Step 2: The Mould

In order to make the bass' body a mould has to be used to give it it's shape. There are three shapes that I know of. The Gamba, Violin, and the Busetto. They are all very interesting and nothing short of beautiful and as my photo shows, I decided to make the violin style bass. In order to make the mould however, I had to draw it out on the 3/4 sheet of plywood using a grid. I had to be very careful with the placement of the corner blocks, neck block, and end pin block. Once it was drawn out, I proceeded to cut it out with the jigsaw. After it was cut out, I traced it over the sheet of plywood and cut it out again. These two mould layers were then separated in the middle with scrap wood. Finally, when the mould was cut out, I drilled a series of holes along the sides of the mould in order for the clamps to have something to grab on to.

In order to make the neck block, I assembled one out of 6 pieces that I cut out of the 2 x 10 x 12 and glued together(the last piece to be glued was thinned down by about 1/4 of an inch). I used the mitre saw to perform a dado cut on each neck block piece, I found it to be much more precise than cutting out the slot on top with a jigsaw. As for the corner blocks, I cut out four pieces measuring 8-3/4" long out of the 2 x 2 x 8. The end pin block was simply a piece of 2 x 6 that was cut to 8-3/4" in length.
Sorry, but what size is it? I've been looking up basses and found that some are 4/4, 3/4, 1/2, and so on.
<p>Great post and a good looking instrument. Please check out this link for discount bass parts http://www.janika.co.uk/Contrabass_Parts.php</p>
Hi, I'm just wondering why you didn't use hide glue? I'm looking at fixing a busted (REALLY busted) bass and considering hide glue vs. other types of glue for the repair, what do you think?
Hello, I didn't use hide glue because I couldn't find any locally where I live and I was afraid it wouldn't hold as I had never used it before. The major setback with me not using it is that the glue I used doesn't dissolve with water so if it breaks, I can't really do much :/ but then again I made the bass for fun and didn't really keep this in mind.
Thank you :) I'm suspicious of the odds because I fixed a smaller instrument (The neck of a guitar) with gorilla glue and it has held up in abhorrent climate extremes for almost a decade. That said a bass is a high tension instrument and probably actually needs the hide glue for a repair (instead of ground up construction)
Yes! We want a video.
lol just uploaded one , I hope you like it.
Thanks! Sounds great. Rich deep sound. It would be interesting to have a practiced bass player put it though its paces. With your construction gift, you should invent some new instruments!
That *looks* really cool, but can we hear it?
Yup, I just uploaded a sample video I hope you like it.
You need to change the settings on your video - it tells me it is private.
Sorry, I tried deleting my Google+ account but it messed up my entire YouTube channel, I fixed it now though, enjoy :)
I want to hear it too! It looks like an amazing project, and congratulations on the ribbon!
Thank you :) I just uploaded a little video I hope you like it.
Structurally it's a far cry from a traditional bass, but it's very creative and well made. I think you could take those skills and make a real carved or molded top bass one day.
Thank you, hopefully I can get to work on one in the near future.
How does it sound? I would love to see a video of someone playing it. Good job!!
Thank you and I just uploaded a little video to show how it sounds
That magnum gator line you used for strings?
No, they're Slap Happy weedwackers. Not the best strings but they got the job done.
I've been whining for years that I'll never afford a double bass; this has inspired me to make one! <br> <br>One question, what are the approximate dimensions for the back/front? Unless I missed it in the Instructable? Is it made from a 4 x 8' sheet of plywood?
Yup the sheet was a 4 x 8 I bought at lowes, it wasn't that expensive. Good luck on making one! <br> I got the dimensions of the bass from gollihur's website, here's the link: <br>http://www.gollihurmusic.com/faq/2-SIZES_DOUBLE_BASS_SIZING_FAQ.html
Congratulations on building such a difficult and beautiful piece. While I was not near as good as you in high school, my shop teacher made a great impression on my and now my hobby of wood working still continues. <br> <br>Good luck with your future pursuits
Thank you and good luck with your future pursuits too.
Wow! That is so cool!
Thank you!
your bass is remarkable; but even more remarkable is your incredible level of craftsmanship. those pieces could have been factory produced! that level of skill is rare. <br>don't abandon this type of work. you are one of a kind.
Thank you very much, that really made my day :)
how does it sound?&nbsp;<br> ive been a bass player since 2nd grade, and playing in the orchestra throughout my whole time at school. I used to have an upright but now I only have a couple electric basses and a few electric guitars, and an acoustic guitar (need an acoustic bass badly)...&nbsp;&nbsp;<br> &nbsp;<br> I badly want a upright again. I'm also a carpenter with a full wood shop and I might take what you did and make it my own, just curious how it sounds with your choice of wood, and if you would change anything (like the type of wood used for individual parts).
To me it sounds great but I think I would make a few changes. I would make the neck and tailpiece out of oak I don't know what it is about oak but I love it and I would definitely use bendyply rather than the one I used. Aside from that, I don't think I would change anything else.
Great project now I want to build one! <br> <br>One point I noticed is you seem to have installed your machine heads backwards. They should always be installed with the worm towards the back and the gear in front i.e. sound box side so that the gear is pushed into the worm.
Thank you and yeah I kind of rushed putting the gears together. I didn't realize it until after I was putting it on display at the competition xD

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Bio: In short I like anything that has to do with clay, chickens, pokemon, sonic and wood :P
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