many thx to „Janos_904“ over at the Diyaudio.com-forum->http://www.diyaudio.com/forums/digital-line-level/314935-es9038q2m-board-3.html?s=b2de8136b3f09c3da9f11088b3614efb
there is a new pic + description:
->“My board have just arrived ! I was surprised, because of the fast shipment and the very good quality. It is so much better than the cheapo ES9018K2M board. There are good quality smd components, and the module comes with Nichicon FW (yellow/black) and Elna RW3 (brown) capacitors. The consumers of the DAC chip are isolated well (see red circles). There are plenty of upgrades available for DIY-ers! I installed a Superreg instead of the KA7808 reg, and +/- 15 V superregs for the opa. The sound with 3 superregs using coax is good, full with live, and detailed even with the stock JRC5532DD.“
here´s another, fresh, ES9038Q2M-forum-link: http://www.diyaudio.com/forums/digital-line-level/314935-es9038q2m-board.html
by that i´ve found some further, interesting pictures concerning the „targeted“ DIY-DAC !! 😉
first, i´ve found another ES9038Q2M-chinese-board with a 15V (DC)-plug->
second here´s also again a little „picture“-description“ how to connect a „DSD„-Led to a XMOS-Usb-Bridge.. 😉
and third, heres a picture how to connect a bluetooth-receiver-modul (CSR-8670/8675) directly to an ES9028Q2M (in this case) via I2S..
here are first reviews on the ES9038Q2M-chinese-Boards:->http://www.diyaudio.com/forums/digital-line-level/297351-chinese-es9018k2m-i2s-dac-post5240556.html (many thanks to „Drone7“ there.. 😉 )
->“First impressions… I am quite surprised… My Diyinhk 9018k2m with 3x custom power supplies is bested by this 9038q2m using a single 15+-0-15- supply. (plenty of opportunity here for upgrading )
It does not have the ‚clinical‘ presentation I associate with ESS chips… and seems warmer and fuller yet without sacrificing detail.
Resolution and soundstage is noticeably better than the 9018k2m .
I have wired a 50k audio taper pot and can adjust volume. Not a big range but enough to use as a ‚digital controller‘ direct to a power amp.
Using a rotary switch to change inputs. No switching noises ! Very smooth operation.
Will try switching filters next but can’t see the need really. Who changes filter on a track by track basis? .
I would rather listen to one for a week then try another and eventually settle on a preferred filter then leave it jumpered.
Inputs tested …Usb to i2s, optical, and coax all work.
… so far no direct i2s driver to be found..:-(
I am using a usb to i2s (raspberry pi player) interface and this works ok mostly… lock not achieved unless the dac is switched on while the Pi boots. If it is on first the Pi does not recognise it.
If anyone finds a dtoverlay for this I would be most interested…“
Maybe on the drivers AUDIOPHONICS I-Sabre DAC ES9028Q2M Raspberry Pi ?
Tried that . Does not work..
I recall reading that the 9038Q2m is equivalent to two 9018k2m so drivers may be very different..
you are not getting noise or glitches between tracks or on changing sample rate tracks – even on high res?
Nope, no noises,clicks,pops or otherwise. Plays smoothly when moving from 24/96 to DSD to 16/44..
Using usb to i2s.(XMOS USB U8->https://www.ebay.com/itm/XMOS-U8-USB-384K-32B-module-I2S-SPDIF-output-support-DSD-for-es9018-DAC-hifi-amp/282706307492?hash=item41d29be9a4:g:bgsAAOSwoVNZ7xy~
3pole 4position switch.
Position 1 connects as if jumper J2=optical spdif in,
position 2 as if jumper J3=coax spdif in,
position 3 as if jumpered both J2 & J3=i2s in,
position4 no connection so acts as mute.
It matters not which pin the black wire connects to on that side on the board header as they are all shorted to each other.
(Board power supply: AC 15-18VX2 (3 lines) + AC 7-12V (2 lines))
here are btw. some new ES9038Q2M-chinese-board pictures..
the board-layout seems to be changed to 1.04 and you can see how you can apply a input-selector switch to this..
(connected to JP2 and JP3; as described earlier and again on picture 3)
(basically you can do this too with another selektor on the other pins, so that u can change the different digital filter settings..(FIRs))
(Beware: according to some sources 0=Connection , X=Disjoin !!!)
This product is finished board, using the latest audio DAC ES9038 Q2M as the core design, comprehensive deep software control optimization, PCM DSD switch no sonic, 3 groups of inputs can be simultaneously access, jumper smooth switch
Product features are as follows:
1. Onboard MCU MCU, used as a pure IIS / DSD input DAC board
2. Support coaxial and fiber input, support PCM44.1Khz-192Khz / DSD64 hard solution
3. Onboard to provide volume control interface, connect a single 10KR or so potentiometer that can achieve volume control.
4.ES9038Q2M better than the previous generation ES9028Q2M sound, thicker thick flow, direct support for coaxial fiber DOP, DSD direct solution, 129dB DNR -120dB THD + N quite excellent.
5. With the board default 5532DD op amp, use the transport seat to facilitate the customer to upgrade the fever of the op amp
6. The use of imported high-precision active crystal
7. The use of high-quality gold-plated RCA, metal shield headphone output interface
8. Carrier signal lock indicator and DSD signal indicator
Coaxial: PCM44.1K-192K 24BIT / DOP DSD64
Fiber: PCM44.1K-192K 24BIT / DOP DSD64
IIS / DSD: PCM44.1K-384K 32BIT / DSD64, DSD128, DSD256
Output: Dual-channel single-ended RCA output, 3.5 headphone monitor output
Power supply: regulated DC voltage double 15V or regulated DC voltage single 15V
* It is recommended to use dual 15V power supply to play board best results
(more information also here (about the chip)->http://bbs.hifidiy.net/thread-1257220-1-1.html)