as said, „we“ have to improve the input-quality (to an ES9038Q2M par example) jitter+dynamic-range/SNR-wise->“Dynamic range: 144 dB (-60dBFS input, BW = 20Hz to FS/2, A weight),THD + N: -140dB (0dBFS relative input, BW = 20Hz to FS/2) (excerpt datasheet Ti SRC4392) over I2S (directly to the ESS-chips) from spdif or USB..
„Markw4“ at my praised diyaudio.com-forum (Link), has posted some beautiful pictures about it (hope i can use them here too, if not please e-mail)..
(he posted also that is very important to have a short, in best case shielded, SRC-I2C connection(-cable))..
so u use it before the I2S-input on the sabre-boards..
The Ti 4192 supports only sample-rates up to 212khz, the AKM AK4137EQ „Flagship“-SRC 😉 reaches per datasheet 768khz (PCM) + 12.288 MHz DSD and DR: 186dB !! ● THD+N: -150dB ->Link
(the first picture is with an AK4137-assembled board (80$)->Aliexpress-Link )
„Markw4“ also said that it (the AK4137) sounds maybe „slightly better“..
some Ti SRC4392 is here (25$):-> LINK
(u can get it also assembled+USB-port/connection (60$) -> LINK (as also posted earlier))
have to think about it 😉 ..
okay, next thing is that Volumio is now at 2.411 ->https://volumio.org/get-started/
and another funny/interesting fact is that as i´ve installed a new Win10, i didnt got foobar2000 configured with foo_out_asio although i thought i had all „components“ (foo-input-sacd, asio-proxyinstall etc..) correct „applied“, but i didnt have the „foo_out_asio“ selection (or asio at all)..
searched for the foo_out_asio_plugin but didnt find it (the right one)..
found it back in „our“ Topping DX4-driver pack->its here again foo-out-asio 2.1.2 (foobar2000 component)->http://essabre-90xx-rpi.sfb2.com/pics/foo_out_asio.fb2k-component
greets for now 😉
hi there, 😉
a new picoreplayer is out->V3.5->https://sites.google.com/site/picoreplayer/home/news
new rpi-kernel/firmware, „..Updated to Squeezelite 1.8.7-1052, includes native DSD support.“, got it to work (ES9028Q2M) with the „I-Sabre-9023“ „card-control“, checked „384k“, Logitech Media Server is now at: V7.91->http://downloads.slimdevices.com/nightly/?ver=7.9
(nevertheless u have to activate the DSD-plugin under „plugins“))
sounds very „strong“, good, low latencies (thx to the new rpi-kernel+firmware and so on), got DoP with 352k and without any commandline-options like „-e dsd“ or „native DSD-patch“ and 384k PCM with „X“ (command-line-option)..
very „fast“ (low latencies) as said->absolutely the advantage of a very slim/less resources using system; no disruptive layer/driver..
(but as said, still with a little bit „metallic“-sound; don´t know why..)
sorry, i´ve just seen that it was impossible for unregistered user/guests to see any content in the forum->forget to uncheck „Force Guests to register/login to access the full content„(it was, as i hardly remember, because of the f***** spam-attacks); its solved now..->FORUM
second i´ve made a new post how to change the „identifier/baudrate/pin“ of a HC-06-BT-module->http://essabre-90xx-rpi.sfb2.com/forum/showthread.php?tid=34
third i´ve updated to „DietPi 6.4„->http://dietpi.com/ and it plays here soo very well with my „ES9028Q2M“->absolute wonderful..(just connected 2 DIP-buttons via a breadboard to the 8 pin HW-control on it..); soo nice..(i will also try in future to solve/control it via some BT/Arduino-control)
fourth i´ve installed/set up a „search„-widget in the upper right..thought it was already there but wasn´t 😉
see at the top line..
must be out for a few days now..
http://www.moodeaudio.org Forum:-> Link
(little installation reminder debian-stretch-lite: user pi pass raspberry..for ssh enabling ->sudo raspi-config)
its very,very sad, but „Fourdee“ over at DietPi decided to go back to RPI-stock-kernel means no more enhancements/improvements in 384khz-playback in Linux/RPI-kernels (for our lovely chinese ES90xx-Boards via I2S) ;-(
thats really,really sad because in the earlier Versions of Dietpi (i guess till V1.54) it was the only RPI-audio-distro which sounds really good (Best !!) with at that time the ES9023 (dtoverlay=hifiberry-dac)+ES9018K2M at 384khz with no prob played via MPD..
u could change the sample-frequency via their wonderful „Dietpi-Boom“-Gui..;-(
Text on the Github-Page->Link:
„I’ve taken the decision to revert our DietPi RPi kernel to stock RPi kernel.
Currently the only difference in our kernel was:
DSD pop prevention on initial playback.
We simply do not have the man power and available time, to ensure this is updated regularly with requested patches. Time we can use to focus on supporting bug fixes and improvements for DietPi.
In future, all RPi kernel patch requests should be made directly to the RPi foundation, who have paid employees dedicated to that specific task:
This will ensure all RPi users will benefit from the requested fix, if accepted by the kernel maintainers.
I apologise if this effects audiophile users, however, I hope we have your understanding for this change.“
so, we have to look now for alternatives, cause as said DietPi has for me the best „sound“ of all (audio-)-distros for the RPI (guess it was because of the lightweight-design (less processes,less distortion))
1. Moode ->Link… now at V4.0Beta12..has also canceled their RT-/advanced-kernel thingy..(all concerning the support of our lovely chinese ES9023,ES9018K2M,ES9028Q2M and ES9038Q2M-boards via I2S)->hope they will invent it again..
2. Volumio ->Link (now at V2.348)… found it really horrible at the beginning but meanwhile its much better..absolute easy to use; almost no pops,clicks, and a very relaxed/easy use (try it again 😉 ) but now also not with full 384khz support for our boards via I2S..
3. Picoreplayer ->Link.. now at pCP3.22 (27.Sep.2017)->absolute 384khz-capable (look at the other posts), but not so comfortable..
these 3 were my choice after i tested a lot of other audio-distros for the RPI at the beginnung with our ES-Sabre-Boards(there were a lot more, Daphne, Rasp-something, Runeaudio etc..but the above were the best/most comfortable imo)
if u mean u know another good audio-distro (comfortable, easy to use, 384khz) please leave a comment here !! (and we can move it maybe to the forum->http://essabre-90xx-rpi.sfb2.com/forum/)
i normally „hate“ this Volumio->came back to it by chance..
so, very smooth and clean..not so many pops,clicks and noise..relaxed..->try it !! 😉 (i wondered myself->relatively good alternative to the other rpi-audioplayer at present)
I used „Generic I2S DAC“ and then came „Hifiberry-DAC“ automatically..
tried to upsample it to 384khz but was not possible „ALSA-error“->and so we are back to the main problem with 384khz and this ES9028Q2M-Board (tried to recall it here, before i forgot it again):
Over I2S and the RPI3B its normally only up to 192khz->for more (384khz) u need a kernel patch..
In picoreplayer u can use the „es9023“ overlay and the the „384khz“-option then (as said some articles before); but picoreplayer is not so comfortable..
same at present with MoodeV4B9 and „hifiberry-dac“->because it has not now the advanced and realtime-kernel as before also no 384khz: same at present with Dietpi..
DoP seems possible; and so we come to the next article->DSD-LED (+Volume and FIR-Buttons) on these ES9028Q2M->http://essabre-90xx-rpi.sfb2.com/2017/11/dsd-led-volume-and-fir-buttons-on-these-es9028q2m-boards-diy/