CD player to RIAA signal converter

I need information on how I could transform the signal from the CD player into an RIAA signal.
In fact, I often need to test phono inputs in my workshop and it is tedious to have to connect a vinyl turntable each time when I lack space so I come here to ask if anyone has already looked into the question or knows a ready-made solution to transform the signal from a CD player into a good quality RIAA signal.
AND yes, I can generate a signal with my generator but that does not give an idea of the sound quality of the phono preamp.
 
I fond that
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