The classical tune of the film was inspired from George Benson's We As Love. There was also a cover version of We As Love done by Ronnie Foster from the album Delight.
" Om Shanti Om " was sampled from Lord Shorty song " Shanti Om".
Laxmikanth Pyarelal won the Flimfare best music director award for the film.
Russian DJ RZHB sampled "Main Solah Baras Ki". It was titled "Bycycle Amphibian".A music video was also posted on youtube. The only problem is people are unable to search the video due to the DJ writing his name and all songs in Russian writing .To find the songs, one must go to the Google Translate page and type in the English writing of the songs name, then click "Translate" into Russian. Only then when the Russian writing shows up can the person cut and paste the Russian writing and enter it under the search engine on youtube.com. Then you will be able to find all of RZHB's work.
Karz had a great music not only because of Subhash Ghai's well known taste in music but also because somebody taunt him that his films do not have good music hoti that time. Hence although the story was a thriller, it was written by Ghai as a musical. The hero is a guitarist and there is a haunting tune that acts as a connection to his previous birth and takes him to his murderer.