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..)
because there are here so many searches concerning „Moode Audio“-image here´s a „install-script“ for an almost automated install->moode-automatic-install
its from the „official“ Moode-/supportforum->http://www.diyaudio.com/forums/pc-based/271811-moode-audio-player-raspberry-pi-1160.html
and there´s also a new „driver“-package for the Audiophonics ES9028Q2M linux-kernel 4.9.51..it came across via the „Volumio“-forum because the hardware-volume wasnt working for the new Volumio-releases..(but this is absolute „Audiophonics ES9028Q2M-related because they implemented this „HW-Volume-control“)..->Q2M_kernel_4-9-51
but another thing is, if i look in the archive there are such „i-sabre-codec.co and i-sabre-k2m.dtbo“ files which can be used for the Q2Ms too, and so somebody have to/could try to use them/modify to take the full advantages (and higher sampling-rates) out of these ES9028Q2M/ES9018K2M-chips..
any experiences/results->please leave a comment here..
got yesterday my STM32F103C8T6 (earlier post)->diy-stm32f103c8t6-blue-pill-oled-tft-display/
1,55€ (inkl.shipping)->Aliexpress -> Link
first->its smaller than i expected (see 2.picture) and its very „friggling“..
i thought, no problem, i use my Pi, wire it up like in some Youtube-Videos, use the Arduino IDE and begin to upload a sketch etc..
but:„Wasn´t“ ; )..got always a „STM32flash -> „Device init failed„
(use btw. first my USB-serial adapter with RX,TX and ground->Arduino said:“Device not recognized“)..
googled through a thousand STM32-Arduino-forum/threads, millions of hours, and the final conclusion is:
Buy a ST-Link V2 !! -> 1,68€ Aliexpress -> Link
directly from the beginning (with a STM32F103C8T6)->strongly adviced/recommended from my side here too !! 😉
(hope this will do the trick !! (toi,toi,toi->german phrase)) 😉
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..
according to their marketing, the M8A with one ES9028Q2M and a XMOS XU208 inside, is, as per their description, absolute DSD512/768khz-capable:
they say its primarily „solved“ by their custom-made/specialized XMOS XU208-firmware..
so if someone gets a hand on this firmware, rewrite it a little bit, everybody with a XMOS XU208-USB-bridge could eventually benefit from this and everyone with such a USB-Bridge could get DSD512/768khz..(with an ES9028Q2M).
but i guess we have to wait for that/its just only an idea 😉
DAC:ES9028Q2M DAC chip
Output: RCA analog output
Dynamic range: 125dB
THD + N: <0.0003%
USB: DSD: 2.8224/5.6448/11.2896/22.5792 MHz
USB: PCM: 44.1/48/88.2/96/176.4/192/352.8/384/705.6/768 KHz
„M8A as upgrade version of M8Hardware upgrade:Using the 2nd gerneration of XMOS USB audio solution XCore200 Xu208.DAC chip using ES9028Q2M.Upgrade for sampling rate:upgrade from 384kHz DSD128 to 768kHz DSD512.Driver is exclusively customized and support native DSD,which is very advanced in audio range.“
here another XMOS-XU208-USB-Bridge (this time with 4 built-in LEDs->power and sample-frequency):
Taobao 168Yuan+10Yuan shipping worldwide=22,68€=27$>
„4.SkySong XU208 support sampling frequency display f0 f1 f2 f3 dsd-pcm can display different sampling frequency (and other with the same paragraph pcm dsd instructions compared with our with a sampling instruction)
(4. SkySong XU208 Unterstützung Abtastfrequenz Anzeige f0 f1 f2 f3 dsd-pcm kann verschiedene Abtastfrequenz anzeigen (und andere Modelle mit der gleichen pcm dsd-Anzeige mit Probenahme-Anweisungen))
7.SkySong XU208 support external 5V dc power supply
(7. SkySong XU208 unterstützt externe 5V DC Stromversorgung“)