some quick and dirty pics from the DIY-DAC / best sound via Pi4->SkysongXMOS-Bridge->ES9038Q2M (with Burson V5-D)

so, 😉

bought today again some little stuff for the main-goal here on the site->the own „DIY-DAC/network-streamer“ 😉 ..

decided to built it with a separate power supply/-unit (like for example these Mission-PSXs combos (have often posted about it)..(to eliminate any electronical interference/-noise)(the original „combos“ were only for cleaner/stronger „power“)->

and so, i have ordered some dual voltage AC/DC-converter (rectifier), because the manufacturer always say „..best results with a dual 15V-0-15V power source/supply“ (although the chip itself (ES9038Q2M) runs with 3,3V VCC max. (see this Datasheet ES9038Q2M (LINK))..(guess its about the LM78/9X „.fixed linear voltage regulator integrated circuits“ (i think they took the fixed 15V-version of it)..

anyway, separated today the transformer/power-supply for the ESP32s,oled-display,AK4113 digital receiver etc. to a separate case (in this case also the massive Cyrus-PSX toroidal-transformer (dual 27V) will find his housing))

(Ebay, AC/DC (max. 36V) to 5V-15V Dual Voltage Converter Board Mini Rectifier Power Supply Module, 6€ ->LINK )

and okay, as „i fired it up“ with the Pi4 + Volumio and my other XMOS-bridge (Leaf-audio), got problems in detecting it by the Pi, i used then these absolute wonderful Skysong-XMOS-bridge !! (posted also a lot of it before->http://essabre-90xx-rpi.sfb2.com/?p=1883 ) and got these beautiful tune/sound again !! (and its btw. only with these Skysong-bridge (the Leaf-audio (XMOS too) for example sounds lightyears worser)..

got „dynamic-wise“ about minimum 5db 😉 more „frequency-spectrum“ then with my Bluray-HDMI-I2S-extraction-combo (and thats almost the best/optimum combo for this transporter/hdmi/i2s things)..

absolutely fantastic !! (as said „the Pi is made for music“ + these wonderful „best XMOS-implementation“ Skysong-bridge !!) 

that was it for now, more to come, many greets and stay tuned !! 😉

HDMI to I2S (C1) receiver-board arrived / NE5532 vs. AD797 vs. OPA1612

so, 😉

finally today the „HDMI to I2S (RX-„C1“-PS-audio-standard) receiver-board arrived (LINK-Aliexpress, 14€))->works absolutely great/flawlessly with the hdmi to I2S-extraction-board (HDA20012 GLA V5 TX-„C1“)->

it works „so“, without extra 5V-power (the extraction-board delivers the 5V over HDMI (but u can „jumper“ it))..

„sound-wise“ its a little bit more „flat“/not so „brilliant“ in comparison to a direct I2S-connection (absolutely logical), but i guess so only about 2%-difference 😉 )..(and u have one I2S-solder-/“unstability-problem“ less !)

by that i´ve got an „OPA1612“ a week ago or so, and got now the time to test it out->

NE5532: a lot of body + push, absolutely good overall OP-Amp..(was originally in the „green“ SMBCP-ES9038Q2M-board (V1.07)

OPA1612: very clear, very dynamic, very „roomy“, more „body“ like the AD797, (but also a little bit „thin“ + less „character“)..(coriously today the best from the two (NE5532+AD797) the body/lows from NE5532 and the highs from the AD797)..(„quality-wise“ about 10-15% ahead of the NE5532.)

great OP-AMP !! (but maybe with a little less „character“)..

AD797ANZ: absolutely „creamy“ + sweet+ 3D-ish (almost „heavenly“ 😉 ), but with almost no body/lows..absolutely in the middle/highs and there some „own room/3D/space“, character..(but also a little bit „distorted“ in some way)

a lot of „character“, was my favourite OP-AMP so far..

still complicated (to find the right OP-Amp for yourself), right now/today i´m more „on character“.. (i tested a lot of OP-Amps, Bursons, Muses, LME´s,OPA´s (look right in the widget/categories->“OP-Amps„->http://essabre-90xx-rpi.sfb2.com/?cat=13)

(+ in these region/area of very good/high-end OP-Amps its really only about the „timbre/color“ of the sound (which u prefer)..the sound/tone/content itself still remains..)..

so, will change the OP-Amp back to the NE5532 to get my „test-setting“ back and to work again more „on the chain“ (transporter->hdmi->I2S) before..

(PS.: the OPA1612 is still playing here now; absolutely great, super quality + a great dynamic ! (should compare it again to the Burson or Muses or other OPA´s etc.,etc. for example, but not now) 😉 )

many greets for now + much more to come !! 😉