during the recording of the vocals, mushfiq's voice unfortunately suffered a severe setback and he had to withdraw after only recording his voice for seven of the songs. arshad took upon himself and stepped in to sing "shantir shopno" and "nirbashon". in addition, arshad invited sunjoy from warfaze as a guest artist to sing on the tracks "mukti dao" and "kaalo raat". during the album mastering process, one of the guitar tracks of kaalo raat was accidentally deleted and mainul had already left the country. other guitarists from the bands in dhaka, warfaze and aces that could be of help were also unavailable. arshad later enlisted the help of minhaz ahmed piklu (formerly of jolly rogers and aurthohin) and he was gracious enough to play as a guest artist and re-record the deleted guitar track of "kaalo raat". in addition, at that time mashuk rahman of in dhaka was visiting dhaka, bangladesh from minnesota, usa on a personal trip. arshad amin invited him to play a lead in the track kaalo raat. mashuk kindly obliged and provided the final lead guitar piece, which was composed in a matter of minutes, while they were in the studio, at the end of kaalo raat.