Hey after I convert the file from m4a to mp3, the file is only noise. Can't hear anyth

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mp3 file full with noise about lame HOT 2 CLOSED

pro100andrey commented on July 28, 2024

mp3 file full with noise

from lame.

Comments (2)

pro100andrey commented on July 28, 2024

Hi @Abir-crypto, AudioConverter.swift this pcm to mp3 coveter.

You are not decoding the M4A audio into raw audio data before sending it into LAME.

"PCM audio" means no compression.

Thanks!

from lame.

pro100andrey commented on July 28, 2024

@Abir-crypto Example how to record wav file

 let fileURL: URL = {
            let src = "sound.wav"
            return FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent(src)
       }()


       let recordSettings: [String : Any] = [AVFormatIDKey: Int(kAudioFormatLinearPCM),
                                      AVSampleRateKey: 44100.0,
                                      AVNumberOfChannelsKey: 1,
                                      AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue ]
        
        do {
            audioRecorder = try AVAudioRecorder(url: fileURL, settings: recordSettings)
            audioRecorder?.prepareToRecord()
        } catch {
            print("Error creating audio Recorder. \(error)")
        }