ESI Waveterminal U2A - Manual (Page 20)

2 0
S A M P L E R A T E
Sample rate determines the number of samples per second that is used
to convert analog audio to digital audio.
As most of you may know, sample rate for CD-DA is 44.1kHz and
professional digital audio masters are usually recorded at 48kHz
sample rate. U2A may be used to sample analog audio at 48kHz, but
at some point in time it must be converted down to 44.1kHz for it to
be used in a viable consumer format, such as CD-DA. Once you
convert (dither) the data down to a lower sample rate format, you will
experience some losses in frequency response. However, analog
audio recorded with higher sample rate and bit resolution will sound
cleaner and retain more accurate frequency response when they are
dithered down to lower bit rate or converted to lower sample rate.
1. AUTO
Sample rate is automatically set by the selection you make in
your digital audio recording software during analog audio
recording or by the encoded signal format during digital audio
recording.
2. SAMPLE RATE
There are three different sample rates available – 32kHz,
44.1kHz and 48kHz. If you want to convert sample rate in
real time, you can select desired sampling rate among them.
R E A L T I M E S A M P L E R A T E C O N V E R T E R
U2A can function as a real-time sample rate converter. This is U2A’s
unique function that you cannot find from any other digital audio
interface. You can change the incoming digital signal to a different
sample rate by choosing Internal word clock and selecting a desired
sample rate. The maximum conversion ratio is 3:1, so if your input
signal’s sample rate is 96kHz, you can convert it down to 32kHz
(96/3) or convert 11kHz signal up to 32kHz (11x 3). Real Time
Sample Rate Converting functions only for incoming digital signal.
Connect digital source to Coaxial/Optical Input port and choose