Monat: Mai 2018

Op-Amps: LME49710 vs. Muses8920/LME49720/OPA2134 ->more “contur”

Kommentar hinterlassen

so, 😉
got finally today my Dual-Dip 8 converter (1,45€ Ebay) LINK->

that i can use my bought, nice “LME49710”-s (they are single)->

first impressions:
a lot of “contur”; more than the Muses8920; but no so “lively” as an OPA2134 for example (or the Muses.)
i guess its absolutely because of the lower distortion; also a little bit “cold” (all only my impressions; some would feel maybe different about it)..
but its also a “high-class”-duo/OP-AMP ; see this table again->

(and curiously absolutely exact my impressions about them; in only hearing them “out” here..)

Conclusion (Ranking Op-Amps at present(for me)):
1. still the Muses8920, but really tight behind-> ((update 2hrs later: i don´t get it; everytime i plug the Muses back-in again, i´ve got everytime the feel:”thats really hifi !”; such warmth+musicality..so “harmonic” (must have something to do with the 2nd and 3th grade harmonics and so on))
2. LME49710; about 4-10% (IMO 😉 (more “clinical”+”contur”; has also its advantages))
3. OPA2134 (because of its “lively/airy attitude”)->10-15% back (to the LME49710)
4. LME49720 (for me a little bit to thin; but also very good in the “highs”) ->2%-5%

and very interesting would be how the AD797 were “performing”; i had an AD1988 as soundchip and as i hardly remember they were absolutely “sweet” in the highs; never had such a fine resolution (mainly in the middle/highs)..
+ the “Bugatti Veyron”(->Link) of the OP-Amps, the OPA627 😉 ..
so, at present i will stuck with my “Muses8920” although the LME49710s are absolutely close to them (maybe better in some “scope”)
greets for now 😉 (and thats all only my impressions; they are all very close and it depends really on your personal taste !!)

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

Kommentar hinterlassen

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 😉

 

Alsamixer-/control I-Sabre-K2M (-Q2M)=”Game-changer” + Audiophonics ES9038Q2M Kali-Edition..

Kommentar hinterlassen

so, !! 😉
don´t understand/got it at first, but as “Terry” sent us a link to the new Audiophonics-ES9038Q2M KALI-edition->
https://www.audiophonics.fr/en/diy-dac/audiophonics-dac-i-sabre-es9038q2m-kali-edition-raspberry-pi-i2s-spdif-pcm-dsd-p-12811.html, (Link-forum here)
i´ve looked through the description (after a few times visiting) and saw
“DietPi-compatible” and this picture:

then i looked through some other audiophonics-documentation and there it says:(Link-Audiophonics-topic->LINK)
“..Audiophonics I-Sabre K2M DAC Board ALSA Driver !!”->”.. SatoruKawase/I-Sabre-K2M” !!
and this is exactly the same repository “SatoruKawase/I-Sabre-K2M”which “Kennyliveforever” mentioned and from, i guess, DietPi download the binaries for the changed “I-Sabre-K2M”.dts-overlay !
so, thats really a “game-changer” !!
it´s so possible now to change the ESS-HW-control+FIR-selektion+Sources “on the fly”, means via an “alsamixer-terminal” !!

“millions of new possibilities” 😉 (display and usability-wise)
(just tried here right now to change the filter-settings via an alsamixer-terminal->no success..same with input-selection+HW-volume-control..guess its audiophonics/mcu-specific; but nevertheless a great improvement !!)
+
I´ve just seen at audiophonics too that it is possible to upload some driver (in this case audiophonics-ES9028Q2M) via the plugin-upload option in Volumio !! (maybe we´ll get there some new/updated “generic” ES9038Q2M-driver too !!)(LINK)

thats all wonderful, greets for now !! 😉

Again: The “..there are no differences between Op-Amps”- fable !! (OPA2134-NE5532-Muses8920)

Kommentar hinterlassen

so, 😉
again: i´ve changed the NE5532 on the ES9018K2m today to an “OPA2134” and i hear absolutely great differences..
The OPA2134 is very “airy”,”lively” (in comparison to the NE5532) see this post:->http://essabre-90xx-rpi.sfb2.com/2018/04/op-amps-ne5532-vs-opa2134-vs-muses-8920-02-essabre-link-dietpi-6-5/
and has (brings back) a certain “glance” in the high-middles/highs..and this is all too because its very less “distorted” than a NE5532 par example..
okay, it misses a little bit the “push” from a NE5532->all said and written in the above mentioned post and some other..
(update: for me also too “thin”; but for this we have our lovely “Muses8920” 😉 )
but the main fact is that there are absolutely great differences; okay i have here a Cambridge Audio Azur 540A amplifier and some phenomenal Mission-Cyrus-speaker; so more “monitor/neutral/british”-sound..
but i dont get it, why some people say (like in my “praised” diyaudio.com-forum too) they hear almost no differences and “..there is to be cleared if its to hear at all”
???
are they (some) completely stupid there or what ? 😉
and such crap i´ve read also as i started to read/buy/change the Op-Amps on our lovely essabre-boards too and this “comments” almost hindered me to start it at all..
so, to come back to start:
upshot: there are great differences by the different OP-Amps and u can hear it loud and clear !! 😉