These are recordings made by the Leningrad Philharmonic Orchestra at the height of Soviet sponsorship of the arts in Russia. The 5th symphony was recorded in 1974 and the 7th in 1964. Given the age of the recordings you would expect some reduction in sound quality compared with modern technology but I was surprised and disappointed at how poor the sound is on these recordings. The 5th symphony starts off with the famous opening unbelievably distorted, as if the tape recorder being used had the volume level turned too high, and similar distortion occurs elsewhere. Being old mono recordings there is no separation of sound and it all comes out a bit fuzzy. Added to that these are live recordings and at times there is much background noise. Judging by the amount of coughing at the start of the Allegretto of the 7th symphony it may have been recorded during a flu epidemic. There are passages where the power and the beauty of the music survives against all the odds but unless you have a specialist interest in this orchestra or interpretations from this time I'd find it difficult to recommend this.