..some beautiful wiring pictures from some ES9028Q2M+/-38Q2M from a post/thread by „Terry“ at the forum (hope i can use the pictures here)->
+ some interesting measurements…
after „Kennyliveforever“ made a great post about porting/including the I-Sabre-K2M-driver in Volumio->http://essabre-90xx-rpi.sfb2.com/forum/showthread.php?tid=64, i´ve re-checked this driver-option in Dietpi (v6.6) again..
a few months ago i tried everything to get this driver in Dietpi (earlier versions) to work and there was/i heard absolutely nothing..
Now with the new DietPi (v6.4 and up) there was/must be a change in installing the driver..after you change the soundcard in rpi-config to „i-sabre-k2m“ there „comes“ a rpi-update and after that it loads some software from codeload.github.com, install some compiler-binaries and after that it compiles a complete new .dtbo (overlay) and includes it automatically afterwards..
some month ago, as said, these steps were absolutely not proceeded..
and now we have our lovely „384khz“ back !!!
(i really don´t know why this is not clearly communicated via „fourdee“ at dietpi..)
anyway, i started this whole blog/site by/of this problematic and alone for this, this blog has been paid off !! 😉
okay, i had only a few minutes to test it, but i think with this ess-driver which uses (i hope) and demands the special capabilities of the ES9028Q2M i have a here a really better sound (about 10-20% min., i „surmise“); it comes now really up to my best combo at present->ES9038Q2M with Muses8920+Skysong-USB-bridge !!
but, and this is very important too: i strongly recommend to upgrade your ES9028Q2M to „Muses8920“ too !!
(they cost only about 3,50$ from this seller by example (and they are not „fakes“, guess so 😉 )->https://www.ebay.de/itm/362255966842?ViewItem=&item=362255966842)
(i will test if this i-sabre-k2m driver also works with the ES9038Q2M..)
got yesterday my „OPA2134“ and had finally the time to check it out 😉
okay, fired up my Raspberry with the ES9028Q2M and thought first:“ ? why sound it so „distorted“ ?“ (my main „rig“ is at present->Skysong/Singxer USB-bridge (golden Crystek CCHD957s) + unmodified ES9038Q2M (Blue)..
Changed then the NE5532 to the OPA2134 and the result ?
Surprisingly good !! 😉
bought a few month ago some OPA2604; they were really, really, really bad (in any case on these Sabre-boards)..
This OPA2134 is very lively, airy, is more about middle-highs and really less „distorted“..
you can use them without any problems/thoughts to upgrade your NE5332..!
by that it brings me some „glance“ back (in the highs) which i missed since 5 or 6 years ago, as i had to change my lovely Via VT1828S (onboard) to an „ordinary“ Asus Xonar DX..;-)
changed then to the „Muses 8920“ and ? Better 😉 ..it has the best from both op-amps: this airly, lively (OPA2134) but also the „push“ (NE5532) mainly in the middle-lows..;-)(„its all about the slew-rate“ 😉 ; funny+interesting article here->http://nwavguy.blogspot.de/2011/08/op-amp-measurements.html )
anyway this OPA2134 is as said very good..
the next possibility would be an „AD797“ or some LMEs..(and Burson V5 of course)
ES Sabre itself recommend these „AD797″ + some LMEs (for the ES9006+ES9008 series)..its from a very interesting download->“Maximizing DAC performance…“->http://www.esstech.com/index.php/en/support/downloads (thx to „Mark04“ again, over at the DIY-audio-forum->LINK)
so, and another thing is that i´ve updated to Diet 6.5 and with every version it sounds better and better and the main advantage is that u have meanwhile almost no horrible „pops“ in changing the music-file-format like flac to wav or 44,1 to 192khz for example..
i guess its also because u got a better/fresher raspian-(firmware) everytime u update it via DietPi..
greets for now..
sorry, i´ve just seen that it was impossible for unregistered user/guests to see any content in the forum->forget to uncheck „Force Guests to register/login to access the full content„(it was, as i hardly remember, because of the f***** spam-attacks); its solved now..->FORUM
second i´ve made a new post how to change the „identifier/baudrate/pin“ of a HC-06-BT-module->http://essabre-90xx-rpi.sfb2.com/forum/showthread.php?tid=34
third i´ve updated to „DietPi 6.4„->http://dietpi.com/ and it plays here soo very well with my „ES9028Q2M“->absolute wonderful..(just connected 2 DIP-buttons via a breadboard to the 8 pin HW-control on it..); soo nice..(i will also try in future to solve/control it via some BT/Arduino-control)
fourth i´ve installed/set up a „search„-widget in the upper right..thought it was already there but wasn´t 😉
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..
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.“