At times, Himesh uses contrasting pitch range variation in male and female playback singing, which increases the overall melody impact of those lines i.e. the same lines that are sung by male playback in high pitch are sung in low pitch by female playback.
Examples:
Dil Tumhare Bina from 36 China Town
Himesh sings the lines AB TANHA RAHA NA JAAYE from 1.15 to 1.24 in high pitch whereas Alka Yagnik sings the same lines AB TANHA RAHA NA JAAYE from 1.41 to 1.47 in lower pitch with subtle vocals.
Afreen from Kajraare
Himesh sings the core mukhda hook line AFREEN * 4 in lower pitch range with his lower bazz octave vocals, whereas Harshdeep Kaur sings the same hook line AFREEN * 4 rite at da end from 6.10 to 6.23 in high pitch range with super high pitched penetrating vocals.
Due to this stark contrast, Harshdeep's lines strike a chord big time and impact of her lines is manifold.
There is a great pitch variation in between male and female singers i.e. Himesh sings the mukhda lines...JAB SE TOSE AAKHIYAAN LADAAYI HAI in fulltu high pitch, whereas Harshdeep Kaur sings those same lines in lower range towards the end of the song...and Himesh sings the core mukhda repetitive hook AFREEN * 4 in lower bazz octave, whereas Harshdeep Kaur sings those same lines in fulltu high pitch towards the end of the song.
This pitch range variation gives the required punch to the song.
Tanha Tere Bagair from Ahista Ahista
KK sings his mukhda and stanza lines in high pitch whereas Sunithi Chauhan sings her mukhda and stanza lines in lower pitch range with deep husky vocals.
Due to this stark contrast, Sunithi's vocals strike a greater chord.