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))