How to set AVAudioUnitEQ equalizer presets gain values for 10 frequency bands in iOS Swift











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I could add an audio setup to change equalizer by changing slider values by 



let FREQUENCY: [Float] = [31, 62, 125, 250, 500, 1000, 2000, 4000, 8000, 16000]

//let FREQUENCY: [Float] = [60, 230, 910, 3600, 14000]



self.audioEngine = AVAudioEngine.init()

self.audioPlayerNode = AVAudioPlayerNode.init()

self.audioUnitEQ = AVAudioUnitEQ(numberOfBands: 10)

self.audioEngine.attach(self.audioPlayerNode)

self.audioEngine.attach(self.audioUnitEQ)        



for i in 0...9 {

    self.audioUnitEQ.bands[i].filterType = .parametric

    self.audioUnitEQ.bands[i].frequency = FREQUENCY[i]

    self.audioUnitEQ.bands[i].bandwidth = 0.5 // half an octave

    let eq = self.value(forKey: String(format: "eq%d", i)) as! UISlider

    self.audioUnitEQ.bands[i].gain = eq.value

    self.audioUnitEQ.bands[i].bypass = false

}


But Is there any method to change gain values or set equalizer presets like Accoustics, Rock etc. How to set their gain values for those presets






ios swift avplayer equalizer preset







share|improve this question




























    up vote
    1
    down vote

    favorite












    I could add an audio setup to change equalizer by changing slider values by 



    let FREQUENCY: [Float] = [31, 62, 125, 250, 500, 1000, 2000, 4000, 8000, 16000]
    
//let FREQUENCY: [Float] = [60, 230, 910, 3600, 14000]
    

    
self.audioEngine = AVAudioEngine.init()
    
self.audioPlayerNode = AVAudioPlayerNode.init()
    
self.audioUnitEQ = AVAudioUnitEQ(numberOfBands: 10)
    
self.audioEngine.attach(self.audioPlayerNode)
    
self.audioEngine.attach(self.audioUnitEQ)        
    

    
for i in 0...9 {
    
    self.audioUnitEQ.bands[i].filterType = .parametric
    
    self.audioUnitEQ.bands[i].frequency = FREQUENCY[i]
    
    self.audioUnitEQ.bands[i].bandwidth = 0.5 // half an octave
    
    let eq = self.value(forKey: String(format: "eq%d", i)) as! UISlider
    
    self.audioUnitEQ.bands[i].gain = eq.value
    
    self.audioUnitEQ.bands[i].bypass = false
    
}


    But Is there any method to change gain values or set equalizer presets like Accoustics, Rock etc. How to set their gain values for those presets






    ios swift avplayer equalizer preset







    share|improve this question


























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I could add an audio setup to change equalizer by changing slider values by 



      let FREQUENCY: [Float] = [31, 62, 125, 250, 500, 1000, 2000, 4000, 8000, 16000]
      
//let FREQUENCY: [Float] = [60, 230, 910, 3600, 14000]
      

      
self.audioEngine = AVAudioEngine.init()
      
self.audioPlayerNode = AVAudioPlayerNode.init()
      
self.audioUnitEQ = AVAudioUnitEQ(numberOfBands: 10)
      
self.audioEngine.attach(self.audioPlayerNode)
      
self.audioEngine.attach(self.audioUnitEQ)        
      

      
for i in 0...9 {
      
    self.audioUnitEQ.bands[i].filterType = .parametric
      
    self.audioUnitEQ.bands[i].frequency = FREQUENCY[i]
      
    self.audioUnitEQ.bands[i].bandwidth = 0.5 // half an octave
      
    let eq = self.value(forKey: String(format: "eq%d", i)) as! UISlider
      
    self.audioUnitEQ.bands[i].gain = eq.value
      
    self.audioUnitEQ.bands[i].bypass = false
      
}


      But Is there any method to change gain values or set equalizer presets like Accoustics, Rock etc. How to set their gain values for those presets






      ios swift avplayer equalizer preset







      share|improve this question















      I could add an audio setup to change equalizer by changing slider values by 



      let FREQUENCY: [Float] = [31, 62, 125, 250, 500, 1000, 2000, 4000, 8000, 16000]
      
//let FREQUENCY: [Float] = [60, 230, 910, 3600, 14000]
      

      
self.audioEngine = AVAudioEngine.init()
      
self.audioPlayerNode = AVAudioPlayerNode.init()
      
self.audioUnitEQ = AVAudioUnitEQ(numberOfBands: 10)
      
self.audioEngine.attach(self.audioPlayerNode)
      
self.audioEngine.attach(self.audioUnitEQ)        
      

      
for i in 0...9 {
      
    self.audioUnitEQ.bands[i].filterType = .parametric
      
    self.audioUnitEQ.bands[i].frequency = FREQUENCY[i]
      
    self.audioUnitEQ.bands[i].bandwidth = 0.5 // half an octave
      
    let eq = self.value(forKey: String(format: "eq%d", i)) as! UISlider
      
    self.audioUnitEQ.bands[i].gain = eq.value
      
    self.audioUnitEQ.bands[i].bypass = false
      
}


      But Is there any method to change gain values or set equalizer presets like Accoustics, Rock etc. How to set their gain values for those presets






      ios swift avplayer equalizer preset




      ios swift avplayer equalizer preset






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 4 hours ago

























      asked 6 hours ago









      Dinesh Kumar

      658




      658





























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