Raga Sorath is an Indian musical raga (composition) that appears in the Sikh tradition from northern India and is part of the Sikh holy scripture called Sri Guru Granth Sahib Ji or SGGS for short. Every raga has a strict set of rules which govern the number of notes that can be used; which notes can be used; and their interplay that has to be adhered to for the composition of a tune. In the SGGS, the Sikh holy Granth (book), there are a total of 60 raga compositions and this raga is the Ninth raga to appear in the series.
Besides Guru Nanak Dev Ji, Sorath was used by Guru Amar Das Ji, Guru Ram Das Ji, Guru Arjan Dev Ji, and Guru Tegh Bahadar Ji for a total of 150 hymns plus numerous slokas.
Raga Sorath conveys the feeling of having such a strong belief in something that you want to keep repeating the experience. In fact this feeling of certainty is so strong that you become the belief and live that belief. The atmosphere of Sorath is so powerful, that eventually even the most unresponsive listener will be attracted.
Sorath, the older raga from which Desh is derived. The two are very similar. The major difference is that in Sorath the descent from ma to re is taken as a single glide or meend without explicitly showing the intervening note ga, while Desh uses ga explicitly. The explicit use of ga made Desh very sweet and appealing as compared to Sorath and it rapidly overtook the older raga in popularity.