Reverb Flashcards
How did reverbs start?
chambers for film
What was the main problem with early reverbs?
the gap between the initial sound and the early reflections was too large, so you needed a delay between them
What is the main problem with reverb emulators?
they are not pitch accurate because of a chorus effect to cover up space between delays
What is the most natural and accurate sense of reverb?
stereo pair in a room
How does spring reverb work?
input transducer vibrates with the input signal, attached coiled spring vibrates, hitting output transducer and creating output signal
How do plate reverbs work?
similar to spring reverb but with a plate
What is direct sound?
dry signal we feed into the reverb emulator
What is pre-delay?
time between direct sound and early reflections
What does pre-delay tell us?
clues about size and distance of room
What does a long pre-delay do?
keeps instruments at front of mix
What do early reflections do?
provide brain with most of info regarding space, contribute to realism of depth
What does the level of early reflections suggest?
size of room; late reflections=large room
What do louder early reflections mean?
more distance between the source and the listener
What is critical distance?
the point at which reverberant sound and direct sound are the same level
What is RT60?
the time it takes reverb in a room to decay by 60dB
What is diffusion?
scattering of sound
What does a properly diffused sound field produce?
more uniform frequency response
Where can frequency treatment happen for reverb?
pre-reverb, damping, and post-reverb
What is pre-reverb frequency treatment used for?
removing unwanted frequencies that can impair reverb output
What is damping?
frequency treatment within reverb algorithm
What is post-reverb frequency treatment used for?
EQing reverb output to fit it into the mix
What does HF damping do?
results in more natural simulation and prevents unwanted noise from lingering on reverb tail
What does LF damping do?
simulates rooms with materials that absorb more LF than HF (like wood)
What are the 3 main problems with mono reverb?
limited realism, direct sound masks reverberant sound, does not mimic directional behavior of natural reverb
