I once had a film cameraman tell me that sync was not important only to get a call later to fix his production. That was many years ago when audio was recorded on a medium called magnetic tape or film. Remember? Now it’s all digital. I really thought that digital audio would resolve issues but now there are a few more details to consider.
Digital audio is recording in slices or audio samples regular time intervals. This is called the sampling rate. The standard for recording digital audio for picture is 48 thousand times per second or 48K. The 48K rate is used because it is mathematically compatible to picture formats. If there is a variance in the audio sampling rate then the sound can drift in relation to the picture and create chaos in the editing room. Even minor drifts can create problems. Basically there will be more or too little audio for a given scene. I am pretty sensitive to this and I see one or two TV commercials weekly with bad lip sync.
Here are some common causes of drifting audio:
- The recording was made at the wrong sample rate, not at 48K sample rate.
- Multiple cameras and audio recorders and no external master sync source.
- No time code is used.
- Delay induced by a digital console without external sync.
- A mistake in the editing room.
- An unexpected equipment failure.
We all know things go wrong so some proper planning and redundancy may save the day. Always test your setup before recording the final product. Digital recording does not mean good recording. I have had to fix many digital recordings that were noisy or distorted. After you do a test recording make sure your location sound man listens to what is being recorded in headphones and listens to the recording of each scene after a take.
If problems do arise, the drift may be resolved by adjusting the playback to match the picture in an audio post house or editing room. Some productions require frame accurate recording and this adjustment is not acceptable if there is budget to re-shoot the scenes. Happy shooting and may the sync be with you.

llowed us to communicate with others. Outside of the occasional thunderclap, things were pretty darn quiet for a long while. But something happened when first, gunpowder, and then, the industrial revolution, arrived: LOUD NOISES. If you use your hearing for business, as I do, or just for things like hearing the beautiful sounds of nature, you might want to do everything possible to keep them healthy.

SoundWorks adds a new DO
Published January 20, 2010 Advertising , Software , TV Commercial , audio , audio production , commentary , social media , talent , technology , video production 3 CommentsTags: Dee Oberle, new addition, new employee, Sound Works, Soundworks
SoundWorks is beginning the year with new audio talent. We are committed to continually building our team with fresh ideas and great skills.
SoundWorks welcomes Dee Oberle to our staff. Dee brings her expertise in audio engineering–specifically post-production, video game development, live production, and video editing —in addition to knowledge in a variety of software applications to our vivid mix.
Like many people in the industry, Dee was inspired to pursue a career in audio after working with the sound team in her junior high youth group. She jumpstarted her career by receiving training from veteran engineers at Madison Media Institute.
On staff at Post Effects/Answers Media, Dee worked alongside Halo Composer, Mike Salvatori, on a series of projects including podcasts for Accenture and redesigning the audio on the Wide Load logo.
Dee’s audio portfolio with Dallas Audio Post Group includes Foley for Catacombs: Directors Cut, editing for educational company Voyager Learning, and third party post-production support on Brothers in Arms: Earned in Blood.
As a sound designer, Dee worked with Gearbox Software under the direction of internationally acclaimed composer for Doom III and the Brothers in Arms Series, Ed Lima. She earned a credit on the AAA title Brothers in Arms: Hell’s Highway. Other products developed at Gearbox include: Borderlands and several yet to be released projects.
Additional work as freelancer includes the Lil’ Flip- Kim Kardasian video shoot, worship services at Willow Creek Community Church, TV Man, Inc. and several short films.
Software expertise:
Please leave Dee a welcome comment below or welcome her in person at the next Sound Works mixer coming soon.
###