Well, thanks to @solderdude , I have a handy AB switch at my listening chair to flip phase at the preamp/amp interface.
And on most modern music it doesn't make a noticeable difference. I suspect modern recordings have many tracks in both normal and reverse phase due to many, many processing...
I am still experimenting, my attention being mostly devoted to the war in Ukraine.
The box is working excellently!
However, early impressions are:
1. Some recordings do sound different in different phases. In audiophile terms I would describe it as a modest difference.
2. With those...
Z seems like a bad letter, given the vicious Russian attack on Ukraine. And my last name starts with Z, so I can't win.
I have to do more clicking with my fabulous new remote to get any sense if all new recordings are 'phase neutral. '
I can now happily report to be in possession of an excellent remote audio balanced phase switch, graciously created by @solderdude .
This device allows me to switch absolute phase from my listening seat while the music is playing. 2 XLR in and out plus 5V supply and a green/red LED on the...
Maybe the issue is Rotel's USB input?
DAC is supposed to claim IOS equivalent of WASAPI - the volume is disabled.
I will check all of my DACs - I remember that one of them allowed me to control volume on the iPad, just can't remember which one.
Added: I can report that my DACs that allow for...
Maybe there is an IOS setting that needs attention?
I have a bunch of DACs and they all seem to act the same connected to an iPad.
I will cycle through them to make sure.
The only difference in our setups is that I use a switchable powered USB hub to direct the digital signal to several DACs...
On my system, Apple Music sounds fine. I also can't change the volume, just like Tidal and Qobuz, implying bit-perfect transmission.
Are you using this thingy for connection,?
Apple Lightning to USB3 Camera Adapter https://smile.amazon.com/dp/B01F7KJDIM/ref=cm_sw_r_apan_glt_i_HFDB9J40X8BXY4VB81Q1
Let me check. I haven't listened to Apple Music for a while. I have Tidal and Qobuz on the same iPad, so I can compare.
What tracks did you find to show the Apple/Tidal difference more?
I can report that in Qobuz and Tidal the iPad's volume rocker is disabled.
This strongly suggests bit-perfect - IOS equivalent to Windows WASAPI connection.
Good observation. I set the volume to max on the iPad and the setup triggers MQA recognition on Gustard X16, suggesting bit-perfect.
I will lower the volume and see if above changes.