The factory audio test parameters in <ftyAudioTest>.
optional
ratedPower: number
Rated power.
optional
difPower: number
Power difference.
optional
difHz: number
Frequency (Hz) difference.
optional
difZero: number
Zero-crossing difference.
optional
difCrest: number
Crest difference.
optional
difSame: number
Sameness difference.
optional
difFreq: number
Frequency difference.
optional
flitFreq: number
Filter frequency; the firmware spells the element flitFreq.