2.1 Understanding Digital Audio

A process wherein sound in an analog form is converted into digital form. It starts with equipment like microphones and amplifiers, which capture sound from an analog source.

• Digitization

• Conversion

• Sampling

• Audio Coding

The main device for digital recording.

• ADC

• DAC

• MP3

• WMA

Playing sound involves

• speakers

• DAC

• both DAC and speakers

• none of the choices

It captures the electric currents with information and converts it into digital numbers known as a sample

• ADC

• DAC

• MP3

• WMA

The digital number from electric currents in a recording.

• Sample rate

• Sample

• Sample format

• Sample size

It shows how many bits per sample were recorded. The more bits recorded, the more accurate the sound will be played back.

• Sample

• Sample rate

• Sample size or Sample format

• Digital audio

It is measured in Hz; it is how fast samples are captured.

• Sample

• Sample rate

• Sample size

• Sample format

Developed by Microsoft, it is supported by most home entertainment and media players, but only a few mobile devices.

• DAC

• MP3

• AAC

• WMA

Made by Apple iTunes, it has a format similar to MP3 but more efficient. It is mostly accepted by iOS, Android, and gaming devices.

• DAC

• MP3

• AAC

• WMA

The most widely available and supported audio file type. It has smaller file sizes, and faster transfer and download rates.

• DAC

• MP3

• AAC

• WMA