Practical Sound Recording and Editing Techniques For Better Video

Here are some resources associated with my session, “Practical Sound Recording and Editing Techniques For Better Video” recently given at the 4th Annual New Media Expo held in Las Vegas.

Presentation Slides

Here’s a copy of my presentation slides, available in two flavors.

Sound-Better-Video-4NME.pdf
A PDF of the presentation slides (34MB).

Sound-Better-Video-4NME-Notes.pdf
A PDF of notes to accompany the presentation slides (236K).

Dialog audio clips

The following files are available for download as a zip archive: dialog.zip (8.7MB)

David-123.wav
Recording made with an RE50 omnidirectional, handheld microphone, from three distances, 1 foot, 2 feet, and 3 feet. Note how the audio level falls off dramatically as we move farther away from the source, there’s also some background noise.

David-123-levelator.wav
The above recording processed with Levelator, notice how bringing up the level of the second and third recordings brings up the noise level too. Keeping the mic close the source keeps the level of the voice well above the room noise. The farther away the mic, the less difference between the dialog level and room noise level. Levelator is a good tool for quick and dirty balancing of levels of an audio track, but can sound strange when the original recording is not perfectly clean. Note how the three recordings are progressively worse, since Levelator has to deal with more noise.

Scott.aif
The baseline audio clip, recorded in a room with hard walls, note the reverberation that results, this is impossible to remove.

Scott-Levelator.aif
The Scott.aif clip processed through Levelator

Scott-3Comp-2Gain.aif
The Scott.aif clip processed with 3:1 compression and +2dB gain, zero attack, gentle decay

Scott-3Comp.aif
The Scott.aif clip processed with 3:1 compression, zero attack, gentle decay

Scott-6Gain.aif
The Scott.aif clip without compression but +6dB gain

MS audio clips

The following files are available for download as a zip archive: MSdemo.zip (11MB)

MS-1M-2S.aif
The baseline clip recorded with an MS microphone, M in Ch. 1 and S in Ch. 2. See notes in presentation for more details.

MS-M-only.aif
The mid capsule (short-shotgun) only. This is also good demo of how a source to the side and in front of a short shotgun sounds, notice how the off-axis sound is not only muted, but it’s colored. See notes in presentation for more details.

MS-S-only.aif
The side (figure-of-eight a.k.a. bidirectional) capsule only. Also a good demo of just how much side-rejection a bidirectional mic is capable of. See notes in presentation for more details.

MS-M+S-mixed.aif
The M and S channels mixed.

MS-Stereo-M+6dB.aif
The M and S tracks put through an MS matrix to covert Mid/Side to Left/Right, M channel given +6dB gain to emphasize the speaker in front of the mic.

MS-Mono-fr-StM+6dB.aif
The stereo MS-Stereo-M+6dB.aif track collapsed to mono. The +6dB gain added to the M channel messes up the stereo imaging a bit.