A package to dynamically measure microphone input level
npm install react-native-sound-levelA package to dynamically measure sound input level in React Native applications.
Can be used to help user to adjust microphone sensitivity.
Install the npm package and link it to your project:
``
npm i react-native-sound-level --save
On iOS you need to add a usage description to Info.plist:
`
On Android you need to add a permission to AndroidManifest.xml:
`
In XCode, in the project navigator:* Right click _Libraries_
* Add Files to _[your project's name]_
* Go to
* Add the fileIn XCode, in the project navigator, select your project.
* Add the
libRNSoundLevel.a from the _soundlevel_ project to your project's _Build Phases ➜ Link Binary With Libraries_
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1. Add to package.json:
2. You may need to make QT's multimedia library accessible for linker
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To make it run correctly on iOS you may need the following:
1. Add to your ios/Podfile file.
2. Unlink the library if linked before (react-native unlink react-native-sound-level).
3. Run pod install from within your project ios directory
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1. Request permission to access microphone, handle the UI by yourself.
You may use react-native-permissions package or simply
PermissionsAndroid module.
2. Configure the monitor and start it.
3. Makes sense to stop it when not used.
`ts
import RNSoundLevel from 'react-native-sound-level'const MONITOR_INTERVAL = 250 // in ms
const requestPermission = async () => {
// request permission to access microphone
// ...
if (success) {
// start monitoring
RNSoundLevel.start()
// you may also specify a monitor interval (default is 250ms)
RNSoundLevel.start(MONITOR_INTERVAL)
// or add even more options
RNSoundLevel.start({
monitorInterval: MONITOR_INTERVAL,
samplingRate: 16000, // default is 22050
})
}
}
useEffect(() => {
RNSoundLevel.onNewFrame = (data) => {
// see "Returned data" section below
console.log('Sound level info', data)
}
return () => {
// don't forget to stop it
RNSoundLevel.stop()
}
}, [])
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{
"id", // frame number
"value", // sound level in decibels, -160 is a silence level
"rawValue" // raw level value, OS-dependent
}