Guys do you have any idea/tips/techniques about playing ukulele by ears?
The first tip to playing ukulele by ear is to strum only with the very tip of your earlobe. Otherwise you'll catch the whole ear in the strings and it can be painful!
Ah, but seriously...
Learning to figure out songs by ear is basically a two-pronged approach. The first things is that you just have to do it. You have to dive in and start tackling a song, even though it's hard and you're not good at it yet. Pick an easy melody like "Happy Birthday" or "Twinkle Twinkle" and work your way up from there. There's no substitute for experience.
The second "prong" is to learn a basic framework of music theory knowledge. This acts as a sort of roadmap for what the next note/chord is most likely to be. It narrows down the almost infinite possibilities to just a handful of candidates.
For example, if you pick out a few notes and you happen to know that the notes all come from the C major scale, then it's a pretty good chance that the song is in the key of C. That's going to really narrow down the most likely chords that you'll play.
Once you get good at picking out melody lines, you can start picking out other notes in a song. Especially the notes that the bass is playing. Bass notes will really help you narrow down what a chord is, because the note the bass is playing is frequently the same letter that the chord is.
Okay, that's a lot of gobblety-gook. But to sum up: You get better at picking out songs by
doing it. And music theory knowledge will help too.
JJ