Shared Flashcard Set

Details

MSV2
Analog Vs. Digital
9
Music
Undergraduate 3
05/16/2007

Additional Music Flashcards

 


 

Cards

Term
Sample Rate
Definition
1. Snapshots per second
2. Measured in Hertz (Hz)
Term
OVER-SAMPLED
Definition
SAMPLED MORE THAN 2X PER CYCLE
Term
CRITICALLY-SAMPLED
Definition
SAMPLED EXACTLY 2X PER CYCLE
Term
UNDER-SAMPLED (aliased)
Definition
* SAMPLED LESS THAN 2X PER CYCLE
(Aliasing occurs when sample rate is too low.)
Term
Aliasing
Definition
makes high frequencies appear as low
frequencies

Aliasing occurs above the Nyquist Frequency.

In order to eliminate aliasing, a low pass
filter (LPF) is put before the A-to-D
conversion stage at the Nyquist Frequency.
Term
Nyquist Theorem:
Definition
The sampling rate must be
≥ 2X the highest recorded frequency in order
to avoid aliasing.
Term
Nyquist Frequency
Definition
1/2 the Sampling Rate
Term
Bit Depth
Definition
1. Number of bits stored
per sample

2. Describes possible
volume values

3. Bit = ON/OFF switch
a. 1 = ON
b. 0 = OFF
Term
Quantization
Definition
1. Volumes are adjusted up or down to the nearest volume value in digital audio.
Supporting users have an ad free experience!