TCM™ -- Transient Capture Mode
Transient Capture Mode™, or TCM™ works on the principle of delaying the audio signal up to 30µs, and letting an
unheard “control” signal begin to activate the response of the VCA. The overall result is the perception of a very fast
moving compressor, able to catch the front of almost any transient signal, but not delaying the audio signal enough to
produce any phase correlation errors. In the DDP, you may vary the delay, in the form of a TCM delay control, with a
range from 0µs (microseconds (µs) are measurement units in 1000ths of a second) to 3ms. While this is not enough
delay to cause phasing errors, it is enough to give the device time to start to react before the signal arrives at the
point of processing.
The controls for the TCM section are in the Gate parameter area. While the effect is global, the gate must be turned
on in order for the TCM module to work. If you want to use the TCM functions without the gate, simply turn the gate
on and set the ratio to 1:1 and the threshold to -75dB. This effectively turns the gate on, but leaves it wide open, no
matter what signal is presented at the threshold.
The resulting implementation in the DDP allows you to vary the amount of delay, based on the transient characteris-
tics of the signal being processed. The signal sounds smoother and easier for the DDP to process in the compressor,
limiter, and de-esser functions.
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Section 6: Appendices
