Cabling and phantom power
Signal processing and special effects
PC card and CD-R recorders
Hard disk recorders
Improving audio digitization
Analysis and Delivery
Preparing files for analysis and delivery
LPC in acoustic analysis
Audio Technology / Recording / Pre-amplifiers...
The main function of a pre-amplifier is to accept a very low-level signal
(such as that from a microphone) and amplify it without adding noise.
Good pre-amplifiers are not easy to build, as they have to be immune to
all kinds of potential noise and signal distortion. It is, therefore,
important to use the best possible pre-amplifier, particularly one that
has a fairly high gain, broad dynamic range, high SNR, phantom power,
and balanced XLR inputs. Good field pre-amplifiers are particularly hard
to find. Sound Devices MP2, USB Pre, and Shure FP 23 (PHOTO>>)
are among some of the best, yet affordable field pre-amplifiers. The gain
on the pre-amplifier should be set relatively high, but the speakers
voice amplitude range should be tested first to avoid signal overload.
If intensity measurements are not indented, a soft compressor-limiter
may be used to maximize amplitude and help prevent signal clipping.