Yes, it's THIS version... It's still in testing... I posted it on the last page. Not sure about Volume control but it can be powered by a phone, no need for a extra battery like the current versions.
https://e1dashz.wixsite.com/index/9038d
#9038D
Specifications(TBD):
Status: proto
Retail cost: TBD(***)
Materials: sandblasted/black anodized aluminum/laser mark/ES9038Q2M/AD8397
Dimensions: 48x22x9mm
Weight: 15g
Power: USB +5V/-5V power rails no internal battery, 170mA idle current, the device contains up to >4000uF of capacitance but IOS/Android devices
start OTG operation without Camera_Adapter and USB OTG Y-splitter cable respectively
Input: USB-C, PCM up to 24b/192kHz
Output: standard unbalanced output 3.5mm jack
Output impedance: .05 Ohm@1000Hz Agilent U1733C
Output power: >340mW@32Ohm@1kHz@THD=1%
Output power: >600mW@16Ohm@1kHz@THD=1%
measured at +.5dbFS level, typical PC USB2 port powered
Frequency response: 10-85kHz +.05/-.2db@ 24b/192kHz
S/N ratio: -123db(A) referenced to 3.399VRMS @32ohm THD+N = 1% @
+.5dbfs typical PC USB2 port powered
DR AES17 121db unweighted
THD@1kHz@-3dbFS .00025% typical for Performance Mode 24b/44.1kHz@32Ohm
THD+N@1kHz@-3dbFS <.0004% typical for Performance Mode 24b/44.1kHz@32Ohm
THD+N@1kHz@-3dbFS <.0015% typical for Performance Mode 24b/44.1kHz@16Ohm
THD+N@1kHz@-3dbFS <.0004% typical for Normal Mode 24b/44.1kHz@32Ohm
THD+N@1kHz@-3dbFS .25% typical for SE Mode 24b/44.1kHz, almost only 2nd harmonic
Crosstalk: -125db@1kHz