the long promised „Allo Katana„, a „monster triple-dac“ hat->controller+psu/dac/output and with 6 Op-Amps from Allo is appearantly in the last stage..
(picture is from here-> http://www.forum-hifi.fr/thread-7848.html and relatively „fresh“ and/but i don´t know if this is exactly the promised Katana-DAC/HAT, but looks so..(95%))
by that if u really want some fresh/new audio-(dac-hat) info 😉 go to the phenomenal board diyaudio.com/forums..
absolutely superb there; there are sooo much super interesting threads->for example this http://www.diyaudio.com/forums/vendor-s-bazaar/310338-dac-allo-ess9028q2m-rpi-35.html or http://www.diyaudio.com/forums/digital-line-level/317577-allo-boss-dac-1-2-performance-4.html and so on and on..(some Link is also in the sidebar on the right->links)
this site is absolutely „low-mo“ 😉 in regarding/comparison to the super interesting infos there..
by that, as said, the „allo-katana“-.dts was accepted by the rpi-mainline-kernel maintainer->(link maybe later) and i first thought:“yeah, then we finally have our es9038q2m.kos for the chip“, but they said, this .dts adresses the special mcu by Allo which adresses then the ess9038q2m-chip..
anyway, here is (imho) a super interesting excerpt of the code for the .dts file: (sound/soc/codecs/sabre-ess.c and sound/soc/codecs/sabre-ess.h) from here:->https://github.com/raspberrypi/linux/pull/2519/commits/e67122b366f539713cf6ef91c63ab00cb269113d
it shows the different register of the es9038q2m (or in this case the allo-mcu but the basics are the same i think) + the adressing->
some user over there is also a few steps before reading out the mcus on our chinese-9038q2m-boards (i tried something similar a few months ago in trying to read out the mcu on a ES9028Q2M via the onboard SWIM-interface and with a ST-Link V2 but with no success)..
so, as said, very interesting, but go and visit these phenomenal diyaudio.com forums !! 😉
because i´ve got now the possibility to change the 7 different-filters „on the fly“ (on the ES9038Q2M), means no annoying jumper settings, and via BT or web-control, i can say/state a little bit to my impressions about it:
I tested it via jumper (manually) a few weeks ago and at that time i´ve got the feel that it makes a huge difference, up about to 20%, and i really loved the „linear phase fast roll-off filter“ (JP3+JP6)..
but, now, yesterday, i didnt feel it was such a huge difference, only about to 1-2% !! the other „circumstances“, quality of the source, the right op-amp, the quality of the power-supply (15V and or +/- 15V) have absolutely a really greater impact of the sound/tune..
The filter here on the ES9038 are really on the digital/sample-site, there is no more 3D, spacious or something and had almost no effect on the „true original“-tune..
if u really like the bitperfect, faithful, „true to original“ tune, u have to improve your hi-fi in another place..
with the different filter u hear something more expressed (or decreased) but the overall „sound/tune“ stays the same..
so, in this case, i/u have to work more on the power-supply-side, onboard voltage supply on these Chinese-ES9038Q2-boards/cable/source-material and so on (as said).
On the other hand are there a few differences in the „sound/tune“->here is a very interesting picture from stereo.net.au->https://www.stereo.net.au/forums/topic/81435-ak4490eq-filter-adjustment/, its about filter settings on an AK4490EQ, but the basics are the same..(i´ve also posted a few month ago an article about different-filter-types and the impact on the sabres from resonessence-labs („Invicta-Mirus“)->
and i got/have almost the exact feel about it !!
very interesting is also this „Sound Source Positioning“->had the exact impression in changing from one filter to another->also thought „..this voice/guitar/something is more in the back or in the front..“ and so on (normal hi-fi experience) !!
Summary: u can hear/have differences, the filter on this board have not soo much impact (imo), but also try to improve your hi-fi in another place !!
(filter/jumper settings ES9038Q2M „Blue“)
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)
came here by chance to a new very interesting ES9038Q2M-forum->
some interesting pics/news on it, par example that the Green 1.06 has 7805 instead of 7808 on it and so on 😉 ->
by that, there is also a link to a 9038Pro-DAC (DACES9038PRO) designed by Andrea Ciuffoli/Quang Hao + a lot of interesting infos around the schematics of the sabre-chips->http://www.audiodesignguide.com/DACES9038PRO/
greets for now 😉
hi there !! 😉 ,
came by chance about this gem->HIFIME UDA38PRO DAC (ES9038PRO + SA9227) with an ES9038pro !!
just absolutely fresh out->yesterday or so->“HiFimeDIY:
07/02/2018, 07:06:32 AM
Hi everyone, it’s now available to order! https://hifimediy.com/uda38pro-usb-dac-es9038pro Some more data will be added to the description soon. We do have a few units available now, and more after Chinese New Year. And we managed to get the price down to 219€„..
„The Hifime UDA38Pro utilises the ESS Sabre ES9038Pro DAC chip that has received a lot of attention and praised as the most important new DAC chip in ages…We have paired the ES9038Pro with OPA1622 output stage amplifier that can drive a wide range of loads including low and high impedance headphones and also line level loads like preamps and amplifiers… it can achieve up to 140dB !! dynamic range, -122 dB (0.00008%) total harmonic distortion plus noise (THD+N) in mono mode
Specs: (to come..)
no worry about the ES9038Q2M 😉 there are new ES Sabre-audio-chips on the way/in the pipe.. 😉
and because this is an audiophile-site i present here some (mobile-)DACs from time to time..->http://essabre-90xx-rpi.sfb2.com/category/dacs/
came by chance about this thing on Massdrop->https://www.massdrop.com/buy/smsl-iq-portable-dac-amp..
cost only 109$ (88€ !!) but is shipped not before March 8, 2018 !!
the specs are looking great:
Dynamic range: 125 dB
Frequency response: 10 Hz–100 kHz
THD + N: 0.0003%
SNR: 118 dB
Bit depth: 16, 24, 32, 1 bit
Sampling rate: PCM (44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 705.6, 768 kHz); DSD64, DSD128, DSD256, DSD512
and according to this pictures/links it has 2 !! ES9018Q2C-chips onboard..
same with the Sabaj DA3->there also 2 !! ES9018Q2C..
they also said this Sabaj D3 with 2 Sabres sounds better than an Cambridge AudioDacmagic V2, what i really believe because i had an Cambridge Audio Dacmagic here and it was well manufactured but by far not such a high resolution as the ES9018K2M by example; on the first DacMagic there were Wolfson-chips in it->see review at the forum->LINK
other useful links->https://www.head-fi.org/threads/smsl-idea-portable-dac-amp.851110/page-22
6000$ -> Mirus Pro -> Link
(they use 2 * ES9028Pro-> >130DB THD..)
(II. in the „old“ Invicta they used 2 * ES9018 and with AD797-opamps btw..)