Lesson 3 - Introduction - Digital Audio Basics - Posted on 2013-08-21 by Natasha Turner

Hey, Pierce and I reviewed Digital Audio Basics.

We concluded that the number of measurements taken from an analog signal in one second is the sampling rate.

Also, we discussed how one get an alias frequencies, when we allow frequencies that are twice our sample rate to enter sampling procress.

Furthermore, we reviewed what "quantization" is; the way DAW (Digital Audio Workstation) records the volume component of the digital recording or sampling process.

On the other hand, "dither" is applied to the process to reduce quantization errors and increase in noise and/or fuzziness that could creep into a bitstream to make it sound more natural.

Next we explained the Nyquist Theorem, which is a sampling process. If one wanted to encode the frequency bandwidth in the digital domain the chosen sample rate would have to be at minimum double the height as the greatest frequency that was going to be recorded.

Furthermore, we went over the use of a "binary number system" which is the basic theory of digital audio processed, stored, and reproduced over time.

Then we concluded that MP3 is the most popular kind of compression format for e-mailing audio.

Lastly, we discussed when one is to minimize the size up to 10 percent when ripping a CD to MP3.

Cheers,

Natasha Turner