Monat: Juli 2018

Volumio v2.444 out / “Allo Katana”-support -> works on “chinese”-ES9038Q2M too !! / massive.. ;-)

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so, 😉
a new Volumio is out->V2.444 ; its here->https://volumio.org/get-started/..
changelog says: “..Pi kernel bump to 4.14.56, Allo Katana support etc.”..
tested it here rightaway with the ES9038Q2M (2*AD797)->”massive” 😉


but back to the Katana-overlay: at first “hear-out” i´ve got the feel its more “massive”, more “accentuated” (especially with the 2*AD797)..
don´t know at present if its the Katana-option, or the optimized Volumio-“footprint/improvements” (see changelog)..
unfortunately i´ve got only 192khz/24bit with “audio resampling on” (set it up for 384khz but got only 192/24)->

by that, there´s also a new “Volumio ESS9028QM“-option; works too (with the “Blue” ES9038Q2M) (but didnt test if it reaches 384khz)..
but anyway there´s absolutely an improvement “sound-wise” again !! “sounds” again more “right”; really heavy, absolutely to recommend !! (RPI 3B-ES9038Q2M-2*AD797)

by that i´ve experimented a little bit more with “node-red” and now with “MQTT-broker,-subscribe+publish” and so on; really freaky, u can seamlessly connect an android app (->picture) with a pi zero as mqtt-broker and then via bluetooth (or websockets) to an arduino or esp32s..as said absolutely “whacky” 😉


(“IoT MQTT Panel”->google/android-playstore->
https://play.google.com/store/apps/details?id=snr.lab.iotmqttpanel.prod&hl=de)

(this is as said, all for (in favor) of our lovely “DIY-DAC“-project , display and usability-wise)..
(will post maybe then more..)
but as said, really a sound improvement with the new Volumio (+”Katana”-option)..
greets for now 😉

Raspberry Zero W V1.1 + Volumio / I2S-connection + Dietpi-Update V6.12

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so, 😉
its a little bit silent here lately but it doesn´t matter->here some infos about a Raspberry Zero W V1.1..
because they´ve updated the Arduino-ESP32-core here on github->https://github.com/espressif/arduino-esp32, and my self-made-noob-sketch didnt work since then on my Doit-ESP32S-V1 anymore, i thought also about to use my raspberry zero W V1.1 to control the ES9038Q2M via web or BT (for the I2C-control of the Digipoti MCP4131 for example, or the relais-control for the different-filter-settings and so on..)
for this (on a raspberry) “Node Red” (a programming language/editor) looks like a very good attempt/approach..post maybe then a little bit more..
anyway first i have to get the zero to work with any of these chinese-ess90xx-boards..
I´ve ordered the zero w without a pre-soldered header and without a “hammer header”; u can get them so at pimoroni for example of about 13,50€ !! (incl.shipping)->https://shop.pimoroni.de/products/raspberry-pi-zero-w
(u can also get there a raspberry zero (without wlan) for 5,05€ !! (+3,50€ shipping)->https://shop.pimoroni.de/products/raspberry-pi-zero

but this self-soldering is IMO on this little raspberry a bit more complicated than normal, it was difficult to get an I2S-DAC-board on this to work..
heres again a little picture how to connect the I2S-lines: (the pin-layout on my zero w V1.1 is exactly the same as before (on a RPI3B for example) (because someone said there are different pin-layouts on different zero´s)

so, i have to use Volumio first to check out where the problem was (the soldering 😉 ), and i took the fresh 2.413 (https://volumio.org/get-started/)..
works absolutely fantastic here now with an ES9028Q2M (+Muses8920); almost no horrible pops+clicks at changing volume/tracks/audio-formats..
I use here now the “hifiberry-dac” settings; the “RPI-DAC” settings are working too (but be careful while using the hifiberry-dac settings->u have to set the target-bitrate to “24bit”(audio resampling on); else u get a horrible noise (but this was clear if u have followed this blog/read a little)..


as said, fantastic here now (i´ve originally wanted to use my old ES9023 for this; but got no sound at all (was this soldering problem 😉 )..
and by that u can use the raspberry zero W V1.1 also with a normal usb-cable on a normal usb2.0-port (500mA)..for me here its enough; hadnt to use the original Pi-power supply (2,5A or something)..
also, Dietpi is now at V6.12 and i still want to buy some green ES9038Q2M V1.07 and some OPA627 😉
greets for now 😉

“allo-katana-dac-audio.dtbo” available now in DietPi V6.10

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so, 😉
the “allo-katana-dac-audio.dtbo” is now available in DietPi V6.10; means u can select “”allo-katana-dac-audio” in DietPi->DietPi-config->Audio..
i´ve tested it here with a “Blue” ES9038Q2M->no success/sound..
(i use the “i-sabre-k2m”.dtbo in DietPi->works very well with the ES9038Q2M here.)

was to be expected because (as earlier posted) the .dtbo adresses the mcu on the katana-board and apparently not on our cheap and lovely chinese 9038Q2M-boards..
else nothing particular new, except i really want to test some “OPA627” (the “Bugatti Veyron” under the OP-AMPs) and want to buy some new, green ES9038Q2M V1.07 ..
greets from here !! 😉