in visiting this great,great, diyaudio.com-forum (as said a million times before and link also in the „sidebar“)->https://www.diyaudio.com/forums/digital-line-level/314935-es9038q2m-board-338.html we have now here first a new „Dual ES9038Q2M-DAC/board„; it has also „a lot of shit“ as a bluetooth-receiver and such on board, but has also an HDMI-I2S-input, see post before..(the board itself is also from „SMP CB“ (like „our“ green-ones))
by that, and thats most important, someone over at the diyaudio.com-forum „DID IT“ 😉 , means software-control on some internal register, HW-Vol, DPLL-settings and so on / unbelievable !!..
i dont want to write here too much about it (NDA and such), just head over to the forum->https://www.diyaudio.com/forums/digital-line-level/314935-es9038q2m-board-338.html and u will be absolutely fascinated !!
also i found just now by chance a github-repository for a driver/.dtbo for the AK-4137 on a ES9028Q2M (hifibunny-driver) or ES9038Q2M->also just discussed in the forum..->Github/TuziUsagi->https://github.com/TuziUsagi/ak4137
more to come, merry christmas and many greets for now !! 😉
in waiting/looking for a toroidal 15V-0-15V transformer and the right case and thinking about the „maximum“ 😉 DIY-DAC + connections i came back again to some HDMI I2S LVDS to I2S-connections/modules..
Audiophonics has some there (25€+shipping)->https://www.audiophonics.fr/en/diy-interfaces/hdmi-i2s-lvds-to-i2s-input-module-hdmi-i2s-lvds-to-i2s-output-p-12422.html (u can get the same here for 21$ without shipping (costs)->https://www.ebay.com/itm/New-HDMI-to-IIS-I2S-Receiver-Board-Conversion-Board-Module-With-I2S-Switching-/332651861540
interesting by this „Audiophonics“-module is the selectable dual-I2S-input option->
(u can get single „ones“ here for 15$->https://www.audiophonics.fr/en/diy-interfaces/interface-module-hdmi-lvds-input-to-i2s-p-12683.html?search_query=hdmi%20i2s&fast_search=fs)
meanwhile i think u have to include such a „I2S-HDMI“-option because we got more and more USB-bridges with I2S-HDMI-out like the Gustard U-16 (see some earlier posts, LINK ) or some Singxer SU-1 for example..
Audio-GD also made equipment with this connection and interesting would be if it has great benefits in modding a „transporter“ means CD/DVD-Audio/Bluray-player and so on to bypass the spdif-connection/conversion and directly connect the transporters internal I2S-connection to an I2S-HDMI output module like this:(Link)
by that it is recommend only to use (hdmi-)cable shorter than 50cm->“..which needs to be kept as short as possible to uphold decent signal integrity“..
Kitsune for example has some there also by only 30cm (as example)(9,90$)->LINK
by that, i´ve faced some incompatilibity issues with the XMOS-USB-driver V4.45 (on my Skysong (Singxer)-USB-bridge) since the last Win10-updates (stuttering); reverted back to V4.36 (but still not „optimal“)..(link to the driver in the forum->Forum)
also i´ve got some new (Geekcreit Doit.am Devkit V1-36pin) ESP32 from banggood (to have a spare)->Link
it looks a little bit different and i also think there´s a „fresher“ Wroom32-module on it (newer revision)..
more to come, greets for now 😉
after i´ve re-checked my Op-Amp-„collection“ 😉 (in testing them on an ES9038Q2M) and reading a lot of op-amp reviews again, i´ve ordered a few days ago some AD797BR(Z) (as described in some posts before)..
The „B„-line has a stricter factory-selection/-fabrication and is mainly considered as the best AD797 for audio..
by that, curiously, i got the most the site-/page-visits here op-amp-wise, means the main interest is also in the op-amp-section/part/reviews..
so i can/will hopefully test them in a few weeks and the next step (op-amp-wise) would be the „Burson V5/-6″-line..
was also clear, as said in the earliest posts..but they cost around 40-50$ (pair)..
(the third set of pictures here are some Burson V5 on an ES9038Pro->https://hallmanlabs.com/2018/01/04/pictures-of-es9038pro-dac-w-burson-audio-v5-opa-and-orange-amplifications-discrete-design/)
some good toroidal transformer (+-15V) cost also about 30-40$ (min.) and so i/u have to check out which will bring the best „tone/sound“-enhancement (or both of course)..
(Link-Aliexpress or from Audiophonics or something)
„Webcontrol“-ESP32-wise its still in development but primary i think i want now to search for the right case, transformer..
many greets from here for now 😉
(some pics of pc/-hifigear with Burson´s + also a pic from a Gustard H-10 with V6s)
found by chance this new ESS-Baby 😉 in searching for new driver on shenzhenaudio..
Gustard U-16 (ES8620) !!
->“Adopting the latest USB audio interface solution ES8620 from ESS, USA
Supports up to PCM 32bit/768KHz and DSD512, and supports both DoP and Native DSD.
ESS’s USB interface chip design is a completely optimized architecture for high-quality digital audio signal processing. It is not a general-purpose chip with USB digital audio interface code, so it has immediate impact on sound quality improvement;“
„…128MB SDRAM is used as the system buffer and digital audio processing FIFO..“
„..the machine uses up to three FPGAs to implement USB audio interface clock management and external 10M clock part of the audio clock frequency synthesizer..“
first (interesting) review i found is here->https://www.dastereo.ru/t/gustard-u16-debyutnyj-konverter-na-es8620-xmos-amanero-upali-otzhalis/28117
didnt find any real opinions/soundtests against the other ES-chips till now (Update: and i guess i won´t find any at all because it is (unfortunately) only a „usb-bridge“ (more or less)->“High performance usb digital audio interface“ 😉 )
more to come, greets !! 😉
nothing particular new; „audio“-wise its a little bit on „hold“ (had first to buy some +-15V toroidal transformer and so on) but i made a little progress/effort „usability-wise“..
i´m now able to get something in the spiffs-fs (ESP32), read it out 😉 and display it via „drawJpeg“ from the famous Bodmer TFT-eSPI-library->Link
(!! sorry for the still absolutely „shitty“ layout, but i was only happy to get something on the display at all 😉 !! (will change/edit it then; only some „ideas“ (for not doing it in this way 😉 ) for u maybe)
was a little bit difficult because u (i) really need the absolutely newest libraries (jpegdecoder.h for example too) from the bodmer-github-repository (some older example jpgs are unreadable by their own decoder-library and so on..)..
have still some problems/the first third of a decoded jpeg is corrupt, but i can now upload some jpegs in the spiffs, list and display them..(and understood how)
the whole sketch (web-gui for filter-selection, HW-volume control via digi-poti, display jpgs etc..) is here->Link and i maybe make a post in the forum->Link..(could be very interesting for some who also want to understand the ESP32 „better“)..
by that it was all build on top of the absolutely fabulous „Autoconnect-library“ by Hieromon -> https://github.com/Hieromon/AutoConnect; absolutely super great webserver/wlan access library->absolutely to recommend !!
Picoreplayer is now at V4.1.0 (24.Nov 2018)->https://www.picoreplayer.org/main_downloads.shtml(Pi-Kernel-bump to 4.14.81, squeezelite-update, support for Rpi 3B+ and so on->Link
Dietpi is now also at V6.18 (26/11/18)(some bugfixes+improvements)->https://github.com/Fourdee/DietPi/blob/master/CHANGELOG.txt
that was it for now, more to come, stay tuned, greets 😉
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
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 !! 😉