Kategorie: Raspberry Pi

Raspi-AK4137 single-HAT for 2/3B/3B+ Pi (30$) ; “Sonore” ISO2DSD v7

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so, 😉
thx to this phenomenal (post) in the diyaudio.com-forum->https://www.diyaudio.com/forums/digital-line-level/314935-es9038q2m-board-278.html,
we have now here our AK4137 as a single HAT for the Pi !! 😉
as said in earlier posts, we have to improve the signal-quality(lower jitter and so on) over I2S->http://essabre-90xx-rpi.sfb2.com/2018/06/srcs-ti-4192-ak4137-volumio-update-foo_dsd_asio/


it costs only 30 !! $ and u can get it here->LINK
“..The main function of this board is to improve the quality of the Raspberry Pi I2S signal and reduce jitter. And make up for the Raspberry Pi I2S output without MCLK! The original I2S output of the Raspberry Pi does not have MCLK and most high-performance DACs require MCLK to work. And the AK4137 reconstruction clock reduces the Raspberry Pi output signal jitter enhancement.
This board supports Raspberry Pi 2B 3B 3B+”..
so, as also posted earlier the AK4137 has 768khz (PCM) + 12.288 MHz DSD and DR: 186dB !! ● THD+N: -150dB ->AsahiKasei(AKM) datasheet->Link

(u use it between the Pi and our ES9038Q2M for example..a really long explanation on the other functions of this HAT is in the ebay-description above)

by that i came by chance (and according to the previous post) about this “Sonore ISO2DSD“-converter (a GUI for the sacd-ripper) + “Sonore DSD2FLAC“->


u can download both from here:
https://www.sonore.us/iso2dsd.html
https://www.sonore.us/dsd2flac.html

many greets for now !! 😉

Some new ES9038Q2M-things../ Raspberry Pi 3B+ first impressions..

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so, 😉
some user at my praised Diyaudio.com-forum->Link said something about a new MShow-Audio “SU5-ES9038Q2M-DAC-HIFI-XU208-DSD-TPA6120-Headphone-audio-Amp-Bluetooth-5-0″->Link 160$, and interesting is that they used some AK4113 for SPDIF-conversion; posted here earlier something about it->Link; for me another “indicator” that the “original”-spdif conversion by the ES9038Q2M on this board is not soo good as expected, as stated also earlier; better choice would be using some SRC4192 or AK4137->Link

by that, as thinking to buy some Green ES9038Q2M V1.07, including the display, i found some pictures with this display delivered/attached in “action” and that looks not soo nice (frankly said) 😉 , so i think its better to continue to try to build an “own” version (display-wise) 😉

by that i´ve bought some new Raspberry pi 3B+ (cause i´ve “fucked” up my Raspberry Zero W with some ugly soldering) and first thing i can say about the new “wifi” (N/AC) that i had yesterday (measured with iperf3) 84Mb/s (10MB/s) via N (Asus-RT56U); not soo good (expected 300mb/s)..
greets for now 😉

New Picoreplayer is out->V4.0.0 beta 5 + Moode 4.2 install instructions (“moslog”)

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hi there, 😉
a new picoreplayer is out->V4.0.0 beta 5->https://www.picoreplayer.org

its almost the same; like in this phenomenal 😉 , earlier post-> http://essabre-90xx-rpi.sfb2.com/2018/04/new-picoreplayer-is-out-v3-5-24-march-2018/

this time they have a rpi-kernel bump to Kernel 4.14.56, the DSD(Dop-)-“native patches” are included, selectable..

tried to use the new “Allo Katana”-overlay here too on an ES9038Q2M->no success/didnt work/squeezelite refuses to start..

use now again (as described in the mentioned, earlier post) the “i-sabre-9023“-overlay, checked “384k” and “bclk_ratio_int_div” option, under “Card Control”..

got 32/384 without any problems, same with DSD-“material”->up to 32/352..(see also earlier post)..

but still a little bit “metallic”-sound; as described and still don´t know why..

“Volumio” for example has for my ears (IMO) a far far better sound/tune..

second:

a few days ago, i tried to install Moode 4.2 on a fresh raspian-stretch-lite..i knew there were such commands like “mosbrief,moslog and moslast” for monitoring the installation progress; but i didn´t know how to use it correctly..

started the installation anyway, but as you see absolutely nothing !! u don´t know if it hangs/or is finished or something and so i had an incomplete installation after all..

so today i had the time to re-test it; in short: place a “ssh”-file in the root of the card (after imaging the raspbian stretch-lite on it); u can now ssh on it..make the commands for the mosbuilding (absolutely fabulous !! article about it in english here->Link and in german here->Link (fabulous !!)

