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Appendix C: I/O Delays
MTRX Studio Input to Output Delays
The total system delay has to be large enough to accommodate for the processing latency in the unit. There is almost the same delay on
all the digital I/O, and any difference is due to an inherit difference of time it takes to sync to the different signals before samples are
available for time stamping. Digital inputs are time stamped when they enter the matrix algorithm and buffered according to the time
stamp on all outputs in the digital domain. This maintains phase coherence regardless of audio signal path and processing. Likewise, sig-
nals maintain the same phase whether they are running through the summing process, EQ processing, or not.
MTRX Studio has a general system delay of 7 samples on the digital matrix and SPQ (regardless of whether or not SPQ is enabled) path
ways. The digital interfaces add one more sample of delay for a total of 8 samples of latency (166 microseconds at 48 kHz) for digital
I/O.
There is an additional delay with analog I/O—AD (analog-to-digital) and DA (digital-to-analog)—due to the conversion process. There
is approximately 650 microseconds of delay with the analog-to-digital conversion, and approximately 250 microseconds of delay with
the digital-to-analog conversion. These delays are not dependent on the sample rate. Once digitized, the signal is time stamped and buff-
ered the same as with digital inputs.
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