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  • Theremin World - Topic: The 75K "Custom Built" Theremin!!
    Theremin Buyers Guide Recommended Effects Theremin Music Theremin Method Books Theremin Apps Accessories Theremin Books Logo Gear Auctions Forums Recent Posts Most Popular Topics All Forums search search Home Forums Theremin General The 75K Custom Built Theremin Showing Posts 1 1 of 1 Posted 2 5 2016 5 57 53 PM 1 coalport From Canada Joined 8 1 2008 threads posts One of the recent Theremin World frontpage headlines showed a custom built theremin presumably made by Leon Theremin himself for sale for 75 000 00 Yes folks that is seventy five THOUSAND dollars There is no evidence that this instrument was made personally by Leon Theremin It was probably made by the Teletouch Corporation a company started by Lev in 1933 after RCA dropped the theremin and ceased manufacture Teletouch employed ten full time workers including Julius Goldberg and made everything from automatic door openers to burglar alarms They did make a few low cost theremins housed in cabinets of exactly this design but they were nothing like Lev s custom work I can only assume from the price tag on this instrument that the sellers are either nuts or do not wish to sell Theremin For Sale link

    Original URL path: http://www.thereminworld.com/Forums/T/31296/the-75k-custom-built-theremin?post=209786 (2016-02-12)
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  • Theremin World - Wilco Botermans
    Films Sounds and Audio Links Tech Schematics RCA Theremin Tech Keppinger Theremins Mods Software Resources for Builders Store Theremins and Kits Theremin Buyers Guide Recommended Effects Theremin Music Theremin Method Books Theremin Apps Accessories Theremin Books Logo Gear Auctions Forums Recent Posts Most Popular Topics All Forums search search Wilco Botermans About Website http www theremin nl Location Netherlands Activity Joined May 20 2011 Last Seen Sep 27 2015 Forum

    Original URL path: http://www.thereminworld.com/user/Wilco%20Botermans (2016-02-12)
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  • Theremin World - Topic: Let's Design and Build a (mostly) Digital Theremin!
    to get into and the sound synthesizer is buggy on my XP machine lots of trial and error coaxing to get it to start up Haven t looked at Csound yet One interesting app is SynthMaker where GUI modules are interconnected via heirarchical schematics you can drill all the way down to code and it will even produce stand alone modules and plug ins It seems to have morphed into something called FlowStone http www dsprobotics com flowstone html where the base language is Ruby Even my old version of SynthMaker is quite slick and very nicely done Anyway I examined the SynthMaker state variable filter code for any insights it might afford Turns out it s a straight up Chamberlin but there s a polynomial sine approximation for the input tuning variable which made me investigate the subject for a Hive subroutine Several days later I ve got an 8th order poly cosine worksheet in Excel with 1 2 ppm error and now need to work on a Hive version and get it documented So many digital ditches to dig link Report Post Posted 1 23 2016 12 11 18 AM 1026 dewster From Northern NJ USA Joined 2 17 2012 threads posts Normalized Sine It s rather eerie that a Taylor series polynomial can approximate as many sine or cosine cycles as you want sin x x 1 1 x 3 3 x 5 5 x 7 7 Because it only has odd powers of x sine is an odd function So the polynomial truncated to however many terms which provide sufficient accuracy may be evaluated with half the usual effort But the coefficients will have to be carefully adjusted to best fit the truncated series that we settle on First we have to decide what form the input and output will take To make the function more generally useful and to maximize resolution we can normalize the input angle z so that the full range of input produces one full rotation x z pi 2 and normalize the output to produce the full range of values over one rotation Both input and output are signed and in a perfect world the output sign would follow the input sign naturally but doing so wouldn t leave enough headroom for the calculations which must instead be performed in an unsigned manner over a single quadrant I used trial and error to obtain the coefficients which requires a fair amount of time and patience It helps to train yourself by solving the simplest case first and then working your way up In all cases the first hump in the error curve from input zero to positive should be negative and there should be as many turns in the error curve as there are terms For a 32 bit process that employs a Hive type extended unsigned multiplies i e the upper 32 bits of a 32 x 32 unsigned multiplication the errors are as follows one x term 45M two

    Original URL path: http://www.thereminworld.com/Forums/T/28554/lets-design-and-build-a-mostly-digital-theremin?post=209769 (2016-02-12)
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  • Theremin World - Topic: Building a Terpsitone
    Posts Most Popular Topics All Forums search search Home Forums Theremin Construction Building a Terpsitone Showing Posts 11 11 of 11 Previous 1 2 Posted 2 1 2016 9 22 30 PM 11 xtheremin8 From zurich Joined 3 15 2014 threads posts remember the Very Nervous System https www youtube com watch v LcVE8s2NMj4 like thai chi for musicians Bruno Spoerri used it a lot in his performances also great

    Original URL path: http://www.thereminworld.com/Forums/T/26113/building-a-terpsitone?post=209766 (2016-02-12)
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  • Theremin World - pharmacist
    Videos Films Sounds and Audio Links Tech Schematics RCA Theremin Tech Keppinger Theremins Mods Software Resources for Builders Store Theremins and Kits Theremin Buyers Guide Recommended Effects Theremin Music Theremin Method Books Theremin Apps Accessories Theremin Books Logo Gear Auctions Forums Recent Posts Most Popular Topics All Forums search search pharmacist About Location New York New York Activity Joined Feb 14 2006 Last Seen May 10 2014 Forum Posts 2

    Original URL path: http://www.thereminworld.com/user/pharmacist (2016-02-12)
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  • Theremin World - xtheremin8
    Store Theremins and Kits Theremin Buyers Guide Recommended Effects Theremin Music Theremin Method Books Theremin Apps Accessories Theremin Books Logo Gear Auctions Forums Recent Posts Most Popular Topics All Forums search search xtheremin8 ex stonemason master played bass and guitar since teen built bought theremins bent circuits and diyed synths beliefs in oscillation of everything and electricity is suspicious About Location zurich Theremins ew hardboiled modded jaycars some harrison designs

    Original URL path: http://www.thereminworld.com/user/xtheremin8 (2016-02-12)
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  • Theremin World - Topic: Etherwave Pro for Sale
    search search Home Forums Buy Sell Trade Etherwave Pro for Sale Showing Posts 1 3 of 3 Posted 1 20 2016 10 20 36 PM 1 johnthom From Minnesota Joined 3 9 2013 threads posts Happened on this today http seattle craigslist org see msg 5410331307 html link Report Post Posted 1 23 2016 7 56 47 AM 2 macteacher Joined 8 12 2015 threads posts Got it thanks so

    Original URL path: http://www.thereminworld.com/Forums/T/31292/etherwave-pro-for-sale?post=209742 (2016-02-12)
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  • Theremin World - johnthom
    and Audio Links Tech Schematics RCA Theremin Tech Keppinger Theremins Mods Software Resources for Builders Store Theremins and Kits Theremin Buyers Guide Recommended Effects Theremin Music Theremin Method Books Theremin Apps Accessories Theremin Books Logo Gear Auctions Forums Recent Posts Most Popular Topics All Forums search search johnthom About Location Minnesota Theremins Etherwave Pro and Etherwave Plus w ESPE01 and Theremini Activity Joined Mar 9 2013 Last Seen Feb 11

    Original URL path: http://www.thereminworld.com/user/johnthom (2016-02-12)
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