Extreme Signal Distortion and DCA Fader Failure on Behringer WING Rack

Dear Behringer Team,

I am writing to report a recurring and critical malfunction with my WING Rack mixer. The issue involves the audio signal undergoing extreme distortion and a subsequent failure of the DCA fader control, which I believe represents a serious reliability concern.

My System Configuration:

• Mixer: Behringer WING Rack

• I/O Box: Midas DN4816-O

• Audio Source: Windows PC via USB Audio

• Software Driver: VoiceMeeter, used as a 7.1 virtual interface because the native WING driver is not recognized as a multi-channel device in Windows.

• Control Setup: A single DCA fader is assigned to control the levels of all 7.1 Matrix outputs feeding my studio monitors.

Description of the Malfunction:

The incident has happened twice while playing standard audio from a web browser. On both occasions, the following occurred:

The audio content I was playing was suddenly output at an extreme volume and with such severe, overwhelming distortion that it became an unrecognizable and piercing, high-frequency noise. To be clear, it was not random static; it was the original audio, but distorted to an extreme degree.

My attempts to control the volume with the assigned DCA fader led to these failures:

• Incident 1: The DCA fader had no effect on the volume level. The only way to silence the output was to pull the fader to its absolute minimum position, negative infinity (-∞).

• Incident 2: The situation worsened. During a subsequent event, the DCA fader was completely unresponsive. Even pulling the fader to negative infinity did not cut the sound. I was forced to perform an emergency restart of the entire WING Rack to stop the noise.

Analysis and Core Concern:

I have thoroughly checked my routing, and it is correct and functions as expected under normal conditions. This leads me to believe the fault is not a user error but a significant internal software or DSP glitch.

My primary concern is the failure of the DCA, which should be a reliable digital control. I suspect this could be caused by a massive internal floating-point gain error. It's conceivable that an internal process is applying so much gain to the original signal that it results in extreme digital clipping, and the signal becomes so large that the DCA's standard attenuation range is ineffective.

This is an incredibly alarming issue. If this malfunction were to occur on a large-scale PA system at a live event, it would be a catastrophic failure. It would create a dangerous and unacceptable experience for the audience and completely undermine the professional usability of the mixer.

Given the severity of this bug and the potential for failure in a live environment, I request that you investigate this matter with urgency.

Thank you for your attention.