ESI Waveterminal U24 - Manual (Page 36)

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3. USB WAVE OUT
Output of wave device selected to USB Audio 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 U24.
1. DYNAMIC
The combined signal levels are not adjusted by U24. 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
U24.
2. SOFT
The combined signal levels are reduced automatically by U24,
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.