Yes, they are primetone picks. I like the rounded one specifically because it is so difficult to get loud volume out of it. It doesn't dig into the strings. It thus forces me to figure out how to get a loud, clear sound without digging in or just trying to play "harder." But ease of use, I like the triangle better. I have a 1.4mm with a rough logo that you can feel. I can also get loud volume from a thin pick as well, though, if I do it right. I may try at the jam all these picks and see if anybody notices the difference.
Bookmarks