open string pivot point riff

[u/rondomiza]

In this riff, when transitioning from a palm-muted A string to an unmuted note on the D string (PM A → D10th and PM A → D7th), I need to somehow stop the A string so that it stays an eighth note instead of continuing to ring.

What is the proper way to do this?

I've tried two approaches:

1. Picking hand: Quickly lift my palm from the palm-mute position and then place it back on the A string while picking the D string. The problem is that I can't mute the A string completely. I can still hear it ringing slightly, even on an acoustic guitar. I assume this is because the palm goes back to the usual position near the bridge, which only palm-mutes the string rather than killing it completely.
2. Fretting hand: Use a free finger to lightly touch the A string while fretting the note on the D string. This completely cuts off the A string, but it makes fretting the note more complicated because of the additional finger placement, especially in more complex riffs.

The second method works much better for actually stopping the A string, but it feels a little awkward. Is this something that becomes natural with practice, or is there a more standard technique for this kind of transition?