In the HM system shuddh sArang is placed under kAfi thAT. It uses the scale of: S R M R M* P N S*--S* N D P M* P D P M R S. An alternate scale is: S R P^ M* P^ M* P M P N D^ N S*--S* N D M P M* R M^ *N S (*=tivra, ^=grace note).
In the ArOha of the first scale both madhyams are used. All other svarAs are tivra. This rAgA is sung during the second prahara of the day.
Halt on R and N sound beautiful. Both madhyams are used side by side in avarOha as M* P M* M R. N as nyAsA is very pleasing. In the svarA group N D M* P , svarAs D M* are quickly uttered. This creates a special effect in this rAgA. If it is not done but uttered slowly it will sound like shyAmkalyAN
In the CM system a rAgA called shuddha sArangA exists but it has no relationship with the north indian counterpart. It is a janya of riSabhapriyA and has a scale of S G M* P N S--S D P M* G R S.
extract from Raganidhi.