Audio / Video for
Slidecasts &
Podcasts
Giving Life to
Online 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 so...
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 ...
The Sound Source
Ambient Noise
“The pervasive noise associated
with a given environment, being
usually a composite of soun...
The Sound Source
We have an amazing amount of
ability to mentally filter out
ambient noise
wind, traffic, refrigerator hum...
The Sound Source
Ambient noise we can sometime
filter out in post-production
Typically when it is a consistent
frequency
I...
The Sound Source
Problem:
Excessive environmental ambient
noise
background, traffic, wind, flags
Solutions:
Different envi...
The Sound Source
Problem:
Excessive environmental transient
noise
dogs, sirens, aircraft, frogs
Solutions:
Be aware of tra...
The Sound Source
Problem:
Building and machinery noise
HVAC, refrigerator, elevators,
clocks, computer fans, light ballast...
The Sound Source
Problem:
Talent & crew noise
fidgeting, clothing noise, mouth
sounds
Solutions:
Train crew to be quiet
Av...
The Sound Source
Problem:
Sound & video gear
crackles, ground loops, camera noise,
microphone pops, wind noise, phones
Sol...
The Sound Source
Problem:
Lost or bad sound
microphone or recorder batteries
dead, cable loose or unplugged, etc.
Solution...
The Sound Source
Movie★Slate
This iPhone / iPad app is a bit
expensive ($19.95), but very useful
Sync multiple audio sourc...
The Sound Source
Reference Headphones
Use your headphones – many
problems you’ll not spot unless
you use them
Anything is ...
Questions?
Feedback?
ChristopherA@LifeWithAlacrity.com
Upcoming SlideShare
Loading in...5
×

Sound (Excerpts from Summer A/V Workshop)

1,458

Published on

Published in: Technology, Business
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
1,458
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Transcript of "Sound (Excerpts from Summer A/V Workshop)"

  1. 1. Audio / Video for Slidecasts & Podcasts Giving Life to Online Media July 24, 2010
  2. 2. The Signal Path
  3. 3. 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
  4. 4. Signal Path
  5. 5. The Sound Source
  6. 6. 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
  7. 7. 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.”
  8. 8. 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 licensed CC-BY-NC
  9. 9. 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 licensed CC-BY-NC
  10. 10. 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
  11. 11. 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 licensed CC-BY-NC
  12. 12. 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 licensed CC-BY
  13. 13. 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
  14. 14. 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 licensed CC-BY
  15. 15. 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
  16. 16. 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
  17. 17. 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
  18. 18. Questions? Feedback? ChristopherA@LifeWithAlacrity.com

×