PreSonus Inspire 1394 - Manual (Page 32)

TECHNICAL INFORMATION
32
Amplitude- The v
oost- A +20dB mplifier, allowing you to amplify a low level input
mpletely to the left when
caution when engaging
see Limit).
rs or
while adjusting gain to be sure that you are not clipping the input. Using a limiter will
olume of a signal, usually measured in decibels (dB).
boost is built into each prea B
signal enough to be recorded. You should have the gain knob turned co
ou engage the boost, and then adjust the gain higher from there. Exercise y
the boost, as your input will be much louder with the +20dB boost engaged.
Clip, Clipping- Clipping occurs when an input level exceeds the maximum level allowed by the
preamp. This is heard as harsh distortion and should be avoided as it can sometimes cause damage
o speakers or headphones. A limiter can be used to aid in preventing clipping ( t
Feedback- This is commonly the result of an input being fed into itself, as with the case of a
microphone placed in front of the speakers it is outputting from. This creates a loud, uncontrolled
ignal, often very high pitched, and can cause damage to your ears as well as your speake s
headphones. Be very careful to avoid creating feedback when using microphones near any output
device.
Gain- Increasing gain will amplify your input signal. The goal should be to set the gain as high as
possible without clipping the preamplifier or the input in your software. Look at the meters in your
oftware s
sometimes assist in this process (see Limit).