BAB 7 - SOUND

Sound is

• Vibrations in the air create waves of pressure that are perceived as sound

• Sound waves vary in sound pressure level (amplitude) and in frequency or pitch.

• Sound waves equal in sound pressure level (amplitude) and in frequency or pitch.

• Vibrations in the water create waves of pressure that are perceived as sound

What is the branch of physics that studies sound.

Sound pressure levels (loudness or volume) are measured in

• posibel (pB)

• desibel (dB)

• vibrate (vT)

• dasible (dD)

The quality of digital recording depends on the

• sampling rate

• vibrate

• frequency

• all the answer

The three sampling frequencies most often used in multimedia are CD-quality except

• 44.1 kHz

• 22.05 kHz

• 11.025 kHz

• 30.04 kHz

Crucial aspects of preparing digital audio files are

• Balancing the need for sound quality against available RAM and hard disk resources

• Setting appropriate recording levels to get a high-quality and clean recording

• Cleaning appropriate recording levels to get a high-quality and clean recording

• Identify the problem for sound quality against available RAM and hard disk resources

Select the BASIC sound editing operations

• trimming

• splicing and assembly

• volume adjustments

• working on multiple tracks

Size of a monophonic digital recording

• sampling rate x (bit resolution/8) x 1

• sampling rate x (bit resolution/8) x 2

• sampling rate x (bit resolution/6) x 1

• sampling rate x (bit resolution/6) x 2

Size of stereo recording

• sampling rate x duration of recording in seconds x (bit resolution/8) x 2

• sampling rate x duration of recording in seconds x (bit resolution/8) x 1

• sampling rate x duration of recording in seconds x (bit resolution/8) x 3

• sampling rate x duration of recording in seconds x (bit resolution/6) x 1

MIDI stand for

• Musical Instrument Digital Internet

• Musical Instrument Digital Interface

• Moving Instrument Digital Interframe

• Musical installment Digital Internet