Instance Method

averagePower(forChannel:)

Returns the average power for a given channel, in decibels, for the sound being recorded.

Declaration

func averagePower(forChannel channelNumber: Int) -> Float

Parameters

channelNumber

The number of the channel that you want the average power value for.

Return Value

The current average power, in decibels, for the sound being recorded. A return value of 0 dB indicates full scale, or maximum power; a return value of -160 dB indicates minimum power (that is, near silence).

If the signal provided to the audio recorder exceeds ±full scale, then the return value may exceed 0 (that is, it may enter the positive range).

Discussion

To obtain a current average power value, you must call the updateMeters() method before calling this method.

See Also

Using Audio Level Metering

var isMeteringEnabled: Bool

A Boolean value that indicates whether audio-level metering is enabled.

func updateMeters()

Refreshes the average and peak power values for all channels of an audio recorder.

func peakPower(forChannel: Int)

Returns the peak power for a given channel, in decibels, for the sound being recorded.

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