Major 7 double stops

Why do you think you need to play Maj7 double stops?

Sounds like you need to learn some to theory. And not from the internet...
The reason why you may want to play Maj7 double stops on bass, is that it is the way you can comp using shell voicings on bass. This is best explained in this series of excellent tutorials by Chris Fitzgerald (who knows quite a bit about theory...). Chris shows it for double bass, but it is completely transferable to BG.


 
The reason why you may want to play Maj7 double stops on bass, is that it is the way you can comp using shell voicings on bass. This is best explained in this series of excellent tutorials by Chris Fitzgerald (who knows quite a bit about theory...). Chris shows it for double bass, but it is completely transferable to BG.




Ok guys, I apologize for my original tone. As for shell voicings on bass? Well, I don't think of bass as a chordal instrument. I play guitar also and of course know what shell voicings are. I guess they MIGHT be useful on bass for soloing. But ACOUSTICALLY, since they're extremely dissonant, I hold fast that they just don't work in lower registers of a musical fabric.

And THAT was the crux of the OP's question, wasn't it? "I play these intervals but why do they sound bad?" EXACTLY my point. They sound bad, in low registers, because acoustically they ARE bad.

But to each their own. OP, or anyone here on TB, could in fact be this generations Jaco. Just that the vast majority of gigs don't even get close to music that's that far out that Maj7 double stops will be called for.
 
The reason why you may want to play Maj7 double stops on bass, is that it is the way you can comp using shell voicings on bass. This is best explained in this series of excellent tutorials by Chris Fitzgerald (who knows quite a bit about theory...). Chris shows it for double bass, but it is completely transferable to BG.



WOW, that guy is a GREAT instructor! Really makes me want to learn DB!