Reverberator parameters:
reverb time  initial delay early reflection level  diffusion  eq 
simulates the amount of reflectivity of an acoustic space  the delay between the direct sound and early reflections preceding the reverberation  a cue to the amount of reflectivity of the room surfaces  controls the density of reverberations  simulates the absorptive/
reflective characteristics of the room surfaces
low pass
high pass
band pass 
Reverberator types:
natural  spring 
echo chamber or room acoustics
expensive dedication of space
inflexible one room - one reverb 
natural sound
unique reverberation characteristics 
transducer converts electrical signal to mechanical vibration in a metal spring which propogates back and forth along the length of the spring between its anchor points

 multiple springs or complex spring thickness result in more complex reflection patterns

 reverb time is adjusted by damping the spring's motion or adjusting its tension


 lacking in high frequency response

 prone to overdriving with peak levels and transients which result in an unpleasant and unnatural glitch, compression of the input can lessen this problem

 prone to mechanical disturbance by nearby loudspeakers or floor movements, (dancers, actors, etc.) 

plate  digital algorithms 
use a metal plate suspended, under tension, in a frame 
better transient and high frequency response than spring 
typically large and heavy
reverb type (simulations)
       physical space
       liveness (reflectivity)
       size (time between reflections)
frequency processing eq
initial delay
early reflections
reverb time
high frequency damping
Automation (MIDI control) 

If good anti-aliasing filters, high resolution (more bits per sample) and high sampling rate are used, the sound quality of digital reverberation can be very good with wide dynamic range, low noise and distortion  Optimum quality can be achieved with any reverberation device by taking care that the input signal level is as high as possible without risking overdrive distortion. This will allow the output of the effect to be used at a lower level and reduce the audibility of any inherent low-level noise.