This website contains a collection of songs from the songbook "The Christian Harmony", 2010 edition. You can listen to them, but do not expect realistic sound. Do not even expect real singers; you will hear robots singing. They sound sterile and artificial. They don't know what "accent" is and sing too high in general. But they hit the right notes most of the time... and they allow you to listen to individual parts (Treble, Alto, Tenor, Bass) and learn them.