Previous        Up        Next

Expander






The Expander increases the dynamic range of the audio signal by making the quite parts of the sound quieter.  It works by reducing the level of the sound that's below the threshold by the ratio amount.  It can also operate as an upward compressor by increasing the level of the sound that's below the threshold.


RMS/Peak - RMS (root mean square) or peak level detection.  Peak detection is for noise gating.


Upward Compressor - Raises the output level below the threshold instead of lowering it.


Threshold - Gain reduction starts below this level.


Ratio - The amount of gain reduction.  Below 2:1 is mild expansion.  Above 10:1 is noise gating.


Soft Knee - How gradual the expander starts working below the threshold.


Attack - The time it takes for the expander to stop working.


Smooth - Smooths the attack and release transitions.  0, 1, 2 and 3.


Release - The time it takes for the expander to start working.


Output Gain - The amount of gain applied to the output signal.  The LED shows when it's over 0 dB.


Clip - The type of clipping used on the output signal.  Soft (+2, +4, +6 dB) and hard at 0 dB.


Meter - Shows the amount of gain reduction.


 

Notes:

If the expander doesn't seem to be working, try raising the Threshold.

If it's expanding too much, try lowering the Threshold or lowering the Ratio.

If it doesn't sound natural when the expander is attacking, try decreasing the Attack time.

If it's "pumping" or "breathing", try increasing the Release time.





When the Expander is operating as an upward compressor, some of the parameters work differently.


Threshold - Gain amplification starts below this level.


Ratio - The amount of gain amplification.


Attack - The time it takes for the compressor to start working.


Release - The time it takes for the compressor to stop working.


Meter - Shows the amount of gain amplification.


 

Notes:

If the compressor doesn't seem to be working, try raising the Threshold.

If it's compressing too much, try lowering the Threshold or lowering the Ratio.

If it doesn't sound natural when the compressor is attacking, try increasing the Attack time.

If it's "pumping" or "breathing", try increasing the Release time.