It is a raga of the Carnatic system, but has become very popular in North India. This raga has been composed largely by using Rishabh in Raga Kalavati.
Originally called Siva Kalyan, the raga went out of circulation, having heard Karnataka Janasammohini, Pt. Ravi Shankar ji brought it back with the Karnataka name. Pangs of separation, nostalgia, implicit faith in God are the moods of Janasammohini. It can be sung from 6.30 to 9.30pm.
This raga has been included in Khamaj Thaat. Apart from Komal Nishad, the remaining vowels are used pure. Since there is a middle class in both ascending and descending, its caste is Shadav Shadava. Singing time is the second part of the night. Gandhar voice has got the place of conversational voice of Vaadi and Dhaivat voice. Aaroh-sa regg, p, dhannidhi san. Descending - sannidhpa, g, re, sa. The catch - g paddhi nidhi p, g pagare, nidhisa.
Janasammohini can be derived, rather ambiguously, by introducing R to Kalavati.
All notes in Janasammohini are Shuddha except Ni. The avaroh has a sixth note Re, which differentiates the raga from another soothing raga Kalavati. Kalavati has the same swaras as Janasammohini except for the absence of Re in the avaroh, i.e., Kalavati has the same five notes in both aaroh and avaroh.