Intro to Digital Audio

What travels through air at 343 meters per second?

• A radio wave

• Light

• A sound wave on a dry day at 20 degrees Celsius

• Electricity

What does a dynamic microphone use to convert sound into an electrical signal?

• A diaphragm attached to a coil and magnet

• A battery

• A laser beam

• A silicon chip

What is necessary to accurately capture high-frequency sounds?

• Sampling at least twice per cycle

• Higher amplitude

• Lower bit depth

• Decreasing the sample rate

What does the bit depth in digital audio determine?

• The precision of loudness levels

• The loudness of the recording

• The size of the audio file

• The speed of playback

Which format is known for lossy compression?

• LPCM

• MP3

• AIFF

• WAV

What does a shorter wavelength sound like?

• higher pitch

• lower pitch

Why would you want to increase the sample rate?

• higher quality audio

• faster wavelength

• to capture higher sound frequencies

• slower wavelength

A higher sample rate provides high quality audio, but it also makes the file size (a)   .

Most digital audio applications use a bit depth of (a)   bits.