Creative E-MU Digital Audio System 1820M - I;O Settings

4 - The PatchMix DSP Mixer
The Session
E-MU Digital Audio System 31
I/O Settings
You can set the level (-10dBV or +4 dBu) for each pair of analog outputs and the input
gain setting for each pair of analog inputs.
An output setting of +4 provides the most output and is compatible with professional
audio gear. Balanced output cables provide a +6dB hotter signal than unbalanced cables
when used with balanced inputs. Do NOT use balanced cables unless your other gear
has balanced inputs. See “Cables - balanced or unbalanced?” in the Appendix for more
information.
An input setting of -10 is compatible with consumer audio gear and works best with low
level signals. (-10dBV is approximately 12dB lower than +4dBu.) Choose the setting that
allows you to send or receive a full scale signal without clipping.
Setting correct input and output levels is important! You can measure the level of an
input by inserting a meter into the first effect location in the strip. Adjust your external
equipment outputs for the optimum signal level. See “To Set the Input Levels of a Strip”
for details.
f Input too weak?
Use -10 Input setting.
Output too weak?
Use +4 Output setting
Consumer
Headroom
Headroom
Professional
+20 dBu
+8 dBu
+ 6 dBV
+4 dBu
+ 2 dBV
-8 dBu
=
=
=
-10 dBV
{
}
Clipping -->
<-- Clipping
(balanced)(unbalanced)
Comparison of -10dBV & +4dBu Signal Levels
0 dBV = 1V RMS 0dBu = .777V RMS
Output Level
Settings
Input Level
Settings
E-MU 1010
Optical
Output Select
E-MU 1010
Optical Input
Select
S/PDIF
Output
Format Select