1 type follower configured as a second order low pass filter

LSK389 for the DCB1 ?
Same here.




Patrick

.

Last edited by EUVL; 20th June 2011 at 07:06 AM.
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Old 20th June 2011, 07:15 AM   #168
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Hi Patrick,

>One XO for both ? What freq ?
No, 50MHz XO for the 9023 and a 12MHz crystal for the 8804. In hardware mode this makes it useful from 44.1 to 192KHz (minus 176.4K of course). Having the elastic buffer 8804 is beneficial here over a CS part in my opinion even though the 9023 has good rejection.


I have a different XO coming to try once available as well. 30-40% lower phase noise throughout the spectrum. May not make one bit of difference but I want to try.

>LSK389 for the DCB1 ?
Yes. I'm using it at 14 volts across the pair and want to experiment with higher and lower voltages to see if there is a sweet spot. I also want to change the cutoff as I think the datasheet values' frequency makes it just a tad bright compared to a 9018. The DCB1 LPF should make this easier to do without adding noticeable distortion...


Dave
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Old 20th June 2011, 07:39 AM   #169
EUVL is offline EUVL  Europe
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> Yes. I'm using it at 14 volts across the pair

I use 18 (+/-9V). Also handy with batteries.

> The DCB1 LPF should make this easier to do without adding noticeable distortion...

You can also do that (vary freq) by changing the output shunt caps without the Bessel.
The difference is that it will always be first order.

Rest see email.


Patrick
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Old 20th June 2011, 02:01 PM   #170
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Fitz, that looks great (and I'm sure it sounds as good as it looks!).
Do you happen to have any extra PCBs? I'm sure many would be interested.
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