Switching
Normally when the subject switches to another sample, the currently
playing sample stops and the another starts from beginning. In
parallel switching the switching to another sample is
done by cross-fading to the other sample and does not just jump to the
start to the beginning of the sample. Useful in test where long
samples are compared. Parallel switching can be used only with
free sequence tests.
Normal switching
In normal switching when the subjects switches to
another sample, the currently playing sample is stopped and the
another starts from beginning.
Normal switching is selected by setting the
sampleSwitching parameter in the test config file to
'normal':
# set switching to 'normal'
sampleSwitching=normal
Parallel switching
In parallel switching the switching to another sample
is done by cross-fading to the other sample. Both samples are played
at the same time and the sample position is the same in both samples.
Parallel switching is selected by setting the
sampleSwitching parameter in the test config file to
'parallel':
# set switching to 'parallel'
sampleSwitching=parallel
Sample switch cross-fade type
The type of the cross-fade used in parallel swithing
can be selected. Available types are linear fade and
exponential (decibel linear) fade.
Cross-fade type is selected by setting the
sampleSwitching.fadeType parameter in the test config
file. Use value 'linear' or 'exp' to select linear
or exponential fade. The default is 'linear'. Example:
# set sample switching cross-fade type
sampleSwitching.fadeType=linear
Sample switch cross-fade length
The length of the cross-fade in
parallel swithing
is selected with the sampleSwitching.fadeLength
parameter in the test config file. The length of fade is in seconds.
The default is 0.04 seconds (40ms). Example:
# set sample switching cross-fade length in seconds
sampleSwitching.fadeLength=0.04
The fade length was set to 40ms (0.04s).
Notes
Some notes about switching:
- Parallel switching is useful in tests where long samples are
compared.
- Parallel switching is only usable for
free sequence tests. If fixed
sequence is used, parallel switching is not used (even if set to
parallel) and normal switching is used.
·
Tests index
·
Document index
·
Last modified: Mon Jul 20 13:43:27 EEST 1998