Sonnox Oxford Transient Modulator - Manual (Page 5)

2.1 Ratio 2 OPERATION
2.1 Ratio
The ratio value represents the linear
dB ratio by which the output gain will be modified
by instantaneous changes in the input level.
Positive values will increase the gain of the signal
during transients. So, for example, when the ratio
control is set at +1, a drum ‘thwack’ that has a peak
of 10dB above the average level will produce a level
increase of twice that (20dB) at the output, because
the gain during the transient will be increased
by the same amount as its level difference.
For negative ratios the reverse is true, and for a negative ratio of -1 the drum attack
transient would be reduced to the corresponding average level of the signal, and will
therefore be removed. With the ratio control in its central position (0), the TransMod
process does not affect the signal at all.
2.2 Overshoot
The overshoot time sets the period over which the dynamic changes occur, depending on
the input programme dynamics. A short overshoot period will enhance (or reduce)
transients for a very short time and cause only the leading edges of the transients to be
modified. For example, a small overshoot time can accentuate short-term events in the
programme for small percussion instruments such as bells, whilst largely ignoring large
and softer transients from instruments such a drums etc.
Increasing the overshoot period allows transient enhancement to occur over longer
periods, therefore providing a method to tune the action to suit the programme material
and produce the required effect.
The adaptive nature of the processing, over both level and time, allows optimal settings of
the timing value to be achieved for complete tracks and even complex final mixes.
Because the TransMod process is so rapid, low settings may not be heard because the
duration of the transients being affected are too short. Generally the most audible effects
occur from the mid position of the overshoot control upwards.
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