PROJECT IV: PART 3 / Dual DC +-15 / LibreELEC / Toroidal T.+ LM317/337

so, 😉

as said, burnt my Philips BDP9500-powerboard with these fabulous dual DC (+-12V) ->(see post before) but i didn´t give up 😉 and so i tried another way to get my wonderful dual DC 😉 ..

okay, as i have now only straight/normal +12V DC (via another line on the powerboard (have still of course the toroidal Dual AC (18V1 + 18V2, more later)) i thought why don´t buy a single DC to Dual DC-converter !! ? (found it by chance,  didn´t knew its possible)-> 5,50€ Aliexpress-> https://de.aliexpress.com/item/32924044001.html

and so i could test-out again the „benefits“ from dual DC..

okay, the dc-dc converter runs a little bit hot (had to screw the poti a little bit up (from 12V to +- 15V)(use a little 5V-fan to cool it) but again, such a nice sound/tune from dual DC (absolutely better channel separation etc., see also post before) (and now with the, for me missing, „push“ from the +-15V instead of +-12V before !!) + and this time i used „LibreELEC„->https://libreelec.tv 

because i´ve got the Rasberry Pi Zero 2 earlier, (and wanted to check the usability as a media-center with only 512MB Ram from the Zero 2) and voilá also a nice sound via Pi 4->Skysong XMOS-USB-bridge->I2S->ES9038Q2M; really a little bit „airier“ maybe better as with „Volumio“ for example (but also a little bit more „distorted“, have to evaluate it more), but absolutely nice, these better dual DC-sound 😉 ..

and because i´m an absolutely dummy/noob concerning electronical things like these whole dual AC/DC.-thing (but made these site also for people with no knowledge in these things 😉 , to learn about it) i also found out by connecting the toroidal 18V1/18V2 to a simple dual AC to dual DC-converter (see post before) that i got a massive voltage drop under load (means: set to +-15V out, dropped under load extremly about 4-5V (to 11V for example), had not such a drop with the single DC-rail/line, discussed it with some friends and yes, absolutely clear, u need some capacitor to „buffer“, like with these ->“regulated LM317 + LM337 power supply board AC-DC“ with some 35V/2200uF capacitors for example ! 😉 (as said, totally clear for some electronical-hifi-freaks but not for me till this point); there are a lot of them around, also with greater capacitors, but just to learn about)..this thing cost about 9€ ->https://de.aliexpress.com/item/32570124466.html

(Voltage input-range: Dual AC28V (three lines), Voltage output-range: ±DC1. 25 V to 30 V adjustable.)

good 😉 ,

so, and now we´ve learned:

you have to use/need a regulated power-board behind some toroidal transformer !! 😉 (and some „thermistor“ before, another time..)

more to come + greets for now 😉

Raspberry Pi Zero 2 W / ESP32-S2 (ESP12K) / Skysong ES9038Q2M

so, 😉

as i unfortunately „burnt“ my green SMPCB 1.07 + the power-board from the BDP9500 (schniff ;-( , had not fixed the +12V-0V–12V cables correctly, only „so half-way“ 😉 , moved the sabre-board a little bit and voila: a nice grey cloud lifted up here above the power-board 😉 ) (but i ordered a new one (ES9038Q2M), see at the bottom), i´ve meanwhile recognized the arrival from the new Raspberry Pi Zero 2..

has 4 cores @ 1GHZ (instead of 1 core before) (same amount (512MB) ram), some newer Bluetooth (4.2) BLE and cost about 19$->https://buyzero.de/products/raspberry-pi-zero-2-w (u can read a lot about it in the web->https://www.raspberrypi.com/products/raspberry-pi-zero-2-w/ )

(i still thought to use it as „control“ for the LCD1602-display, the relais for the inputs (coax+tos) + „webcontrolled“ (see other projects before), but i guess the „boot-times“ for the Pi Zero 2 (also for Micro-Python btw.) are too long, so i guess i stick back with the ESP32 but this time i think i use „micro-python“ because u can use the same „sketches“/python-scripts on the both platforms (its easier + more interesting for me at present (super easy to flash and work with micro-python on the ESP32 btw.))..

