iPhone 上是单声道吗

swift
import AVFoundation
// 创建音频文件路径
let audioPath = Bundle.main.path(forResource: "stereo_audio", ofType: "mp3")
// 创建音频播放器
var audioPlayer: AVAudioPlayer?
do {
    // 初始化音频播放器
    audioPlayer = try AVAudioPlayer(contentsOf: URL(fileURLWithPath: audioPath!))
    
    // 开启立体声播放
    audioPlayer?.pan = 0.5
    
    // 播放音频
    audioPlayer?.play()
} catch {
    print("音频播放失败")
}