To improve the sound quality, if you don’t mind using the third-party smart recording gadget ViWizard Audio Capture, you can record audio without worrying about sound quality loss. With the built-in dedicated audio editor, you can edit the output audio quality according to your requirements, including audio codec, channels, bitrate, sample rate, etc.
You can choose a lossless audio format, like FLAC or WAV. MP3 is a lossy format. To do this, you can use an audio converter to help you out directly.