This awesome bass line was played on a vintage Fender Precision. Nothing unusual about that but using slap technique with a P is not the norm. The tone is so cool though and just goes to show that there are no rules.
In this video lesson, I break down then main line and then show you the technique behind it as well as how to get the line to groove. It's a really good bass line to work on controlling your technique and timing to really sit in the pocket.
Treasure (Bruno Mars) Drum Beat Backing Track
Set your metronome to 116BPM and practise locking into the groove, making sure not to rush the pops. I use the exercise in the following video a lot to hone my timing on new bass lines I'm working on.
Here's the original line.
This is a live version from the Billboard awards in 2013. The bass from about 3 minutes 50 seconds to the end is utterly outrageous!