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MediaTrackConstraints: sampleRate property - Web APIs | MDN
If this value is a number, the user agent will attempt to obtain media whose sample
rate is as close as possible to this number given the capabilities of the hardware and
the other constraints specified. Otherwise, the value of this
ConstrainULongexact is specified or both
min and max are provided and have the same value) or to a
best-possible value.
