Sync-One2 User Guide
Page 7
Play Test File
Take Measurements
Analyse Results
System OK
Adjust the Audio
within the system
under test
Delay
Acceptable?
No
Yes
This uses both modes of Sync-One2, Measurement Mode and Menu Mode. Measurement Mode takes
the readings and stores the 60 most recent in a memory buffer. Always take a number of readings to
determine the error, to smooth out the variances in signal processing.
Once a number of readings have been taken, enter Menu Mode and choose the first Menu Item {Show
Stats}. This displays the average and span of the readings and gives the best indication of the situation
in any given system.
The span is the difference between the two most extreme readings in the buffer. A low span means the
system is stable in its operation, a span of 10ms or lower is ideal.
The average, calculated from all the readings in the buffer, gives an indication as to the delay of the
system. Naturally an average of 0ms / 0.00 frames would be perfect but in the real world anything
under 10ms will be hard for anyone to detect.
For example, if after a series of measurements, the Show Stats menu gives the following screen. The
low span indicates the system is stable but suffers from a video delay of about 32ms. If this were a
home cinema, adding an audio delay of 32ms and re-testing should result in a synchronised solution.
Should the span reading be high, say over 25ms this may suggest there could be inaccurate/anomalous
results within the memory buffer. Details of how to go through the memory buffer and remove any
suspect readings is given in Show Stats menu item section of the guide on page 11.
If any adjustments have been made to the system under test, then always run the test again to confirm
the adjustments have brought things back into synchronisation. (NB, remember to clear the memory
buffer via the ‘Clear All Stats’ menu item or the results could be confusing).
Depending on the various possible input paths, e.g. Blu-Ray players, network streamers, games
consoles etc. it might be required to configure a delay for each of the input devices if the audio
processor supports multiple values. If it is not possible to configure the individual input channels, pick
the most commonly used input, which is able to play suitable test file.
A +032 M01
S 0002 ms +033
