TCL (T3:4-6) Audio Compression Formats

Like video, the audio will be compressed into one of several audio formats which help decrease the file size of the final video. As much as possible, it is good to use the default format of the audio being played back from your sequence timeline. The following is a summary of the formats, sampling and bitrate settings most commonly used in videos.

Compression formats: The three most common standards for audio are:

Uncompressed: has no compression, but increases file size (lossless)

AAC: considered a compression format which reduces file size with only the least possible loss (lossy) of signal quality

MPEG: a compressed audio format that loses much more quality than the AAC format because of dropped signal (lossy)

Sample Rate options:

48 kHz: the common sample rate for audio recorded on film and video production equipment

44.1 kHz: the usual sample rate for CD’s, audio workstations, computers, and video game systems

Bitrate Settings:

32-bit: currently the highest bitrate used in digital audio; produces the most accurate copy of the audio signal

24-bit: a lower bitrate setting which still has a high signal quality but produces less data for storage and playback

16-bit: the low end of bitrate quality for digital audio which produces the least amount of data used for playback

ADDITIONAL RESOURCES:

Audio sample rates explained: https://www.izotope.com/en/learn/digital-audio-basics-sample-rate-and-bit-depth.html