Index 0 is the left channel and 1 is for the right channel. Trigger catch-ups occur when the Trigger method is not called with a frequency high enough to be able to process all the samples and some have to be left out (skipped). During normal operation this should not be happening. You should either increase the frequency of the timer calling the Trigger method or reduce the processing load within that timer call. If TriggerCatchUps is zero, this is also a guarantee that no sample has been skiped.

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