Go to Effect and Amplify to fix the muffling of your audio. Click "Preview" to check whether the noise has been removed. If yes, click "OK" and then export the denoised audio to MP3, WAV, or other formats from Audacity.
Go to Effect and Amplify to fix the muffling of your audio. Click "Preview" to check whether the noise has been removed. If yes, click "OK" and then export the denoised audio to MP3, WAV, or other formats from Audacity.