Boss RCL-10 Owner's Manual page 3

FUNCTIONS
The RCL-10 has four functions; Compressor, Limiter,
Expander and Noise Gate.
«Compressor/Limiter
Both are the functions of compressing the input
signal, but different in the threshold level (*1) and
ratio (*2) settings. Compressor is used to compress
the signal of a wide dynamic range and even the
level. Limiter is a stronger function that is used to
protect a unit from excessive input or to reduce
sound distrotion.
«Expander
This is the function of widening the dynamic range
of input signal. Use this to make a dynamic sound.
Threshold Level (*1)
This is the level at which the compressor or limiter
Starts the compressing procedure. The signal
lower than the threshold level will pass through
without being compressed.
Ratio (*2)
This is the compression ratio to the input level. For
instance, when a 10 dB signal is fed in and 5dB
level signal is sent out, the ratio will be 10dB : 5dB
=2:1.
'Threshold Level and Ratio:
(wugp) 120a7 INdiInNO
Ratio =a: b
Input Level (aBm)