Set volume of multiple audio track and play into AVPlayer without exporting new url

Question

• Recently I want to set volume of multiple audio track and add into AVMutableComposition using composition.addMutableTrack(withMediaType: .audio, preferredTrackID: CMPersistentTrackID())

• This process is in for loop and after I play AVMutableComposition into AVPlayer. but i am not able to set volume of each track we only set volume of AVMutableComposition after adding all track.

• So pls advice how can i set volume of multiple audio track and play into AVPlayer.

I am trying this below code but i am not able to set volume of each track.

Here, asset is multiple so, i am add into trackMixArray

var trackMixArray = [AVMutableAudioMixInputParameters]()
let asset = AVAsset(url: audioUrl)

let assetTrack = asset.tracks(withMediaType: AVMediaType.audio)[0]
                  
let trackMix = AVMutableAudioMixInputParameters(track: assetTrack)
                  
trackMix.setVolume(0.0, at: CMTime.zero)
trackMixArray.append(trackMix)

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var queue: AVPlayer = AVPlayer()

let audioMix = AVMutableAudioMix()
audioMix.inputParameters = trackMixArray
                        
let playerItem = AVPlayerItem(asset: composition)

playerItem.audioMix = audioMix
                        
self.queue.replaceCurrentItem(with: playerItem)