This likely depends on the music genre and voice effects applied to the vocal track. Usually, telling if a singer is male or female isn't any more difficult th

This likely depends on the music genre and voice effects applied to the vocal track. Usually, telling if a singer is male or female isn't any more difficult than it is for speakers. While in singing there's considerable overlap in ranges between male and female voice types, the overtones produced by a male singer differ from those produced by a female singer. A C5 sung by a tenor will sound very different from a C5 sung by a soprano. That said, especially in pop music there's the tendency for male singers to use their falsetto register, which tends to sound 'feminine' or androgynous. Moreover, in pop music you also have an abundant use of voice filters and synthesizers such as the infamous vocoders that make distinguishing voice types more difficult.