Original Dynamic Frequency Curve of the CD
B= Correction of the signal
F= Application of a filter with -3 dB at 20 kHz.
C= Second correction in accordance with the RIAA curve.
This corrected signal is attenuated to the low level of an mm cartridge
and fed to the phono stage of the (pre-)amplifier and is treated as any
signal coming from a phono cartridge.