Transcript Sound and Music Powerpoint

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The hardware, software and
techniques used for sound
MP3 players:
• play music files stored
digitally in MP3 file
format
• are small and portable
• can store thousands of
music tracks
• are now part of many
mobile phones.
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Sound cards
• Circuit boards
containing chips and
other components.
• Allow high quality
music/sound to be
produced.
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Microphones
• are input devices
• used to enter voice,
sounds, live music,
etc.
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Speakers and headphones
• are output devices
• used to output the
sound/music after
processing by the
computer.
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MIDI
Musical Instrument Digital Interface
• allows musical instruments to
transfer music to a computer
• where it can be edited and
stored
• MIDI can play back the stored
music using the device used to
create it
• keyboards use MIDI.
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Sound conversion (analogue to
digital and digital to analogue)
• Sound is an analogue signal
(i.e. constantly varying).
• Nearly all computers process
digital data.
• The analogue sound needs to
be converted (i.e. digitized).
• An analogue-to-digital
converter is used.
• To play back the music, the
digital data is converted to
analogue using a digital-toanalogue converter.
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Analogue to digital and digital to
analogue conversion
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Sequencers
• Hardware or software
used to manage music.
• Drum machines are an
example – they play a
series of note in a set
order automatically.
• Music workstations can
also provide
sequencers.
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Notators
(music composition software)
• Software that allows
you to compose your
own music.
• Enter notes into the
computer via the
keyboard, a MIDI
system or scanning a
piece of music on
paper using a scanner.
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Sound wave editors
• Allows sound waves
to be altered.
• You can alter, cut,
paste and have
effects such as echo,
amplification and
noise reduction
applied.