(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 😉

Usability / Volumio->BubbleUPnp / Volume-Potentiometer-Hardware-None

so, 😉

sorry for the lately uninteresting/not so “fresh” news about the ES9038Q2M/ES90xx-chips/boards etc..; maybe that will come back..

today, to keep this blog going, some usability-tricks/tips using a RPI-4B and volumio..->https://volumio.org/get-started/

runs fantastic (imo), is absolutely DSD-capable (remember to use an USB-bridge (XMOS or Anamero) “in-between” and set volumio on “DSD-direct”,”no mixer”, “no resampling”-> else u wouldn´t get the red/torquise DSD-lock-light on the ES9038Q2Ms..->

by that i´ve tried a lot of dlna-apps for volumio and best for me so far is->BubbleUPnP->LINK

there are millions of other (“Mediahouse etc.,etc.,”) but imo, BubbleUPnp correspondends superb with volumio..u can see in BubbleUPnP whats playing, can change the volume via the “normal” volume-keys and u can also play/send .mp4/.mkvs etc.  to volumio and it plays only the audio/tracks..great ! 😉

by that i´ve bought a 10kohm-poti again (wire-diagramm here->http://essabre-90xx-rpi.sfb2.com/?p=1660  ) and although we have a web-volumecontrol with a MCP4131 “here”->http://essabre-90xx-rpi.sfb2.com/?p=1306

i still thought its “usability-wise” better to use an old-school (analogue) poti but its still the same problem as first: u have only a very short range (i guess 35 degrees) from full to nothing and u have to turn it manually ;-)(but u are nearer on it 😉 )..still doesnt know the right conclusion for me, still in testing 😉 )..

greets for now and more to come !! 😉

again some new pics->DIY-DAC (ES9038Q2M) / 100.000 visitors..

so, 😉

because we have almost a 100.000 !! visitors here on the site (hooray, tomorrow i guess 😉 ), i post some additionally pics on the improvements of the DIY-DAC..

I´ve added some 0.96OLED (I2C) to display the data-format and rate (DSD/PCM-44.1k-384k DSD256 and so on); by that i use also 2 new LEDs (blue for DSD and red for PCM) to make the dac more shiny 😉 ..

problem was to get the information through the usb-bridge if it got DSD or PCM..will post then more about it..

unfortunately nothing “more” new about these “whole” ess sabre-things, maybe then more, greets for now !! 😉

(fifth picture is from a “Copland CSA100”->Quad Mono Sabre)

DIY-DAC: Telekom Media Receiver 303A as case/with 12V/3A power supply->as audio-streamer with Rpi4 + XMOS-USB-bridge + ESP32 as display-controller..

so, 😉

i´ve found a few days ago some “withdrawn from service” 😉 Telekom (uarghh ;-( )  Media Receiver 303A->was first interested in the internal HDD->500GB Seagate, but have seen then this has also a built-in 12V/3A power-supply and its from the dimensions almost ideally as some Raspberry Pi4-ES9038Q2M-audiostreamer !! (not soo big) 😉

Display-wise its a little bit limited (due to the available space (height)) in the front, but some LCD1602 will maybe do it fine..

found then an easy way to connect some to an ESP32 via I2C and via some “web-remotes” (see other posts here “Project-1” etc..) we can select via some photocoupler/relais the inputs of the ES9038Q2M (Coax,Toslink, I2S/USB), adjust the hardware-volume, filter-selection and so on and can display the settings on the display/LCD1602) !!

so far so fine, but this is a heck of a lot work to do !! 😉 ..

(i´ve planned to use Volumio on the raspberry ->easy controlling via the web-interface, DLNA-capable, MPD etc..)..

as said, here at first testing-out some aspects/parts for it and a first result by example is that these 3A makes the “blue” ES9038Q2M absolutely a little bit “airy(ier); had before some 2A power supply (12V)..

by that the “Leaf-XMOS-USB-bridge” (->http://essabre-90xx-rpi.sfb2.com/?p=2066) is better than first thought..

+ also my new “ESP32” will come to a new life 😉  (not to mention the Raspberry Pi4 2GB)

makes really a lot of fun here, and i will inform you about some further improvements !!

greets for now !! 😉


Absolutely simple Arduino IR-repeater for Hi-Fi Gear Cambridge Audio CA-540A or other..

so, 😉
after i´ve made some IR-Remote substitutions for my Cambridge Audio CA540 Azur Amp (see “Project-1” and “Project-2” and so on) here on the site with first Bluetooth and then Web-Control i´ve finally made it “over-simple” 😉 and use an Arduino (2,50$) + some IR-receiver (VS1838B)(0,40$) + IR-Transmitter (0,40€) + some dupont-cable (also 0,50$ incl.shipping)->on aliexpress by example..->Link,Link,Link


the point was the right library for this and i used (many,many thx to “Eddy Yanto” !!) the simple IR-repeater-library on github->https://github.com/eddyyanto/ir-repeater
point was that in description it says:”..This sketch receives the infrared signal on standard pin number 3, decodes and dump the infrared information on Serial and forward the raw infrared signal to pin number 4.”; but that works not !!
in the .ino on the other hand it says:”..int RECV_PIN = 4;
IRrecv irrecv(RECV_PIN);
IRsend irsend; // Defaults to pin 3” and thats the opposite !! (works with the .ino-settings now of course)..
tried to reach him via e-mail to correct the description->no success until now..
anyway, u can now use almost any (hi-fi)-remote; place the ir-receiver at some point near u (and to which your remote can point/send to of course), make a dupont-cable-connection to your arduino in any length u wish and from there also in any length to the ir-transmitter !!
(the sketch only receives + transmit->no more other modifications to do in the sketch !! (noob-friendly 😉 )
easy as this and thats it ! 😉 (Total costs: 4$)
(working sketch is here btw.->Link) and on Github of course, again->https://github.com/eddyyanto/ir-repeater
by that i´ve bought some Burson V5i as D (Dual) and will report then about it !!

greets for now 😉

“Arduino goes serial with the ESP8266” / quick and dirty tutorial..

so, 😉
in waiting for the new Op-Amp (and looking for the right case + +-15V toroidal transformer), i´ve revived an old WeMoS D1-R2 (ESP8266)for using it with my Arduino-Cambridge-Audio-IR-Remotecontroller substitution (as wifi-/webcontrol)..
quick and dirty tutorial in the forum->http://essabre-90xx-rpi.sfb2.com/forum/showthread.php?tid=89

nothing special, only that i had great problems in using the softwareserial-library on the ESP8266 and that i used “Serial1” instead (via “D4” (GPIO2)-“Serial1.begin(9600)”)
the sketch for the ESP8266 is built around the wonderful, wonderful “autoconnect”-library by “Hieromon”(as posted before)->https://github.com/Hieromon/AutoConnect

more to come, greets for now !! 😉

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