Manual

TRINITY GEARBOXING MODE

In Gearboxing Mode, Trinity always generates an output clock at the sample rate set by the

SAMPLE RATE knob for each channel, regardless of the incoming reference frequency. This

output clock is still phase-locked to the reference input, but the sample rates need not match.

For example, you may set the SAMPLE RATE for AUDIO channel A at 48 kHz and apply a

44.1 kHz reference. The device then “gearboxes” 44.1 kHz into 48 kHz output, as selected by

the SAMPLE RATE knob for that channel. This ability to lock to one sample rate and generate

another is very useful for sample rate conversions. Gearboxing Mode dramatically improves

the sound quality of sample rate conversions.

For Gearboxing to work, the incoming reference must be one of 81 recognized valid

frequencies. A valid frequency is i) one of the standard frequencies: 32, 44.1, 48, 88.2, 96,

176.4, 192, 352.8, 384 kHz ii) a standard frequency subjected to every possible combination

of US and Euro pull up/pull downs (8 combinations are possible). See Appendix A for

a complete table of the valid frequencies.

below

Note: Gearboxing can be disabled by using SPLIT mode. For this to work, at least one of the

AUDIO channels must be set to DA, otherwise the input is ignored. SPLIT mode is to be used

only if the input signal is known to be a varispeed frequency, and NOT a standard gearbox

frequency as in the table below.

Appendix A

Table of valid input frequencies in Gearboxing mode

Appendix B

Table of valid input video formats

PAL 24 1080i - 60 1080p - 30 1080psf - 60 720p - 60

PAL 1080i - 59.94 1080p - 29.97 1080psf - 59.94 720p - 59.94

1080i - 50 1080p - 25 1080psf - 50 720p - 50

NTSC 60 1080i - 49.95 1080p - 24.975 1080psf - 49.95 720p - 30

NTSC 59.94 1080i - 48 1080p - 24 1080psf - 48 720p - 25

1080i - 47.952 1080p - 23.976 1080psf - 47.952