After seeing the thread on "bumped" string sets I've thought some more on the possibility of tuning a bass up an octave. I've asked this question before but the discussion got derailed over two things. First was people suggesting solutions that did not involve a the selection of strings on a bass. Offering the use of electronics to get a different octave is off topic. Suggesting the use of something other than a "standard" sized double bass is also off topic. I pose the question here on how one might go about tuning a bass up an octave in the forum on double bass strings because I wish to tune a double bass up an octave and would like to discuss the choice of strings needed to accomplish this. The other thing that derailed the discussion last time was the fascination on why anyone would want to do such a thing. Well, think of a reason why someone might want to do this and consider that your answer. If you cannot fathom why someone might want to do such a thing then this discussion is not for you. We can discuss why so long as it does not distract from the question on how it can be done. If this bothers you that someone would do such a thing then I suggest you close your browser window and move on. I mentioned the use of a "standard" size bass but I'll define that further to avoid people suggesting I shrink a bass in the wash. For this discussion a "standard" size has a nut to bridge distance between 44 inches and 34 inches. This means a 4/4 scale bass on the top end on down to no smaller than something like a NS Design Omnibass. Anything shorter than 34 inches on scale length is not a bass or is a customized instrument and therefore cheating on the rules. The reason this came to mind again was not just the mention of "bumped" strings but also the mention of this set of strings from Superior Bassworks. The description on their website specifies that the set of six strings allow for tuning E1-A1-D2-G2 with different tensions on bass sizes from 1/2 to 4/4. Presumably these strings will hold up to standard tension so that they can be tuned to the original tuning instead of being down tuned a fourth. Six strings in the set allow not only a "bump" from an E1 string to an A1 string but a "double bump" from E1 to D2. Once at D2 then going to E2 means tightening up the tension a bit or going from a 4/4 scale to a 3/4 or 1/2. Presumably one could get a set of strings from Superior Bassworks and put in the proper selection of four strings from this six string set so that one could tune to E2-A2-D3-G3 and not over stress the strings or instrument. If this is somehow difficult to achieve with a common 3/4 scale bass (at about 42 inches nut to bridge) then a minor "cheat" to a 1/2 scale bass (about 38 inches nut to bridge) could help with this. If this is still not enough to reach the desired effect then one could choose a 1/4 scale bass for these strings. Going any smaller than that to achieve the desired tuning gets to some kind of hybrid between a double bass and bass guitar like the NS Omnibass. Any smaller and, again, is too much of a cheat that it breaks the rules where the instrument is no longer a bass and therefore outside the confines of this forum. Does this seem like a viable solution? Taking a "double bumped" set of strings but at "standard" tension so that the resulting tuning is one octave higher. Has anyone tried this?