The TDA1524 or TDA1524A is a very old stereo volume and tone controls IC. It is not made anymore and is not in stock at the two largest American electronics parts distributors.
I have no problem with the IC My problem is the PCB, I have a transparency of the board but all is done by software these days. I need two boards 70 x 40mm after which if the project works I can go to a specialist supplier for 50 - 100 copies.