Audio amplifier coupling issue
You are using the TL082 out of specifications,
 \$Input~voltage~range ~~\pm15V\$, in your application is almost \$17V\$ also the power supply is very near to the maximum supply voltage, you should check the voltage on your capacitors.

You could try to solve the problen choosing a common mode voltage most suitable to the application.

Probably, the opamps are out or order and you should replace it, violating \$V\tiny{ICR}\$ is a bad idea.