and so i found a newer revision of the ESP32; the ESP32-S2 (ESP-12K)..it has only one but newer core, a little less ram, without bluetooth (was either way too resources-hungry) + has a better usb-support etc..cost only about 5€; is here->https://de.aliexpress.com/item/1005001489650877.html

so, and as i either way „burnt“ an „old“ SMPCB 1.07, i thought this time i buy a

„Skysong“ ES9038Q2M with display and poti; 45€ from here->https://de.aliexpress.com/item/32979155509.html

(i wrote about this particular ES9038Q2M-board already here-> http://essabre-90xx-rpi.sfb2.com/?p=2211)

and i think/thought that as they made such a phenomenal XMOS-USB-bridge („..best xmos-implementation..“)->http://essabre-90xx-rpi.sfb2.com/?p=1040

it could be really an upgrade to the SMPCB 1.07(will report more then about it)..by that these ES9038Q2M-board is DSD512-compatible (didn´t read it somewhere else) + special japanese condensators + u can also use some Apple TV remote (3€) to select the input-channel (I2S,coax,tos) + volume adjustment + select digital filter..

by that, a new „Moodeaudio“ is out (7.6)->https://moodeaudio.org/

nothing else new from here, guess i want to buy a new (spare-part) Philips BDP-9500 power-board (for the dual 12V) and will maybe post a python-script for the web-controlled/IR-receiver/LCD1602 for the „ES9038Q2M-Box“ in future..

but greets from here and have a nice pre-christmas-time ! 😉

SFB2

PROJECT IV: PART 2 / fast update / benefits from Dual (+12V-0–12V) DC

so, 😉

fast update: as my original plan (using the massive Cyrus-PSX-talema transformer (see posts before) + some AC-DC rectifier for dual-DC)) is now suddenly „obsolete“ cause i´ve got no voltage output at the end of the chain (don´t know why at present) i used the power supply for the video-section (+12V-0V–12V) from the BDP9500 and my green ES9038Q2M for finally dual DC power supply..and first impressions ?

1.for the dual DC-thing: absolutely more exact left/right->absolutely better „channel separation“ higher S/N i guess too, more „lively“..i knew and read a lot about it, and indeed, it has a great impact of the output (want not to go back to single DC) +

2.the high-class power-supply chain (from the BDP9500): absolutely lower „noise-floor“; everything more „lively/airier“, absolutely higher S/N-ratio (is absolutely clear->if u remove the background-noise, everything will get more in the „foreground“ and is more clear + lively)..

i miss a little bit the „attack“ which i got more, the more voltage i put in (IMO) and as said, the manufacturer says „..dual 15V (+15V-0V–15V)“ and have now only 12V; will look for a way to solve this..

another result from this 2 „optimizations“ is an absolute greater „presence“ in the mids/vocals (here on Mission-speaker)..by that i´ve got the feel that i have to put the volume on the amplifier a little bit „up“, to get to the „sweet spot“->guess a good alternative could also be to reduce the DAC-volume via the onboard/onchip-volume-control via some poti to 90%-95% (and turn the amplifier up)->had this first checked with the ES9028Q2M some years ago 😉 -> http://essabre-90xx-rpi.sfb2.com/?p=440 and the result was fine..(the disadvantage is maybe a little bit worser SQ (because of the „altering“); have „to balance/check“ it out) 

Conclusion: with these 2 „optimizations“ you get some really interesting new ways/turns concerning the sound/character !! have now to adopt it in further testing out; dual DC + high quality power supply (+less EMI-noise +such)->to recommend !! 😉

greets for now (+ more to come) !! 😉

Project IV: Part 1 / Philips BDP9500-case + ES9028/38Q2M + USB-bridge + Pi4 + stuff

so, 😉

as i´ve got today an old Philips BDP9500 (couldn´t read any discs („no disc“) anymore, cheap, Ebay, 18€ !! (incl.shipping)) + also this Dual AC to DC rectifier->http://essabre-90xx-rpi.sfb2.com/?p=2708 i can finally start/begin with some „example“-tutorial how to build your own DIY-DAC !! (main „goal“ on this essabre-site 😉 )

it´s only an example/showcase how to eventually do it..(a little story to begin with now):

okay, as this BDP9500 is trés chic 😉 (a really nice „blue“-light at the bottom) + massive, brushed, aluminium case and has this separated, dual power supply (one via some toroidal with 18V1 + 18V2 for audio) and one „power-line“ with +12V-0–12V for the video section (+ also with some +5V/GND-lines)(i knew this „hifi-high-end-build-up“ from the BDP9700 „Fidelio“(599€)->http://essabre-90xx-rpi.sfb2.com/?p=2576 and thats why i bought this BDP9500), we have now to find a way how to fit the other parts in it (the ES9028/38Q2M-board, the ESP32, AK4113,LCD1602 + oled-display (maybe a Pi 4), usb-bridge etc..)

