Output Issues

I cannot change the volume of my computer speaker. (Windows)

Even when I'm not speaking into the microphone (MIC), the talk over function is sometimes activated and the master sound volume is reduced.

Audio skipped or dropped out when Beat FX is applied to MASTER or MIC when using rekordbox.

Even though the unit is connected to my computer, only the stereo 1 channel can be used.

The output sound sometimes becomes smaller.

Sound from the microphone is distorted.

Audio distortion, glitches, clicks, dropouts or noise.

Sound is distorted when an analog player is connected to this unit’s [LINE/PHONO] input terminal. Or, the lighting status of the channel level indicator does not change even when the [TRIM] control is turned.

Sound distortion occurs.

When I change the tempo with the master tempo turned on, the sound seems distorted. Is this a malfunction?