Digital Audio Flashcards
What is the AES/EBU digital audio interface also known as?
AES3.
What does EBU stand for?
European Broadcast Union.
What is lightpipe?
A popular type of fiber-optic connection becoming a standard for digital audio transfer.
The latest generation of A/D converters use:
24bit/192kHz converters.
What is S/PDIF?
Consumer standard also known as the Sony/Phillips Digital Interface Format.
What does TDM stand for?
Time Division Multiplexing.
What is AIFF?
A Macintosh and Windows computerbased Audio Interchange File Format.
What does ADAT stand for?
Alesis Digital Audio Technology.
What does SDIF stand for?
Sound Description Interchange Format.
What are some advantages of recording and editing in the digital realm? (3)
Non-destructive editing.
Noise reduction.
Flexibility.
Describe the relationship between sample rate and frequency response of digital audio.
The sample rate required for digital audio is driven by a fundamental law of A/D conversion, referred to as the Nyquist Theorem. It states that in order to produce an accurate representation of a given frequency of sound, each cycle of a sound’s vibration must be sampled a minimum of two times, otherwise aliasing will occur. Because the range of human hearing is generally accepted to be 20Hz-20kHz, this law indicates that a sampling rate of at least 40kHz is required to capture full-frequency audio. Increasing the sample rate will increase the frequency response.
Describe the relationship between bit depth and dynamic range in digital audio.
Bit depth determines the dynamic range of digital audio. By multiplying the bit depth by six, you can estimate the useful dynamic range of the system in dB. Therefore, the greater the bit depth, the greater the dynamic range.
What is the binary word length also commonly referred to as?
Bit depth.
In theoretical terms, by how much does the dynamic range (or signal-to-quantization noise ratio) increase by for each bit added to the binary word length?
6 dB.