it is really a long story/tutorial (cause i wanted to post the circuit diagramms from the Parts of the BDP9500 too etc..), a lot to do, and so i will post also a lot of steps (parts(ideas) „in between“)..

Part 1 (today):

as i´m relatively „unsure“ if this +12V-0–12V works (from the second power-supply), i will use an old ES9028Q2M (want not to „destroy“ some new ES9038Q2M) ->…

more to come …!! 😉

Panasonic DMP BDT 385 / playing finally .dsf/.dff-files / Toroidal transformer – Talema (Cyrus PSX) 27,9V

so, 😉

got today finally a Panasonic DMP BDT 385 (got it cheap from Ebay, 17€, faulty, couldn´t recognize a bluray-disc anymore) to test the DSD-functionality + to compare it with my other Sony + Philips Blurayplayer here..

very nice, detect and play any .dsf/.dff-files which i have on my usb-drive..the Sony only detects Sony-„tagged“ .dsfs and the Philips only Philips .dffs 😉 ; the pansonic plays them all + also other „non-tagged“-DSD-files->stupid..

by that, the „quantizing-noise“ (and i think thats mainly the „white noise“) is absolutely more less via my hdmi-extraction-board + ES9038Q2M-combo here then via the Sony for example; have to test + evaluate it more..(its still an I2S-connection problem i guess->soldering)

DSD-files are btw. outputted at 88.2/24 via toslink (besides over HDMI of course)->

picture-quality + handling-/usability-wise its a lot more „basic“ then with the Sony BDP-7200 for example..thought first why Panasonic have such a good reputation, i felt it too „basic“, but in the end its okay (but its really about your personal taste and overall the Sony is better (for my taste)).

by that i got by chance a really, really, massive (guess 5kg !! or so) Talema toroidal-transformer 220V/2*27,9V..was originally from a Mission Cyrus PSX only power supply expansion (posted a lot of  it before)-> heavy bummer !! 😉

wanted originally some 15V-0-15V toroidal for the chinese ES9038Q2M but will use it as power supply for the DAC and for the rest of things in our „DIY-DAC“ !! (esp32s,arduino-display,usb-bridge,AK4113-digital to i2s receiver etc..)

will post a lot more about it, cause that was the „main goal“ with this site->ourDIY-DAC !!“ 😉

greets or now + much more to come !! 😉

Got today the AK4113 digital receiver to I2S-output/ still at 96khz/24bit..

so, 😉

got today this little „gem“, the mentioned AK4113 Digital Receiver Board + LCD1602 Screen SPDIF Optical/Coaxial/I2S To I2S Converter“(LINK)

thought first i have to solder the pinheader for the LCD1602 by myself; but it was already soldered->

„powered“ it by a simple usb to 5V „converter“ but all i got at the end was 96khz/24bit via the hdmi-audio-extractor and also via the coax/toslink-output of the Sony BDP-S7200 and the Philips BDP9700/12->

tried all different settings in the system-menus from the both player (auto,bitstream,pcm etc.,etc.)->no success..also via the hdmi-extractor the max was 96/24..

but don´t know if the AK4113 detects (and displays) it accordingly; but the 3 manual settings on the extractor were „pass“,“2ch stereo“ and „5.1“..with the „pass“ and „2ch stereo“ i got only 48/24 max..has to „evaluate“ it more..

