Sai (a.k.a Yasen Penchev - bass, guitars, keys, drum programming) is a dedicated studio project that has been evolving a lot throughout the years. At its core lies experimentation with both analogue and digital recording techniques, as well as extensive use of various string instruments. The end results vary from minimalistic ambient atmospheres to furious polyrhythmic drum patterns syncopated with ultra-low- tuned guitars and progressive structures. Yasen Penchev has contibuted as a guest musician, composer, mixing and mastering engineer to a wide scope of musical projects ranging from ambient, through rock bands, to hip hop and pop music. Sai's music is usually fitted under the Post rock, Math rock, Ambient and Trip rock genre labels.