Are there any voice instructional DVDs?

What are the best instructional DVDs for learning proper bass-guitar technique and why?

• Please Specify: - what type of music it is for - who made the DVD and why they're reputable Related Question for guitars:

• Answer:

  This hinges on how you define "proper bass-guitar technique." It also depends a lot upon your current playing level. Either way, I wouldn't limit your quest to DVDs. We've got this thing called the Internet. I think Marlowe DK's instructional vids are pretty great. Here's his site: http://playbassnow.com/ And here's his YouTube Channel: http://www.youtube.com/user/MarloweDK