The iconic "lala la lalaa" falling-in-love tune you're thinking of is the Romantic Theme Music from the 1985 film , composed by the legendary R.D. Burman.

The Origins of the Song

Wedding Videos: Providing a soft, elegant backdrop for couple montages.

1. Good Dynamic Range: A well-mastered audio version would exhibit a good dynamic range, allowing for a clear distinction between the loudest and quietest parts of the song.
2. Clear Instrumental Separation: High-quality audio would enable listeners to appreciate the individual instruments, such as the sitar, tabla, or harmonium, and their contributions to the overall sound.