I write, record, and mix my own created music using studio quality software and flat response audio equipment.
The audio of the S25Ultra via USBC to my vehicle Audio system is very muddy. All of the mid to high frequencies fidelity is cut off and your 250 and 500 are brought way to forward. This makes them interfere with the fidelity of the other frequencies that are making it through. Also the blocking of using the base sliders while using headphones or USBC is really confusing.
None of the various options in the menus resolves this lack of fidelity and muddiness. I have tried various USBC audio specific cables with the same result. I do not use blue tooth because blue tooth in general has audio quality consistency issues.
I also have an S20TAB that plays the music perfectly through the USBC cable. No adjustments were ever made to alter the audio in that device.
If the phone is attempting to "fix" or "enhance" audio by default please stop this. I have noticed in the past that many attempts at preprocessing audio enhancements destroy audio quality. Please allow for a flat play through.
If you do all of that then you should know that you can download a free application called sound beautifier on the Android Market that will increase your audio enhancement.
