ESI Waveterminal U2A - Manual (Page 19)

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3. USB WAVE OUT
Output of wave device selected to USB Aduio Device is
routed to the Digital Output port for monitoring.
M I X M O D E
When more than one output source is selected to be played back
simultaneously in the Analog or Digital Out Mixer, you are actually
combining the data of two digital audio signals together, resulting in an
overall gain of about 6dB/bit for each signal combined. This can cause
the output circuit to overload and create a noticeable click or
distortions as the combined level can exceed 0 dB peak level. Mix
Mode gives you the choice as to how such excessive levels are
handled by U2A.
1. DYNAMIC
The combined signal levels are not adjusted by U2A. In this
mode clipping signals are audible, but left untouched. If you
want to adjust the levels, you can do so by adjusting the levels
from the audio software or by manually reducing the output
level faders of U2A.
2. SOFT
The combined signal levels are reduced automatically by U2A,
depending on the number of signal sources combined. For two
combined signals, the output signal is reduced by –6 dB.
If output monitoring sources don’t contain peak level (0 dB peak)
programs, combining them probably would not cause any clipping or
distortion. In such cases, you may opt for the Dynamic mode, as it will
allow you to add the signals for a much ‘hotter’ output. On the other
hand, if your sources already contain peak level programs, you may
need to select the Soft mode or manually adjust the levels of each
output source you have selected.