adv audio recording tz Flashcards
Reason to use Compression ?
Compression: allows the user to control the dynamic range of a signal bringing high peaks closer to the lower signal.
Source audio will reduce the compressor.
how does compression work?
when a signal gets too loud above a certain threshold, -> source audio will be reduced based on preset parameters
common in Pop:, subtle - drastic
Threshold
defines the point where the compression starts working
ratio
the ratio is:
The compression ratio determines
HOW MUCH gain reduction the compressor applies when the signal PASSES a THRESHOLD level
or
how many decibels input is OVER Threshold/amount of compression (decibels are decreased to output
i.e. apply 2:1 if input is 8db over threshold-> reduced FINAL output to 4 db
now apply 4:1 ratio-> 8db input over threshold->6 db output
attack
how fast a compressor starts to work when threshold is exceeded
note: short transients like snare drum, fast
vocals may sound too unnatural if attack set too fast
make up gain
entire passage can be increased in volume AFTER peaks have been compressed now that all peaks fit under the threshold
Release
The TIME it takes for the compressor to go from Gain-reduction BACK to ORIGINAL input level
Limiters
High ratio with setting MORE than 10:1 type of compression
-catches the loudest peaks of an audio source and applies brick wall compression that PREVENTS it from exceeding the CLIPPING point of 0 dBFS
Allows increases in overall volume by PREVENTING clipping peaks
3 Main post production Audio categories
- Music (gives emotion to a scene or build up
anticipation) - Sound effects (fills in the spaces of action)
- Dialogue (DX
foley:
Film Score
Music written specifically for the film
Sound Track
audio portion of any film
includes, dialogue, music, sound effects, any sound that belongs to the film
Tie Lines
unassigned connection that leads from one studio location to another
commonly used to connect floating gear
or route alt signals from one place to another.
Not extensions
LTC
linear time code by SMPTE
synchronizes audio, video, synths, drum machines and sequencers
mixing film audio to broadcast standard of:
A85 standards, a.k.a BS 1770-3
mix to these standards to prevent blowing up speakers
CALM ACT compliant
Re amp
A way to alter the sound of a recorded track or to inject a new sense of acoustic space into an existing take
When you Take a multitrack out such as a guitar or vocal track as a line in to an instrument out into an amp capturing microphone and send it back to a DAW to insert into another track
