RCA Studios, Toronto

Recording and mastering studio in Toronto, Ontario. Operated under this name from 1954 until 1979, it housed two recording studios, Studio A and Studio B.
Sometimes as RCA Victor Studios, Toronto
Records cut at this studio are identified by "T.O.", "TG", "GT", "TXG", "TXD" "TD", "XT", "ZDT", "TX", "DT" etc. etched in the deadwax/runout.

The "T" stood for Toronto and the other letter(s) indicated the quality of the source material used, sometimes used in combinations:
G = good source
X = poor source (distortion, sibilance, pops, etc.)
D = source had distortion
Z = source had sibilance

Originally founded in 1948 by Toronto media company . Around the same time, started a recording operation in the Royal York Hotel.
In 1954 sold the studio to .
In 1979 [l=RCA Limited] sold the studio to and renamed to .

Engineers known to have worked there (and McClear Place):
1948-1979 [a=Bill Dowding] (1979 to 1983 at McClear)
196x-1973 [a=Fred Burchill]
1962-1967 [a=Peter Houston] (etch as "PH")
1964-1966 [a=Graham Newton] (etch as "GN")
1965-1975 [a=George Semkiw] (etch as "GS")
1969-1976 [a=Hayward Parrott]
1969-1971 [a=Phil Sheridan]
196x-1976 [a=Alan Moy] (etch as "GAM")
196x-197x [a=Alex Downie]
196X-1979 [a=Jim Morgan] (left early 1970s to join [l=Captain Audio], returned as Chief Engineer 1976-1979)
197x-197x [a=John Curl]
197x-197x [a=Cub Richardson]
197x-1979 [a=Bill Cuddihy] (also in 1980s at McClear)
197x-1979 [a=Kevin Fuller] (etch as "KF" and "K.E.F.", also at McClear in 1980s)
197x-1979 [a=Colin Murphy] (also in 1980s at McClear)
197x-1979 [a=Mark Smith (9)]
1974-1979 [a=David Balan] (1979 to 1987 at McClear)