The old 741 opamp is poor for audio.
It is noisy and has a max output response to only 9kHz.
The LM837, TL074 and OPA4134 quad opamps have low noise and a max output response to 100kHz and higher. They will be much better in this circuit.
Add a 100 ohm resistor in series with the output to prevent the output opamp from oscillating if it must drive the high capacitance of a shielded cable.
The Uashem site has every project that Electronics-Lab has including all the errors and even has my projects!