Peak limiting/audio compression formula needed

1. What should compression threshold be?
2. What is audio compression ratio?
3. What is the difference between a peak limiting and a dynamic compression setting?
4. Is a limiter the same as a compressor?

What should compression threshold be?

Settings between 1.5:1 and 10:1 are the most common. A lower first number in your ratio will give you gentle compression you might apply to an entire mix, while a higher first number will give you an intense squashing effect.

What is audio compression ratio?

Ratio. Ratio specifies the amount of compression applied to the signal. This setting is expressed in decibels. For example, a ratio of 2:1 indicates that a signal exceeding the threshold by 2 dB will be attenuated down by 1 dB. A signal exceeding the threshold by 8 dB will be attenuated down by 4 dB, etc.

What is the difference between a peak limiting and a dynamic compression setting?

Essentially, a compressor compresses the dynamic (volume) range of the track. A limiter on the other hand limits the amount of a signal passing through. Both use a user dialed in volume output cap (known as the threshold) but instead of taking the volume overage and compressing it, a limiter just completely removes it.

Is a limiter the same as a compressor?

Essentially, a limiter is just a compressor with a very high ratio. As a compressor's ratio increases, so will the amount of compression.