Shruti Box Drone (SURPETI) - Surpeti, also called "svar petkhi", "svar peti", "svarpeti", "sur peti", "sruti box" is an Indian tone tool. This is a small box, the only function of which is to set the basic tone. There are two main types of it - one is manual, the other is electronic.

Manual surpety is very close to the Indian harmonica (* harmonium, accordion - a small floor harmonium, originally brought to India from England, but quite successfully "acclimatized" there; the sound is extracted by the air generated by the bellows, and the melody is created by pressing the keys - the usual range 2 -4 octaves. The Shruti Box (SURPETI) is a popular instrument both in the South and in the North of India, It is a small brass organ of a reed, but unlike harmonics, it has no keys and you cannot play melodies on it. spirit manually via a small fur.
In recent decades, the electronic version of surpeti has become popular (* it is they who are most often called "shruti boxing", ie "box for singing"). The first shruti boxes simply could only be plugged in and transferred - they were extremely unreliable. However, the development of electronic technologies has brought them to a very high level of opportunities. Today most often this device simulates the sound and main tones of a tambour. Most often, this type is called an electronic vestibule.
Custom library Shruti Box Drone, I made from drone samples.
Samples used from the album - Shruti Box Drone All 12 Tones by Alex Xander Jacobs
Samples of notes C, D, E, F, G, A, B, C #, D #, G #, F #, A # - - the second octave, then you went further.
The duration of each note (one) ~ 1 minute, if suddenly someone wants to edit.\

Publisher: Alex Xander Jacobs
Website: musicforspiritualpractice.bandcamp.com/album/shruti-box-drone-all-12-tones
Format: KONTAKT 5.8
Quality: 24 bit 44.1 kHz stereo