hi there, 😉
came by chance about this „Forum-Idea“; its absolutely Beta and looks horrible (just a test if it will be accepted)..
One advantage is that u dont have to be registered; but you can also post/open a thread..
lets see if it will work out..
(Categories are (for now): ES9038Q2M, ES9028Q2M, ES9018K2M, Hifi-Dacs, STM32F103C8T6, RPI 3B, Drivers, etc..)(more maybe to come))
(http://essabre-90xx-rpi.sfb2.com/forum/) (theres also a link in the header)
(PS.: but beware, u have probably to „unsolder“ 2 jumper/bridges..depends on you delivered version (+15V/-15V or only +15V) )
„Sat in your „lab““ 😉
(an allusion to Kate Bushs „Sat in your lap“) 😉
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.“
again some pictures from the above mentioned Skysong-XMOS-XU208 in „action“: 😉
(this (above) should be (explanation at the bottom) „PCM„/“384khz„)
according to the primary post->http://essabre-90xx-rpi.sfb2.com/2017/11/skysong-xmos-usb-xu208/ and this „Singxer Q1-Diagramm“ theres the fourth Led in the upper right a „PCM/DSD“ indicator (and not what i´ve written „Power“-indicator->u have to zoom in the picture)
(more information in the original post->http://essabre-90xx-rpi.sfb2.com/2017/11/skysong-xmos-usb-xu208/ )
a little Status-update concerning this article->http://essabre-90xx-rpi.sfb2.com/2017/11/dsd-led-volume-and-fir-buttons-on-these-es9028q2m-boards-diy/
I´ve connected a 4-dip Button and i can confirm that it works !!…for the Vol+ and the Vol- square..thought the bottom (left on the picture) 4pin-square is for the FIRs (digital filter settings), but apparently not..
(PS.: and it sounds very good !! (absolute better than per software/-mixer !!))
(Edit: to be correct->its not really a HW-mixer/volume control; it only just increases the „internal“ volume „in“ the chip; but it has really, super interesting effects on the output; think its only a change by 40% (up and down) or so; but very interesting !!, u must try it by yourself)
so the only last 4pin square is the „input“-one..cause i have no other inputs and mainly dont know where to connect on this board, this question stays unanswered..
The LEDs on the other side (PCM and DSD) stay dark/nothing..tried a lot..
by that, maybe in future i can read out the MCU on this ES9028Q2M via the „SWIM“-interface, because the ST-LinkV2 which i actually bought could/should also be used for 8bit/this MCUs..
(Edit 11/12/2017): tried to read out the onboard MCU STM 8S103F3 via the „SWIM“-interface and with a ST-Link V2->didnt got it to work too; always a „St-Link-USB communication error“; so long for now..)