I have quite a few dubs of Melodiya master tapes (15ips 2 track) that I obtained from Russia. The quality of the recordings is generally very high. However, Melodiya records have been known to have just average quality vinyl pressings. Starting in the late '60s and through the next 15 years or more, EMI had a license agreement with Melodiya and issued a very large number of their recordings (derived from their master tapes, IIRC) on their full price ASD label and also on box sets. This extended to the digital era. I think I have all the analogue recordings that they issued. Many great performers and less well known Russian (and Soviet) composers. I did a quick scan of my EMI collection and there are 230 Melodiya albums (including a fair number of box sets). Some of the great conductors are Mravinsky, Rozhdestvensky, Kondrashin, and Svetlanov. Artists include Gilels, Richter, Kogan, Oistrakh, Vishnevskaya, and Rostropovich. The quality of pressings is at the typically very high standards of EMI (British pressings). There are also many Angel (American EMI) pressings of Melodiya recordings - pressings are generally not as good as the British.
Larry