What's New?

Add the ability to include a fade-in and fade-out (edges) to the generated tone or sweep

Parameter: ?edge=<value>, with the value is the ramp duration in ms. The default is edge=0, no fade-in or fade-out.
The ramp is linear, and will always go from 0 dB to the specified amplitude value.
edge can either be positive or negative.
A positive edge value will add the edge duration to the tone (addition), which will result in a tone with the total duration of duration + (2 * edge) (in and out).
A negative edge value will maintain the specified duration (inclusive). The maximum negative edge value is limited to duration / 2, in which case, the amplitude will rise to the specified amplitude, and then immediately fall back down.

The edge value, if specified, in /sweep or /save_sweep must be negative (inclusive), as the duration of the sweep is also limited by the frequency start and end range.