1. Dart
2. dart:web_audio
3. BiquadFilterNode
4. frequency property

##### BiquadFilterNode class

1. Constructors
2. BiquadFilterNode
3. Properties
4. channelCount
5. channelCountMode
6. channelInterpretation
7. context
8. detune
9. frequency
10. gain
11. hashCode
12. numberOfInputs
13. numberOfOutputs
14. on
15. Q
16. runtimeType
17. type
18. Methods
19. addEventListener
20. connectNode
21. connectParam
22. disconnect
23. dispatchEvent
24. getFrequencyResponse
25. noSuchMethod
26. removeEventListener
27. toString
28. Operators
29. operator ==

description

# frequency property Null safety

AudioParam? frequency

## Implementation

    AudioParam? get frequency native;