In the field of New Music, Sofia Gubaidulina’s “De profundis” has already achieved the status of a classic. It is not only an attainment of the New Music that instruments are capable of approaching the human voice in their sound, or that they can imitate areas of expression found in language and linguistic articulation. But the avant-garde has surely expanded the spectrum to a considerable extent. The piece for solo bayan is an impressive example of this.

The listener witnesses a slow and in...