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Sound (Excerpts from Summer A/V Workshop)

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    Sound (Excerpts from Summer A/V Workshop) Sound (Excerpts from Summer A/V Workshop) Presentation Transcript

    • Audio / Video for Slidecasts & Podcasts
      Giving Life toOnline Media
      July 24, 2010
    • The Signal Path
    • The Signal Path
      The Signal Path (or Chain)
      The steps the sound must pass through to be played to your viewers
      the sound source
      the microphone
      the connectors
      the mixing and routing
      the digital recorder
      the digital compression
      The Signal Path is only as strong as its weakest link
      photo credit: Paul Graham Raven on Flickr licensed CC-BY-NC-SA
    • Signal Path
    • The Sound Source
    • The Sound Source
      The Sound Source
      Best place to avoid poor sound quality
      Often the easiest overlooked
      The least expensive solution
      Listen first!
      photo credit: Maccio Capatonda on Flickr licensed CC-BY-NC-SA
    • The Sound Source
      Ambient Noise
      “The pervasive noise associated with a given environment, being usually a composite of sounds from sources both near and distant.”
    • The Sound Source
      We have an amazing amount of ability to mentally filter out ambient noise
      wind, traffic, refrigerator hum, light ballast buzz, computer fans, etc.
      As recording engineers we have to learn how to stop our filters and listen again
      photo credit: Barking Tree Frog by Brian Gratwicke on Flickr licensedCC-BY-NC
    • The Sound Source
      Ambient noise we can sometime filter out in post-production
      Typically when it is a consistent frequency
      It can be useful to record a few seconds of “silence” with each shot to capture a “reference sound level”
      This can be used later to help eliminate ambient noise, or to cover up sounds
      Professional recording engineers also record a reference tone
      photo credit: Barking Tree Frog by Brian Gratwicke on Flickr licensedCC-BY-NC
    • The Sound Source
      Problem:
      Excessive environmental ambient noise
      background, traffic, wind, flags
      Solutions:
      Different environment
      Different time of day
      Close curtains
      Remove hard furniture
      Soften walls or ceilings
      Reposition microphones
      photo credit: LakeWentworth on Flickr licensed CC-BY-NC
    • The Sound Source
      Problem:
      Excessive environmental transient noise
      dogs, sirens, aircraft, frogs
      Solutions:
      Be aware of transient changes and re-record
      Wait it out
      Different time of day
      Buy the landscaping crew an early lunch
      photo credit: Barking Tree Frog by Brian Gratwicke on Flickr licensedCC-BY-NC
    • The Sound Source
      Problem:
      Building and machinery noise
      HVAC, refrigerator, elevators, clocks, computer fans, light ballast hum
      Solutions:
      Different time of day
      Know where the HVAC controls are
      Run HVAC hard then turn off
      Muffle vents
      Turn off & unplug equipment and lights
      Signage “Quiet Please!”
      photo credit: RomulusNR on Flickr licensedCC-BY
    • The Sound Source
      Problem:
      Talent & crew noise
      fidgeting, clothing noise, mouth sounds
      Solutions:
      Train crew to be quiet
      Avoid walking to avoid both creaky floors and creaky squeaky shoes
      Avoid noisy cloth, in particular silk, rayon, corduroy, especially on talent
      Readily available water between takes & green apple slices to avoid mouth noise
      photo credit: Diamond Geezer on Flickr licensed CC-BY-NC-ND
    • The Sound Source
      Problem:
      Sound & video gear
      crackles, ground loops, camera noise, microphone pops, wind noise, phones
      Solutions:
      Mark and discard bad cables
      Use balanced gear (see upcoming slides)
      Don’t use camera microphone
      Be aware of microphone placement
      Use a zeppelin or windsock on mike
      Turn off or Airplane mode phones
      photo credit: RomulusNR on Flickr licensedCC-BY
    • The Sound Source
      Problem:
      Lost or bad sound
      microphone or recorder batteries dead, cable loose or unplugged, etc.
      Solutions:
      Double-check!
      Tape everything down
      Backup with Additional recorder
      “Plant” a digital recorder as a backup
      Use iPhone Movie★Slate to sync
      photo credit: tjmasiakowski on Flickr licensed CC-BY
    • The Sound Source
      Movie★Slate
      This iPhone / iPad app is a bit expensive ($19.95), but very useful
      Sync multiple audio sources
      If you keep volume of iPhone same, good reference tone
      Accurate time
      Good for making sure you have notes on all of your shots
      But remember turn on Airplane Mode!
      photo credit: PureBlend Software Movie★Slate
    • The Sound Source
      Reference Headphones
      Use your headphones – many problems you’ll not spot unless you use them
      Anything is better then nothing
      But if you buy a good pair, you want“flat response”
      photo credit: Dale Gibert Jarvis on Flickr licensed CC-BY-NC-SA
    • Questions? Feedback?ChristopherA@LifeWithAlacrity.com