Transcript Audio_production_in_..

Audio production
in a video project
Markus Saarinen
Seminaariesitys
17.2.2011
Contents
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Audio in general
Planning and pre-production
Field recording
Post-production
Summary
Bonus
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Audio in general (1/2)
• Born when an audio source vibrates
• Frequency = the amount of pressure vibrations in a certain
timeframe  Hz
• Sound intensity, logarithmic scale (dB)
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Audio in general (2/2)
• Why to invest in audio?
– creates atmosphere
– Helps with telling the story
• audio is videos best friend
• rhythm, continuity
– dialogues
• Problems…
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presumption of good sound
not invested enough
not given a chance for planning
time/money
shooting not done with audio in mind
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Planning and pre-production
• What are we doing?
– script
– dialogue, music, effects, ambient noise
• Preparation and neccessary items
– mics, mixers, cabling… aikataulutus
– the set
• making the shooting plan
• acoustic problems?
• Budjeting?
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Field-recording (1/2)
• Microphones
– Condenser, dynamic, electret
– Booming (shotgun)
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directional
close to the source
handling, stamina
consider spaces and view angles/perspectives
– Lavaliere
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wired or wireless
close to the source
decide if visible or hidden
consider motion (head/clothing)
smaller size, more noise
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Field-recording (2/2)
• Audio recording
– Sampling frequency and bit depth
• CD-quality 44,1 kHz
• DVD-quality 48 kHz
• 16 bit, 24bit
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dialogues primary
clapper board
Spatial sound, ambient audio scenery?
levels good to keep in mind
• 6dB
• Notes
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Post-production (1/4)
• Workflow
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synchronizing dialogues
dialoge-cut
ADR –automated dialogue replacement (post-recording)?
effects
music, atmospheric sound
processing and effects
mixing
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Post-production (2/4)
• Tools
– studio
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software
good studio monitors
sound card
acoustics
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Post-production (3/4)
• Equalization (EQ)
– Frequency correction
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Post-production (4/4)
• Compression
– restricting sound dynamics
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Summary
• Audio does’nt just appear
– planning!
• Know what you’re doing
• Give time! (editors, directors)
• Dialogue most important in the field!
– Don’t forget ambience/sfx
• Quality! minimun 48kHz, 16bit
• Process at the latest possible time
• Invest in mixing
– Last place to fix things and make a difference
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