The Classical Masters could DEFINITELY hear the music of the
pure trot as well as the disunity of DAP! According to the
Highlights of the Clinic with Dr. Mikael Holmström article, DAP
can be caught on ordinary videotape.
Normal video in European format (PAL) is 25 frames per second.
Normal video format in the US (NTSC) is about 30 frames per
second. If the footfalls are on two adjacent frames, then they
are 40 milliseconds apart in the PAL format or about 33
milliseconds apart in the NTSC format
Sometimes the DAP strides of the Olympic horses span two frames,
which would make the footfalls 66 to 80 milliseconds apart. But
even at 33 milliseconds apart, DAP is still CLEARLY audible.
As a cellist I can hear it clearly but the good news is that you
don’t have to be a trained musician to hear it! Thanks to Mike,
my fantastic, wonderful, stupendous videographer/computer expert
husband, below are links to an audio track of clicks that are
about 33 milliseconds apart (exactly one US video frame),
clicks that are 66 milliseconds apart (exactly two US video frames) and a pure two beat click. I think you will find
that the human ear is a lot sharper than many had realized!
First Sound: Beats 33 milliseconds apart. The timing of these beats
are mechanically perfect. The sound is not of an actual horse.
Although the measurement of the tempo and DAP timing were taken
from an actual Olympic video. This is simply an audio sample to
demonstrate that individual beats that are 33 milliseconds apart
(equivalent to one US video frame) are most definitely
audible. (Click Here for 1 Frame MP3)
Second Sound: Beats 66 milliseconds apart. About half of the
actual Olympic video DAP strides covered two frames, so we
included a link of beats spaced about 66 milliseconds apart
(equivalent to two US video frames). (Click
Here for 2 Frames MP3)
Third Sound: Pure two beat clicks. (Click
Here for 0 Frames MP3)