Skysong ES9038Q2M / very handy..

so, 😉

finally (and last for this), the Skysong ES9038Q2M with display and voltage-poti arrived today (see post before)->http://essabre-90xx-rpi.sfb2.com/?p=2768 ->

meanwhile i can´t determine exactly the differences between the ES9038Q2Ms like this Skysong and some green SMPCB V1.07, cause they „sound“ almost exactly the same (maybe these Skysongs are a little bit more „warm“ and not so „crispy“ like the SMPCB-versions of it (its the same with the Skysong-XMOS-Bridge) , but can´t say this for absolutely sure..

anyway, a real improvement in sound/SQ on these boards is to use a dual-DC -power-supply chain (with +-15V !!) (also see posts before), i would tell it like so (and come to an end with these ES9038Q2M-chinese-boards) (but its very „speculative“, only some guess/feel by myself 😉 ):

  1. 100% -> SMPCB V1.07 (Green) with Dual-DC +-15V
  2. 98%    ->Skysong ES9038Q2M with Dual-DC +-15V
  3. 82%    ->both boards with Dual DC +-12V
  4. 72%    ->SMPCB V1.07 (Green) with single 12V/15V
  5. 70% 😉 ->Skysong ES9038Q2M with single 12V/15V
  6. 68%     -> „Blue“ ES9038Q2M with single 12V/15V

but as said, very „speculative“ 😉

by that these new Skysong ES9038Q2M with the display, volume-poti and possibility to „control“ it via some cheap (3$) Apple-TV-remote is very „handy“ usability-wise; very nice to adjust the volume on the board too (its a „hardware“-volume mixer (bit-wise)) and has very little impact on the sound-quality, almost nothing..(by that i can finally change the different filter-types „on the fly“, will maybe post a little bit more of it) as originally wanted here on the site..

so again, sorry about it, but i guess thats the final post concerning the differences on these ES9038Q2Ms, maybe we´ll get some ES9038 Pro in future 😉 ,

greets for now 😉

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 …!! 😉

some quick and dirty pics from the DIY-DAC / best sound via Pi4->SkysongXMOS-Bridge->ES9038Q2M (with Burson V5-D)

so, 😉

bought today again some little stuff for the main-goal here on the site->the own „DIY-DAC/network-streamer“ 😉 ..

decided to built it with a separate power supply/-unit (like for example these Mission-PSXs combos (have often posted about it)..(to eliminate any electronical interference/-noise)(the original „combos“ were only for cleaner/stronger „power“)->

and so, i have ordered some dual voltage AC/DC-converter (rectifier), because the manufacturer always say „..best results with a dual 15V-0-15V power source/supply“ (although the chip itself (ES9038Q2M) runs with 3,3V VCC max. (see this Datasheet ES9038Q2M (LINK))..(guess its about the LM78/9X „.fixed linear voltage regulator integrated circuits“ (i think they took the fixed 15V-version of it)..

anyway, separated today the transformer/power-supply for the ESP32s,oled-display,AK4113 digital receiver etc. to a separate case (in this case also the massive Cyrus-PSX toroidal-transformer (dual 27V) will find his housing))

(Ebay, AC/DC (max. 36V) to 5V-15V Dual Voltage Converter Board Mini Rectifier Power Supply Module, 6€ ->LINK )

and okay, as „i fired it up“ with the Pi4 + Volumio and my other XMOS-bridge (Leaf-audio), got problems in detecting it by the Pi, i used then these absolute wonderful Skysong-XMOS-bridge !! (posted also a lot of it before->http://essabre-90xx-rpi.sfb2.com/?p=1883 ) and got these beautiful tune/sound again !! (and its btw. only with these Skysong-bridge (the Leaf-audio (XMOS too) for example sounds lightyears worser)..

got „dynamic-wise“ about minimum 5db 😉 more „frequency-spectrum“ then with my Bluray-HDMI-I2S-extraction-combo (and thats almost the best/optimum combo for this transporter/hdmi/i2s things)..

absolutely fantastic !! (as said „the Pi is made for music“ + these wonderful „best XMOS-implementation“ Skysong-bridge !!) 

that was it for now, more to come, many greets and stay tuned !! 😉

HDMI to I2S (C1) receiver-board arrived / NE5532 vs. AD797 vs. OPA1612

so, 😉

finally today the „HDMI to I2S (RX-„C1“-PS-audio-standard) receiver-board arrived (LINK-Aliexpress, 14€))->works absolutely great/flawlessly with the hdmi to I2S-extraction-board (HDA20012 GLA V5 TX-„C1“)->

it works „so“, without extra 5V-power (the extraction-board delivers the 5V over HDMI (but u can „jumper“ it))..

„sound-wise“ its a little bit more „flat“/not so „brilliant“ in comparison to a direct I2S-connection (absolutely logical), but i guess so only about 2%-difference 😉 )..(and u have one I2S-solder-/“unstability-problem“ less !)

by that i´ve got an „OPA1612“ a week ago or so, and got now the time to test it out->

NE5532: a lot of body + push, absolutely good overall OP-Amp..(was originally in the „green“ SMBCP-ES9038Q2M-board (V1.07)

OPA1612: very clear, very dynamic, very „roomy“, more „body“ like the AD797, (but also a little bit „thin“ + less „character“)..(coriously today the best from the two (NE5532+AD797) the body/lows from NE5532 and the highs from the AD797)..(„quality-wise“ about 10-15% ahead of the NE5532.)

great OP-AMP !! (but maybe with a little less „character“)..

AD797ANZ: absolutely „creamy“ + sweet+ 3D-ish (almost „heavenly“ 😉 ), but with almost no body/lows..absolutely in the middle/highs and there some „own room/3D/space“, character..(but also a little bit „distorted“ in some way)

a lot of „character“, was my favourite OP-AMP so far..

still complicated (to find the right OP-Amp for yourself), right now/today i´m more „on character“.. (i tested a lot of OP-Amps, Bursons, Muses, LME´s,OPA´s (look right in the widget/categories->“OP-Amps„->http://essabre-90xx-rpi.sfb2.com/?cat=13)

(+ in these region/area of very good/high-end OP-Amps its really only about the „timbre/color“ of the sound (which u prefer)..the sound/tone/content itself still remains..)..

so, will change the OP-Amp back to the NE5532 to get my „test-setting“ back and to work again more „on the chain“ (transporter->hdmi->I2S) before..

(PS.: the OPA1612 is still playing here now; absolutely great, super quality + a great dynamic ! (should compare it again to the Burson or Muses or other OPA´s etc.,etc. for example, but not now) 😉 )

many greets for now + much 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 !! 😉

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