Multimedia Production

MULTIMEDIA PRODUCTION 4(1+3)

Lesson 13: Multimedia Building Blocks - Audio

Recording audio files

Recording Audio Files on the PC uses either:

1. Microphone by connecting it the microphone port and record using sound recorder
2. CD-ROM Drive : Move music files from CD to hard drive or; Play the CD and then record using the sound recorder. Line-in pressing play on the audio source, which is connected to the computer’s audio line-in socket.
   

Digital Audio

• Digital audio data is the representation of sound, stored in the form of samples point. Quality of digital recording depends on the sampling rate, that is, the number of samples point taken per second .
• The three sampling frequencies most often used in multimedia are 44.1 kHz, 22.05 kHz and 11.025 kHz. The higher the sampling rate, the more the measurements are taken (better quality). The lower the sampling rate, the lesser the measurements are taken (low quality).