The OPA627AU arrived – very „warm“- not so much „digital-room/-soundstage“/ Volumio now at V2.502 / dimdim.gr

so 😉 ,
finally the OPA627AU (as dual on one DIP-8) arrived..
and indeed, absolutely more „analogue/tube-sound“ (in comparison to the AD797ANZ + LME47910-20s) here..
very „warm“, but with a lot of „body“, more „natural“, not so digitally „harsh“ as the AD797ANZ (or the LME47910 of course) by example..


better for high-volumes->thought first „more right/true“->more hi-fi..(but also maybe a little bit „fatiguing/boring“ due to the analogue „timbre“)
not so much „digitally room/3D“ what i liked the most on the ES Sabre-Chips; very „sweet“..
The OPA627AU and the AD797ANZ are absolutely on a very similar „level“; u absolutely doesnt go wrong in using the OPA627AU..
but for me, i think i stuck with the AD797ANZ; more „room/clinical“, but thats really an absolutely personal impression/affection/taste..)
i think the speciality on these Sabre-Chips is this digitally room/3D-feeling + also with the great soundstage..
so i stay, as said, with the AD797ANZ (all on this „Blue“ ES9038Q2M; the „Green“ have a slightly different characteristic as mentioned in an earlier post..)
(Update 2hrs later: i will definitively stuck with the AD797ANZ; for me absolutely the better choice !!)

by that Volumio is now at V2.502, some minor bugfixes + Pi Kernel-bump to 4.14.71; couldnt determine any differences in the overall tune..


by that i want to suggest/introduce you to http://www.dimdim.gr again..
absolutely great site; inventor of the famous „Hifiduino-project“; a lot of very interesting infos/tips there; take a look over there !!


more to come !! 😉

ESP32S + 3.5″ TFT-display (480×320) (par.) ILI9481 Bodmer/TFT_eSPI

yeah, 😉
got it finally to work !!
so, another important step in the way of (building) your own DIY-DAC !! hooray !! (and thats what this site is all about, see „Introduction“) 😉
(YouTube-link->https://youtu.be/zjiCJ8Jtsug)
so II,
after the ESP32S is a much more powerful thing than an Arduino (the main advantage is also the great SPiffs/Flash-Ram of about 4MB(32Mb) for storing little images/icons like DSD64 and so on) and its a little bit difficult to get normal tft-displays on an ESP32S to work (different pin-layout and so on),i´ve bought this second tft (this time 3.5″) and only for ca. 6€->Ebay (Link)


main problem on these „cheap“ 3.5″ is that some must be parallel connected (and not via SPI) so u have to find a way to solve this..
i´ve used the famous „Bodmer/TFT_eSPI“-library (works for some displays in parallel mode + on an ESP32)->https://github.com/Bodmer/TFT_eSPI
u only have to change some values in the „User_Setup.h“ + „User_Setup_Select.h“ to match your needs->other pin-definitions + the right tft-driver-selection (post maybe a link to these 2 files here or in the forum)..
here it works fine with the „ILI9481“-tft-chipset:

so III,
i can now use the ESP32S for the HW-digi-poti, for the filter-settings and so on, all with a very nice gui via wlan..(or bluetooth or via mqtt with an app par example (see all the posts before))..very nice 😉

greets for now 😉

HW-Volume pinlayout – ES9038Q2M + OPA627AU/AD827

so, (another one today) 😉
found by chance a picture of the pin-assignment for the HW-Volume-control on an ES9038Q2M (its from the Audiophonics-site->Link..)(„we“ knew it, but so its much „clearer“) 

by that there´s also a wonderful picture from an combined Raspi/ES9038Q2M (its from the diyaudio-forum; hope i can use it here, if not, please e-mail)->Link

(i´m lately thinking also about to include some raspi directly in such a DAC too, because (as said and also in testing here) on a raspi (over I2S) u have an absolutely superior sound comparing to any XMOS-USB-device (over PC by example)->see this post too->http://essabre-90xx-rpi.sfb2.com/2018/05/moode-volumio-on-a-raspberry-pi-vs-samsung-bluray-player-spdif-coax-impressions-src4392-beta-project-2/ and whats all about this site too 😉 ..
third, on some japanese-yahoo-auction-site they also recommend/have the OPA627AU on it; but they use it only in the dual 15V „environment“, they recommend „strong +-15V“ 😉 ..in the case of a single rail 15V they recommend the AD827 (JN) (and they made a special layout for both cases)->https://page.auctions.yahoo.co.jp/jp/auction/q238163678

