Schoeps STC 4G ORTF Stereo Microphone Mounting BarThe ORTF recording method was developed empirically in the 1960s at Radio France, and was named a few years later after the larger organization to which Radio France then belonged. The system was conceived for small diaphragm cardioid condenser microphones. For ORTF recording as originally defined, STC4G offer the MSTC 64 stereo microphone as well as the STC 4 mounting adapter. The STC 4 can be used either with CCM 4 compact microphones or with