What purpose does the 'Mix' control serve in the S6000?

The 'Mix' control in the S6000 is designed to adjust the balance between processed and unprocessed signals. This allows users to blend the effects of processing applied to the audio with the original, dry signal. By manipulating the Mix control, one can achieve a desired level of effect integration, creating nuances in the sound without completely eliminating the original audio. This feature is crucial for achieving a natural-sounding effect, especially in scenarios where maintaining some characteristics of the original signal is important for the overall mix.

In contrast, adjusting overall volume or modifying the input gain does not directly involve blending processed and unprocessed signals. Similarly, controlling frequency response pertains more specifically to EQ adjustments rather than the blending of effects in a mix context. Therefore, the Mix control's primary role in balancing processed and unprocessed signals is what sets it apart as the correct answer.