iBasso DX90 - Device Settings; Audio Settings; Music and USB Settings

DX90 User GuideUser Guide
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Settings:
EQ：
One can setup the equalizer as desired. Press the “reset” to reset a pre-set EQ.
Play Mode：
There are four options: order, Loop, Shuffle, and Single Repeat.
Gapless：
One can enable the gapless to eliminate the gap between two tracks.
Music Info：
It shows the detailed information of the currently playing song.
L/R Balance：
Slide to R to increase the volume in the right Channel.
Slide to L to increase the volume in the Left Channel.
Digital Filters:
There are two options: Sharp Roll-off, and Slow Roll-off.
(1). Sharp Roll-off.
With the Sharp Roll-off, one can see the frequency curve drops significantly. The Sound
is less aggressive.
(2). Slow Roll-off.
With the Slow Roll-off, one can see the frequency curve drops smoothly. The sound is more
open, the extension of low and high is better.
USB Settings：
There are three options: Storage, DAC, and Charge Only.
(1). Storage.
Allows the DX90 to be used as an external drive. Please see page8 "Connecting to a
computer for data transmission", regarding to how to transfer data into the DX90.
(2). DAC.
Allows the DX90 to be used as a USB-DAC.
(3). Charge Only.
With this option, the computer would charge the DX90 when the DX90 is connected.