UPDATE 1: seems like these special 4k-hdmi-switch/audio-extractor only supports audio up to 96/24..so, be careful in choosing the right one !!

another thing was that i wanted originally connect the AK4113 via I2S (to bypass the spdif-conversion) to an ES9038Q2M, but absolutely no „lock“-light..thought about it a lot and i guess (at the moment) the I2S-line (-cables) are too long (ca.30cm)..(read it sometimes ago->“the i2s-line(-cables) has to be short as possible (5-10cm)..“

UPDATE 2: curiously, i´ve got the „lock“-light (and its playing) with the „blue“ ES9038Q2M; so, again, there is often a compability-problem with different devices..

greets for now + much more to come.. 😉

(eventually) „Lock“-problems (coaxial/optical)-line on ES9038Q2M-boards..

so folks 😉 ,

as slighty feared, i´ve got a new hdmi-switch with an audio-extractor-function (also for DSD) (19€/Aliexpress)->

but got „massive“ lock-problems, means its „stuttering“ over the coaxial and optical line on our ES9038Q2M-boards (the „lock“-LED is constantly „working/blinking“); no constantly bitstream..(had it also often, when the soldering on pi-boards/es9038q2m i2s-line was not so optimal)..

checked the coax-cable, used toslink too: same problem..

thought first the switch couldnt deliver a constantly bitstream but connected it then to our mini-dac (Ünnlink 192Khz Digital to Analog Audio Converter  (http://essabre-90xx-rpi.sfb2.com/?p=2384)) and voilá, no stuttering/problems anymore..

okay, but i had not such lock-problems with my Sony CD-changer, nor Blurayplayer, nor Telekom-Mediareceiver over coax/toslink..

so it seems its only on some audio-devices (spdif transmitter/receiver-chips problems/incompatible) and as we had it here in discussion a thousand times (->“.. and as we know „our“ early chinese ES9038Q2M-boards had not such a good „coax/toslink/spdif-line“ (the first onboard spdif-receiver-chips were not soo good (hashtag #SRC4192/AK4113/4118) ->http://essabre-90xx-rpi.sfb2.com/?p=2211 ->“..First, on the new, blue SMPCB they use some „DS9281“ for „better coaxial conversion, less jitter, less „lock“-„problems, „better coaxial line..“),

i/we have to make/find a workaround and for this i´ve found this little nice gem->

AK4113 Digital Receiver Board + LCD1602 Screen SPDIF Optical/Coaxial/I2S To I2S„, 25$ Ebay/->LINK

has a lot of other advantages too !! first, we got finally our „digital format/sampling frequency/digits“-display !! got besides the 2 spdif-lines also an I2S-in (will be passed through) to whom we can connect for example another hdmi-extractor (link/description at the bottom) and can easily switch between the input-channels via some simple button switch and have in any case some beautiful digital-format/sample-rate display !! 

by that it uses the AK4113 which should result in less jitter etc. too..

so, great (i´m waiting for it now) and yet to the last point today, these „Digital Interface Board HDMI / MHL to I2S / Coaxial / Optical“-device;->

had it mentioned in some articles before and because its above the 26€ duty-edge, i thought to buy it from https://audiophonics.fr/en -> https://www.audiophonics.fr/en/diy-interfaces/digital-interface-board-hdmi-mhl-to-i2s-coaxial-optical-p-15388.html ;

it cost „double the price“ (same device) 50€, but its in the EU; faster shipping times + no duty problems..(and there are a lot (all) other nice things u need to have (i2s-cable,XH 2.54mm Male Socket 5 Channels connector,  toroidal-transformer, cases, all u wish)

greets for now + more to come !! 😉

Task: with a cheap bluray/SACD-player over hdmi to I2S->ES9038Q2M

so, in short: 😉

idea is to buy a cheap bluray-player (Sony BDPS570 for example) with SACD-capability and then sending the DSD-information over hdmi to a hdmi -> I2S converter and then via I2S to an ES9038Q2M for example..(btw. absolutely „common practice“ in the „hi-fi“-world).

we had such a hdmi-i2s-converter-discussion some time ago->http://essabre-90xx-rpi.sfb2.com/?s=hdmi..->

(and beware: there are lot of different hdmi->I2S sender/receiver-boards: ones are only for transmitting the I2S-signal between them and the other „extract“ the audio-signals/I2S from the HDMI-stream ! (had made a new category“->“HDMI to I2S“; will explain it in a later post)

there are also complete „solutions“ for that, and also i´ve read just now that u can burn your own SACDs with Nero for example..

(50$/37$ Aliexpress->https://de.aliexpress.com/item/1005001265826217.html ; https://de.aliexpress.com/item/33031920347.html )

i´m in the „gathering-information“ state 😉 right now , will post then more about it,

greets for now 😉

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