Paul, it's of course hard to tell the right setting for your style but here are some generic recommendations:
Your device comes with the following main control parameters...
Ratio, Threshold, Attack and Decay
...where you should try
Ratio = 1:6
Attack = 50ms
Decay= 90ms
Threshold = (depending on your input signal... just turn it and listen when the compression rushes in. With this setting you control from which input level on the compressor starts compressing with the values described above).
Furthermore you should find a setting where you can select between "Peak" and "RMS" mode. Try "Peak" Mode for vocals.
Finally you should find a setting where you can select between "Soft"- and "Hard"- "Knee". For live use "HARD-KNEE".
I hope my advice was helpful and you now hear a result
MIKE
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