John Dipper Posted July 7, 2023 Share Posted July 7, 2023 Coffee break at the concertina hospital - we were wondering about making a prime concertina - 5 sides on the right, 7 sides in the left - with crazy bellows… Anglos would have either 31 or 37 buttons. 97 for English systems. What else would the prime concertina have? 1 1 Link to comment Share on other sites More sharing options...
wunks Posted July 7, 2023 Share Posted July 7, 2023 (edited) Chromatic down to low cello C, well balanced high and low. Duet based on the Jeffries ( Anglo ) fan shaped button arrangement for speed and ease of fingering. Centered on the key of D for ease of play in D,G, A and C with a G to C# overlap. Bi-sonoric G#/Bb and perhaps some low notes for space considerations. RH Air thumb key co-opted for Bass notes. Air moved to 2 highest note buttons for dual control. Reasonably sized ( 7.25" equivalent ). Make me one soon please 🤣 Edited July 8, 2023 by wunks correction Link to comment Share on other sites More sharing options...
Steve Schulteis Posted July 7, 2023 Share Posted July 7, 2023 5 or 7-fold bellows, I suppose. Make sure to count the holes in the fretwork as well. Link to comment Share on other sites More sharing options...
Paul_Hardy Posted July 7, 2023 Share Posted July 7, 2023 9 hours ago, John Dipper said: Coffee break at the concertina hospital - we were wondering about making a prime concertina - ... Anglos would have either 31 or 37 buttons. 97 for English systems. Don't you mean 47 buttons for English? Maybe 53 or 61 for extended range? 97 would be prime but excessive. Link to comment Share on other sites More sharing options...
JimR Posted July 7, 2023 Share Posted July 7, 2023 Three holding points, think EC with wrist strap, on both versions. And the fretwork shows all primes, given space available. Link to comment Share on other sites More sharing options...
malcolm clapp Posted July 8, 2023 Share Posted July 8, 2023 (edited) Tuned to A:443, or maybe A:439 (Just wondering what as in the coffee, John?) Edited July 8, 2023 by malcolm clapp Link to comment Share on other sites More sharing options...
Theo Posted July 8, 2023 Share Posted July 8, 2023 The ultimate prime concertina would have the notes tuned to prime number frequencies, but no human would want to listen to it. Link to comment Share on other sites More sharing options...
Chris Ghent Posted July 9, 2023 Share Posted July 9, 2023 Why shy away from the first prime number; 2. Link to comment Share on other sites More sharing options...
Anglo-Irishman Posted July 9, 2023 Share Posted July 9, 2023 I assume the concertina would have 2 ends, anyway. So in a way, all our bellows-driven instruments are prime. Link to comment Share on other sites More sharing options...
Leah Velleman Posted July 9, 2023 Share Posted July 9, 2023 On 7/8/2023 at 5:14 AM, Theo said: The ultimate prime concertina would have the notes tuned to prime number frequencies, but no human would want to listen to it. A just intonation instrument could use prime ratios -- humans like those. 3:2 for a fifth, 5:2 for an octave and a third... Link to comment Share on other sites More sharing options...
RAc Posted July 9, 2023 Share Posted July 9, 2023 On 7/7/2023 at 10:49 PM, JimR said: And the fretwork shows all primes, given space available. Alternatively a design based on primulas. Link to comment Share on other sites More sharing options...
Jake Middleton-Metcalfe Posted July 15, 2023 Share Posted July 15, 2023 (edited) 1 free prime concertina given to each new Amazon prime subscriber, so long as the subscribers subscription is a prime number in the list of all subscribers Edit: you might have to make a lot of them though Edited July 15, 2023 by Jake Middleton-Metcalfe 1 Link to comment Share on other sites More sharing options...
RAc Posted July 15, 2023 Share Posted July 15, 2023 5 hours ago, Jake Middleton-Metcalfe said: 1 free prime concertina given to each new Amazon prime subscriber, so long as the subscribers subscription is a prime number in the list of all subscribers Edit: you might have to make a lot of them though Prime example for a thread in its prime, isn't it? Now top THIS! 😝 Link to comment Share on other sites More sharing options...
Clive Thorne Posted July 16, 2023 Share Posted July 16, 2023 (edited) On 7/9/2023 at 1:58 PM, RAc said: Alternatively a design based on primulas. Mmmm Cheese. ........ Oh, I see, that sort of primula 🙁 EDITED FOR CLARIFICATION: IN the UK "Primula" is a brand of cream cheese. Edited July 17, 2023 by Clive Thorne Link to comment Share on other sites More sharing options...
SteveS Posted July 16, 2023 Share Posted July 16, 2023 (edited) Why not make 2 asymmetric concertinas - both prime numbers and mathematically related so as to form the secret and public keys of an asymmetric encryption key pair. Of course, you'd get to play one of them only if the other is present in the same room, otherwise, they'll just play jumbled up notes. Edited July 16, 2023 by SteveS 1 Link to comment Share on other sites More sharing options...
RAc Posted July 16, 2023 Share Posted July 16, 2023 5 hours ago, SteveS said: Why not make 2 asymmetric concertinas - both prime numbers and mathematically related so as to form the secret and public keys of an asymmetric encryption key pair. Of course, you'd get to play one of them only if the other is present in the same room, otherwise, they'll just play jumbled up notes. Seriously? I wasn't aware that quantum entanglement stops at bedroom doors... Link to comment Share on other sites More sharing options...
conband Posted July 17, 2023 Share Posted July 17, 2023 It would definitely need an exra button on each of the three ends to automatically correct all wrong notes. Les Link to comment Share on other sites More sharing options...
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