Op-Amp Diskurs: AD797A – AD797B / OPA627AU + other.. / DIY-Audio

so, 😉
after i´ve finally got the Green ES9038Q2M (see post before) i can continue to „develop/build“ the planned DIY-DAC (according to the main topic of this site->“Audio-introduction“->“..all in favor (in the way) of building „our“ own DIY-DAC !!“ 😉 ..)

and as i said, i´ve got the feel that the AD797ANZ (i had no other AD797 here) is absolutely the best choice on the „Blue“ ES9038Q2M (and from the Op-Amps i´ve got here so far of course) (LME47910,-20,OPA2134,Muses8920, etc..), on the Green they „sounded“ for me a little bit too thin(+harsh)..
guess (it is) because of the different pcb-layouts, other voltage regulators, capacitors and so on; wonderful thread concerning this as posted million times before->https://www.diyaudio.com/forums/digital-line-level/314935-es9038q2m-board-301.html
i´ve just ordered (as planned) some OPA627AU (they should be a little bit „warmer“, but also with the wide soundstage + 3D/spacious/“airy“ attitude) and hope they will fit my personal taste a little bit more (and this is exactly what it is in the high hifi-gear-equipment->from a certain level on its always/depends on your personal taste + affectations/preferences)..
so, by that, as some user said, the the AD797B is the optimimum choice for hi-fi by the AD797s i´ve found by chance a .pdf (datasheet) from original Analog-Devices->Link..



and indeed, the frame-specifications are almost the same but there are some differences..(picture is only a small excerpt)
some user said (also here in the forum->http://essabre-90xx-rpi.sfb2.com/forum/showthread.php?tid=76:
„..Category 5 – complete sound traveling in the clean air“
2x AD797BRZ – this is the op-amp truly deserving the name of the Analog Device. This one is a smoother and fuller sounding version of the AD797. Switching from the ANZ to the BRZ series is like going vinyl instead of digital. Everything is smooth to the moment your music craves for the harsh texture like aggressive violin passages, distorted guitars, or stronger double bass phrases. The readability of the furthest plans is great, without going into image sharpening effect which makes you see the details more but lose the feeling of perspective at the same time. Roughly, it’s like the AD79ANZ with all advantages of the OPA627BP added. The soundstage is nowhere limited and the sound image of whatever possible shape. This is a reference integrated op-amp for me so let me know as soon as you find better, and I will verify it.“
i will test it then, have to buy this AD797BRZ.. 😉 ..
another thing is that i now continue to find a case, look for the right torodial transformer (+15V-0–15V) and so on; Audiophonics has some there->https://www.audiophonics.fr/en/search?search_query=transformer+15v



by that, i´ve found some old „Harman Kardon HD710“ (for maybe using some parts/case of it) and interesting was also the „normal“ CD-Player LCD-displays which had „millions“ of different display-elements (maybe to get some other ideas for „layouting“ your own display)..


(but i will continue to post raspberry-things, audio-distros (software), ESP32-things and so on, no worry)
gr.. 😉

Finally the ES9038Q2M V1.07 „Green“ arrived / results compared to the „Blue“ one..

so, 😉
hooray 😉 , finally the Green ES9038Q2M V1.07 arrived (more Hi-Fi again 😉 )->

Impressions: used first the coax-input (Samsung BD-Player) ->absolutely massive !!, thought: more hi-fi again (as with the first ES9018K2M+ES9028Q2M, not soo with the „Blue“ ES9038Q2M..)
interesting is that the NE5532 is absolutely great on this „Green“ one; fabulous sound via spdif/coax+NE5532; goes really down and with good „push“..
changed first to the Muses8920 and then to 2*AD797; stick now with the ADs->more „room“, better THD, almost too thin for some i would say (in opposite in using them on the „Blue“ ones..).

would say a better performance (Green vs. Blue) by 5-10% 😉 (its also ca. 20% heavier („Green“) and the PCB is thicker; got the feel has a better „ground“, especially for the „lows“)..
other differences: the „Lock“-light on the „Green“ is more „torquise“ and is only lit in playing something over I2S (over coax its permanently)..“Blue“ Lock-light is red and permanently lit (at connect).

