Strings Buzz caused by? (mid-neck to pickup)

[Michael Murray]

The buzzing happens between mid-neck and pickup. Most strings buzz.

I'm pushing down firmly with the tone bar. To stop the buzz, I really have to push down hard.

Maybe my strings need changing?

I'm a beginner, so wondering.....

Thanks,
Michael

[Jack Stoner]

Sounds like you are not "muting" the strings behind the bar. Make sure your fingers are touching the strings behind the bar.

[Lane Gray]

What Jack said. Old strings MIGHT do that. But they would have lost their ring.
If you have a video camera or a smartphone, you might try taking a video so we can see and hear what's going on.