The principles of the spectral approach to the synthesis of interstellar radio messages (IRMs) are presented. The history
of the First Theremin Concert for Extraterrestrials radio project is given. It is shown that the NASA Beatles Transmission
radio project is inefficient from the scientific point of view. A variant of direct synthesis of analog IRMs is considered.
PACS numbers 96.50.sh - 43.75.Zz
Original Russian Text © A.L. Zaitsev, 2008, published in Radiotekhnika i Elektronika, 2008, Vol. 53, No. 9, pp. 1169–1175.