All the waveforms that you enter into your ``events'' file will have an instantaneous on. This can be annoying. As a way of dealing with the annoyance, you can specify a ``ramp'' which will ramp up every waveform the same amount.
wigout -r 100 datafile
This will cause every sound to ramp up with a duration of 100 samples, which is very short.
The most useful lengths for ramps are between 100 and 500 samples.