CMTimebaseSetRate(_:rate:) Sets the rate of a timebase. Declarationfunc CMTimebaseSetRate(_ timebase: CMTimebase, rate: Float64) -> OSStatus See AlsoGetting and Setting the Time RateCMTimebaseGetRate(_:)CMTimebaseGetEffectiveRate(_:)CMTimebaseSetRateAndAnchorTime(_:rate:anchorTime:immediateSourceTime:)