1) Question 1
Ø Audio waveform (definition/ describe)
Waveform means the shape and form of a signal such as a wave moving in a solid, liquid or gaseous medium.
Ø Sound characteristic (what is the importance?)
Properties of sound waves:
o Wavelength
The distance between any point on a wave and the equivalent point on the next phase. Literally, the length of the wave.
o Amplitude
The strength or power of a wave signal. The "height" of a wave when viewed as a graph.
o Frequency
The number of times the wavelength occurs in one second.
o Velocity or speed
The speed or velocity in air and other gases depends on temperature.
Ø Digitization audio signal
This term consists of two steps :
· Sampling – Measure the signal values at discrete intervals
· Quantization – Restricting the value to a fixed set of
levels.
· Done by ADC = analogue to digital converter.
· DAC - digital to analogue converter the conversion of digital audio to a line level signal for playback or distribution.
Ø Audio compression (lossy/ lossless) (Mp3/ FLAC)
Lossless Compression:
FLAC - Free Lossless Audio Codec
· does not remove any information from the audio stream
· suitable both for everyday playback and audio archival
Lossy compression
· used in applications like MP3 players or computers, digitally compressed audio streams used in video DVDs; streaming media on the internet; satellite and radio broadcasts.
Ø What do you do during pre-production/ post production?
NO ANSWER YET
2 comments:
Err, for those who gt the audio notes folder from dahlan inside there is a microsoft word with the name "pre-production" inside can fid the answer of "pre-production' but dun hv post production
ya, i got liao... the new answers in the above document
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