(if u have other questions, please leave a comment here->Link above)

many greets for now 😉

New Moode V4.3 out – now as an image (.img) / ESP32S factory-reset/flash

so, 😉
a new „Moode“ V4.3 is out; now as an image (.img); u dont have to set it up/compile it for yourself anymore->Moodeaudio.org
first impressions: (all in relation to „our“ ES9038Q2M-„chinese-boards“):

choose first the „I2S-generic“-settings; runs okay, no problems..

used then the „Audiophonics ES9028Q2M“ setting->for me better, not so „harsh“, got the feel it has more room, more „exact“, think its maybe about the specialized register-adressing of the ESS-chips (but don´t know for sure if they „fine-tune“ it for the chip, guess so)…used then to cross-check the „hifiberry-dac“ settings; the same there; for me absolutely to „harsh“, too much treble (not such a „fine resolution“ as the AudiophonicsES9028-setting..)
(the „Allo Katana“-setting (at contrary to Volumio) works also NOT !! (on the ES9038Q2M (chinese)))

stayed with the ES9028Q2M-setting, then tested for DSD(DoP): works, Moode said „Encoded to DoP 352.800khz“, but the DSD-Led on the ES9038Q2M was NOT lit !!

disabled the software-mixer, resampling-options, but still no DSD-light..

i´ve mentioned it in this post/article before-> http://essabre-90xx-rpi.sfb2.com/2018/09/volumio-now-at-v2-452-did-it-dsd-lock-light-on-es9038q2m-alsamixer-archphile-xmos-usb-audio-etc/

the first time i´ve got the feel of real DSD/DoP (and the DSD-Led was lit of course) was in/with „Volumio“; foobar2000 also said ASIO-active (pcm-mode) 352.800khz and so on, but the DSD-Led was also not lit !!

conclusion for now (for „our“ lovely chinese-ES9038Q2Ms 😉 ):

true/real DSD/DoP (DSD-Led lit) only on Volumio (V2.452 and up) (and meanwhile i think thats the point: with the „Allo Katana“-settings !!so far !!

by that, in listening here Moode is very very close to Volumio (maybe a little better at present IMO) (but as said, this is an absolutely personal/subjective impression).

also my ESP32S Geekcreit (Doit.am 36 pin) was not functional anymore, couldnt run/upload a sketch, tried everything, found now a way (and mainly with the right hex-adresses for the espressif-flashtool) to made it functional again->long Tut here (at the forum/at the end of the post)->LINK

greets for now 😉

New XMOS-USB audio driver (V4.47) / SMSL 8A V3 / Winbond W25Q64 (Qxx) Arduino/ESP32S SPIflash

so, 😉
there´s apparently a new XMOS-USB audio driver, V4.47 (Link) (08-06-2018) out; found it first by reading some reviews for the Sabaj DA3 (->https://www.audiocircle.com/index.php?PHPSESSID=ktk1k2hchrlfmloktc0k3c5og0&topic=152638.340 ) and yesterday at an Audiophonics-Ad concerning the new SMSL 8A V3->https://www.audiophonics.fr/en/dac-without-volume/smsl-m8a-v3-usb-dac-es9038q2m-32bit-768khz-dsd-xmos-xu208-p-12934.html and also directly at Theyscon->current release : V4.47..
by that there´s also a new V4.41 from Thesycon/Jlsounds->Link forum..)
also the new SMSL 8A V3 has a „2nd generation XU208“ (259€)->

by that i´ve bought some new „Winbond W25Q64“ (64Mbit/8MByte) SPI-„serial flash-memory“ (only 1,29$ par example->Aliexpress) to use it maybe on an Arduino to display some graphics on the TFT-display and because the Arduino by example has a very low ram-amount (32kB !!) i wanted to extend the memory to store some data for the bitmaps..

On an ESP32S its not soo critical (4MB); u can store the bitmaps in the SPIFFS-subsystem but anyway i didnt find a „SPI-flash“-library for the ESP32S and the Arduino in general !! searched thousand hours on google and yesterday i found per chance this SPI-flash/library/tools on „RinkyDinkElectronics“->Link, the same guy who made this beautiful UTFT-library !! and which i used before ! 😉 ->Library : SPIflash

connected and it runs fabulously 😉

and hooray !! 😉 , i´ve finally ordered an „ES9038Q2M“-„Green“ V1.07, (i have a „Blue“-one here) to check finally out if there´s a „shitty“ PCB/components-problem on the „Blue“ or if they sound the same..

by that, next OP-Amp will be the „OPA627„(AU)->“The Bugatti Veyron on the Op-Amps“ 😉

many greets and more to come !! 😉

 

 

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