Glossary of terms
ASYNCHRONOUS
An asynchronous USB DAC uses its own clock to regulate the
data rate from the computer, which allows for jitter-free data transfer
PLL
Phase lock loop
PCM
Pulse code modulation
SPDIF
Sony Philips digital interface protocol
SOFT MUTE
Software mute (not output mute)
SOFT KNEE FILTER
Filter with a large transition band which reduces dispersion and delay
HALF BAND
Filter where the transition region is centred at one quarter of the
sampling rate
APODISING FILTER
Filter exhibiting a smooth roll off
BRICKWALL FILTER
Filter exhibiting a steep roll off
FLAC/ALAC
Examples of lossless audio formats
DIGITAL FILTER
Device or process that removes unwanted features from a signal.
11