1. A measurement of amplitude (volume) at a
given point in time
2. How frequently you take the samples
3. Hertz (1 Hertz is equal to 1 measurement per second)
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What is the bit depth or resolution ?
Bit depth determines the accuracy of the amplitude measurements by increasing the range of values per sample.
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How do you calculate file size ?
File size = sample rate (in hertz) * bit depth * length of the audio (in seconds) * the number
of channels
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What are the four steps of 'Analogue to digital conversion (ADC)'
1. Microphone measures change in air pressure
2. Microphone translates air pressure
into electrical voltage
3. Analogue to Digital Converter digitises the electrical voltage to bytes of information (binary)
4. Computer stores and displays the digitised s
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What is 'Nyquist's theorem' ?
For an accurate recording, the sampling rate must be at least double that of the highest frequency (or pitch) in the original signal
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What is 'MIDI (Musical Instrument
Digital Interface)' ?
A standard that describes a protocol which allows electronic musical instruments to communicate with computers. It does this by sending 'event messages' to the computer when a key is pressed. They contain things like pitch, duration, velocity, etc
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Other cards in this set
Card 2
Front
What is the bit depth or resolution ?
Back
Bit depth determines the accuracy of the amplitude measurements by increasing the range of values per sample.
Card 3
Front
How do you calculate file size ?
Back
Card 4
Front
What are the four steps of 'Analogue to digital conversion (ADC)'
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