after rebooting the first time (u first have to make a “hard-reset”, means unplug and re-plug the power (else it didnt work !!) u can now ssh on the pi again (while still working/compiling etc..) with now (and thats important too) ssh-login: pi and pass (thats new): moodeaudio

now u can type “moslog” and can watch the installation progress, wonderfulst !! 😉

(by that i´ve “demolished” my lovely raspberry zero w ;-( , wrong soldered and so on (but this “soldering” was, as said, more difficult than on an arduino or esp32-board for example)..

i still want to buy a new ES9038Q2M Green V1.07 and finally some OPA627, but have a small “cash-flow”-problem, “distinguished said” at present 😉

will post then maybe more again 😉

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 !! 😉

Moode/Volumio on a raspberry pi vs. Samsung Bluray-player (spdif-coax) Impressions..+SRC4392 (+beta “Project 2”)

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hi there, 😉
long time not seen..its a little bit silent here lately but absolutely no worry/problem..
okay,
i´have here some Samsung Bluray-Player (BD-H5500); not the worst; only with some spdif-coax output..
some days ago i thought the only, true,real good sound is via some very good CD-transporter/drive/device + directly via spdif into the ES9038Q2M and go 😉 ..
but as i heard today again the ES9038Q2M with the raspberry pi (Model 3B) and some flacs i felt its really a class of its own !!
1-2 level (soundwise) higher !!
(at present btw. i think Volumio (hated it a long time) has a very good sound/tune; a bit better than Moode 4.1 (then picoreplayer and so on)..DietPi (V6.8 now) is still “in the lead” (IMO) but usability-wise Volumio is great..)
so, back to topic: i really don´t know why the flacs on a pi (and via I2S) had a such great sound/tune in comparison to some “normal” CD-spdif-combos (IMO)..absolutely don´t know why; but it is (and this is said by really a lot of people in the “Hifi-world” ;-)..(maybe its because of this delta-sigma-conversion and the “required preliminaries”)..
by that i think meanwhile the spdif-“conversion” on the ES9038Q2M could be a problem; its not soo high-class/hi-fi as expected..(spdif-receiver-side)
in my praised DIY-audio-forum->http://www.diyaudio.com/forums/digital-line-level/314935-es9038q2m-board-129.html, they are looking lately for some “SBC 4392” asynchron frequency decoder boards for spdif/usb decoding with 144 db !! thd and ultra-low jitter too..

Link (60$-90$)
think absolutely the same here and because only of “hearing” out the “distortion/jitter” via the spdif-receive-unit/decoding on the ES9038Q2M..
(so to see u must use such a SRC4392 before your ES9038Q2M and then via I2S in it, bypassing the onboard-spdif..)..
so, by that i definitively want to try out some AD797 in future (have now some Muses8920 in it) and i also want to buy definitively a new, “Green” ES9038Q2M V1.07 because i still think the “Blue”-ones (have one here) sound really not so hi-fi as they could/expected (we discussed it here a few weeks ago)..

by that i revive my “Project 2” a little bit; means BT/Web-control for the different-filter+HW-Volume settings on an ES9038Q2M (u can meanwhile buy it as “set/package” with display and rotary encoder/apple-remote but nevertheless)
this time i used some “Geekcreit ESP32S Devkit-V1“-board (links/first thoughts about also at the forum-> link-FORUM ) (first post)

(ESP32S connected to a PCF8754 via some 5-3.3V logic-level-converter, controlling a 4-port relay and then to the 4 jumper on the ES9038Q2M..HW-volume via some MCP4131 will come hopefully later..)

but as said earlier, i hear almost no differences between the filter settings on these ES9038Q2M, but when, i would prefer JP3+JP6=”linear phase fast roll-off“

(as said, here now listening to it with this filter-setting on a pi with Moode 4.1; and so “dry“; absolutely low latencies, perfect (but as said, Volumio/DietPi sound a little bit better (IMO))
many greets for now 😉

 

ES9038Q2M: interesting facts + ES9038Q2M DAC HAT by “iancanada”..

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so, 😉
came by chance about this facts/post in this very interesting forum->http://www.diyaudio.com/forums/pc-based/302687-es9018k2m-es9028q2m-9038q2m-dsd-i2s-dac-hats-raspberry-pi-17.html
“iancanada” posted:”..ES9018 and ES9028 need the small DoP daughter board (which can be plugged in the IsolatorPi) to convert the DoP stream into DSD. However ES9038Q2M has a built in DoP decoder, so, for ES9038Q2M, the DoP daughter board is not a must.”,
+”ESS9018/28/38 has internal 32bit digital volume control. Much better than any 24bit digital volume control, but still not as good as the analog one on my PASS XP-10. However according to my listening experience, the difference is not that huge.”..

by that his “ES9038Q2M DAC HAT” looks very fine, neat and “sophisticated” 😉 ; mail him..😉
(also very interesting other (DIY-Audio) projects there !! ->https://github.com/iancanada)

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