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Fiio K19 - Page 5

Fiio K19
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1.2 Compression adjustment
The main function of this part is to limit the maximum output amplitude as a whole and perform
overall attenuation based on the current maximum signal to avoid sound breakage and distortion
caused by excessive amplitude.
Comp THR: function enable trigger threshold.
Comp Attack: When the signal duration meets the start level setting threshold, the function takes
effect.
Comp Release: The signal does not meet the start level setting threshold, and when the duration
reaches this set value, the function fails.
Comp Ratio: After triggering the compression limiting function, the compression amplitude is set.
The larger the value, the greater the reduction.
1.3 Limiter adjustment
The main function of this part is to limit the maximum output amplitude as a whole to avoid sound
breakage and distortion caused by excessive amplitude.
Limiter THR: function enable trigger threshold.
Limiter Attack: When the signal duration meets the start level setting threshold, the function takes
effect.
Limiter Release: The signal does not meet the start level setting threshold, and when the duration
reaches this set value, the function fails.
1.4 The difference between compression adjustment and limiting adjustment
From a functional point of view, compression adjustment and limiting adjustment are both used to
limit the maximum output amplitude of the signal, but they are slightly different: compression
adjustment is an overall limitation. For example, in the range of 20Hz~20kHz, it is detected that the
current 1kHz has been triggered. By setting the compression threshold, the output signal will reduce
the overall amplitude of all signals in the full frequency range of 20Hz to 20kHz, which is
equivalent to reducing the overall volume of the K19. Under the same conditions, if only 1kHz
reaches the limiting adjustment threshold, the output signal will only limit the output amplitude of
1kHz, and other frequency bands will remain unchanged, maintaining the original output size.