How to improve the output sound quality?

Please set the output format as MP3 with the 256 kbps bitrate or select M4A as output format with the 256 Kbps bitrate.

After setting the music parameter, please slow down the converting speed. After the conversion, the quality will not be compromised, unless you lower the bitrate to 128 kbps or 192 kbps. Since the Apple Music bit rate is 256 kbps, you'd better select the output bitrate as 256kbps.