Sync-One2 User Guide
Page 9
The user offset is input in milliseconds (via the ‘User MS Offset’ Menu Item) however if a frame rate is
also set the delay calculated in frames will be displayed too. Readings are tagged with a symbol to
indicate he setting is active.
Use in larger spaces
Another example for Professional use is within large spaces, such as Lecture Theatres or Cinemas.
Given sound travels much slower than light, in larger spaces setting the synchronisation delay at the
screen could mean it is out for those in some areas of the space. The optimal would be to take readings
when sitting in a central listening position. Depending on the ambient environment doing this may not
result in accurate readings. Combine the problem of taking accurate readings with the problem that a
central position is also unlikely to have a speaker close by, things get tricky to determine the optimal
adjustments needed.
To get around this problem, a speaker distance can be input which would result in the readings taken
being adjusted for the time it would take the sound to travel the distance input (well, for sound
travelling at 21
o
c at sea level).
For example, in a lecture theatre the central seating position is 5m from the nearest speaker and it’s
much easier to take measurements at the front of house close to one of the main speakers. When
measurements are taken an adjustment would be required to cater for the time it takes the sound to
travel the 5m to the central seating position (an adjustment of 15 milliseconds in this example).
However, by setting a speaker distance of 5m the measurements taken and statistics calculated are
automatically adjusted to take account of the time for sound to travel the 5m to the seating position.
When a distance is input (via the ‘Speaker Dist’ Menu Item), all readings are tagged with a to indicate
the setting is active.
Other Adjustments
The default setting is to have the Audio and Visual sensors running at their maximum sensitivity, which
should be fine in most environments as the unit self calibrates to account for ambient conditions.
However, should false readings continue to be taken, then a lower trigger levels is probably required.
Five levels are available, independently set for the audio and visual sensor, follow the instructions on
these items as shown on page 13.
