IFR = Improvise For Real
I heard about this program while reading Six Water Grog (blog) and have been considering purchasing the course ever since. I sent out an e-mail an received the following response for adjusting the program to Baritone Ukulele...
Thanks for writing. I think you would enjoy the video course very much, and that it will help you to learn the fretboard in a way that is both structured and relaxed. The great thing about the tuning of your instrument is that it's identical to the top four strings of the guitar, so you don't need to make any extra mental calculations to apply these concepts to your instrument. Pretty much everything in the video course will be relevant to your instrument and you'll be able to apply it immediately. The only place where I can see that you'll be somewhat more limited is in creating your own accompaniment chords on your instrument. On the guitar we have two extra strings which gives us more possibilities for combining notes together. But even in the case of building these chords, the concepts will be the exact same for your instrument. You'll just find that there aren't as many ready possibilities, so you may not need as much time to explore this topic as my guitar students would. But everything else that we learn is just exactly what you say: understanding the fretboard and learning to play by ear. So I think you'll probably love the video course and that it will take you to exactly where you're trying to go.
If you have any questions as you go through the course, you're always welcome to write and I'll be glad to help you. So I hope you'll give it a try! Here's a link back to the page for the guitar course so you can check it out for yourself:
IFR EAR TRAINING