Paul Baker is a musician and instrument maker, specialising in the medieval, renaissance and baroque periods. He is the leader of the costumed historical group, "Diabolus in Musica". He makes gitterns, citoles, harps, renaissance and baroque guitars, orpharions, organistra, symphonies, hurdy-gurdies, an occasional lute, and lots of other oddities.
Wonderful! I have been loving this orgen since I found on your website several years ago. Hopefully I can afford my own quite soon! You are still building them, right?
@@ThatEverydayEnthusiast Solenoids are fine for the organ workings, but they're a bit clunky for the conductor. He contains three small servos, controlled by an Arduino microcontroller housed in his pedestal.
The conductor is controlled using three notes on MIDi channel 6, which I use as the control channel. Two notes control the baton. Combinations of those two notes bieng on or off gives four possible states, which represent baton up, down left, down centre, and down right. Those positions allow all time signatures, including irregular ones, to be conducted correctly. The third control note activates the head. A short note turns the head to a random position, a long one brings it back to centre. it sounds complicated, but when writing in a MIDI sequencer or score package, note sequences can be easily cut and pasted. If you have a look at the following video, you'll see all the condutor movements in operation, although at this point, Trevor hadn't quite worked out the correct baton sequences. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xGMOMMipsJE.html
Mainly cosmetic. When I built the instrument in December 2012, there was a deadline, and I didn't have time to do much in the way of decoration. It came in for maintenance last year, and I added some frippery to make the casing less plain.
The arrangement is by Trevor ap Simon, who commissioned the organ. He's a lunatic genius, now living in Leeds. While i was building it, i revised the design of the Topsy electronics to make all the registers independent. I delivered the finished instrument to Barcelona, where he was then living, and it took him about two weeks to come up with a whole repertoire of jaw-dropping arrangements that fully exploit the possibilities. It sounds like a much bigger organ. elorganillero.com/
Kudos for stating clearly and unequivocally what so many textbooks and popular accounts get wrong: pollen grains themselves do not exhibit Brownian motion as they are far too large. It is the particles within them that demonstrate the effect. Needless to say, Einstein's 1905 paper on the subject makes this clear.
Dear Paul Baker, could I have your permission to use a clip from this video (several seconds worth) in a video I am making which will describe molecular collisions? I will provide credit to you of course. Thank you for your consideration. -- Jason Resch
My microscope, alas, is packed away at the moment. If you have access to a microscope, though, it's easy enough to reproduce the effect. Just mix a drop of milk in about 20 times that volume of water. Place a drop of the diluted milk on a slide, and cover it with a cover glass. Focus in with a 10x eyepiece, 40x objective. To get an approximate scale, change to a 4x objective, and place a ruler on the microscope table. At that maginfication, you should be able to see all of a 1mm division, which will allow you to estimate the total diameter of the field of view. The diameter of the view with the 40x objective will be 1/10 of that.
Sure. You can buy solenoids from the usual electronic suppliers such as RS and Farnell, but they tend to be pricy. You can often pick up cheaper ones on eBay (I think that's where I acquired the ones for this beastie), or nowadays on Chinese sites like Alibaba, Banggood, etc. The conductor, incidentally, is operated by miniature servos, not solenoids. But the drum, glock, wood block and triangle are solenoid driven.
Incidentally, I've just remembered - the solenoids I bought were (relatively) cheap, but they were "pull" types, and for this sort of job, it's easier to use a "push" type. Luckily, i managed to drill a hole in the end of each plunger, using a minature lathe, and add a steel rod (about 2mm diameter, I think), which protrudes through a slightly larger hole drilled in the solenoid frame, turning a pull type into a push type. Solenoids are usually made for a particular task, so you'll need to buy a job lot, ideally cheaply, and then design the mechanism around what you've acquired.
Thats great, what i thought x5 from amazon $13, thinking of resin printing a mechanism for each solenoid. The sound of your topsy id phenomenal it really is
3d printing a mechanism should work nicely, but it will take a while to knock out one for each of the glock hammers. But if you have the time... I've made various modifications to make the Topsy design more versatile, and Trevor has exploited that beautifully in his arrangements, but I can't claim any credit for the actual sound. That's all down to the heroic Mr. Smith. I just followed his instructions.
@@Gitternmaker Thats the beauty of resin printers depends on how many i can get in the vat. It takes the same amount of time to print 1 as it does to print say 12 or 15 depending on how many i can print in one go of course, but i have a large vat
Thanks! It's mainly down to three things : 1) I redesigned and modernised the electronics to make all the registers independent, which gives it more versatility than a vanilla Topsy. 2) It was commissioned by Trevor ap Simon, who REALLY knows how to arrange music for organs. The man's a genius. 3) I recorded it with studio microphones, instead of just pointing a phone at it. Most organs sound better live than they do on RU-vid.
Cool footage :) I'd like to use it in my upcoming video about amoebas. May I? You get proper credit, of course. And my video is non-commercial. Educational purposes only
If you're Einstein (he came up with the deep analysis), you can do some fierce maths to show that the detailed movement of the visible particles has to be the result of elastic collisions with smaller particles. it's not consistent with some localised wave motion of a hypothetically continuous fluid.
I appreciate this, because it's hard to find any Elizabethan music with combined instruments on RU-vid. There are just like hour-long albums of one lute.
I noticed that the particles are not moving around as much as it would in a simulation .I think this may be happening because the number of atoms in real life are vastly more from the number of atoms most simulations , so random pressure building up is less likely . Another factor , probably the most important is the size of the particles compared to the atoms , probably random pressure building up doesn't change the particles position as much , if the particles were smaller . Perhaps leading to a situation were the large particles don't move very far before they are pushed back into there previous position , resulting in this some what stationary vibration , that is not seen in simulations.
That's the problem with simulations. They're always approximations to reality, and reality is always more complex. But you could see more movement if you found a source of smaller particles and viewed them under higher magnification. It's all about relative mass.
Hello Paul, thank you for posting a great video. May I have permission to show this video to my students? I will surely credit you and your RU-vid channel
Great video. Especially the interaction due to depletion, where the globules tend to cluster. A phenomenon caused when the gap between the globules shrinks and lesser molecules collide perpendicular to separate the two in comparison to the molecules outside the two.
They're all very English. The Earl of Essex's Measures was written for him. Grimstock and Sellenger's Round are both from John Playford's "English Country Dancing Master", first edition, 1651.
The original is in the minor. This jolly, rollicking version in the major can be found in a couple of community songboooks from the early 20th century. It's totally fake as a shanty - almost cultural misappropriation - but it's such FUN.
Hi Paul, Excellent video. If I may, I would like to follow suit and share this video with my students in the future. If possible, could you share the high res video?
Hi, first of all its a wonderful video. Can I use this video for a MSD analysis project (which will not be published) in which I will try to find the diffusion coefficient of these fat globules? I will surely credit you and your RU-vid channel.
@@upandatom I've got Brownian motion coming up to a class on weds.... I have my fingers crossed that your production schedule will be kind :) Probably not!
Sorry, Gabriele. I've only just seen your question. I assume you're referring to the Brownian Motion video. If my calculations are correct, the particle diameter is of the order of 10^-5m.
THANK YOU for posting a video without any sound. I just want students to look and make conclusions on their own without the explanation being given to them!
@@Gitternmaker Legitimately the only way this could be better is if you did a series where you increased the temperature and did a side by side comparison. Really great footage. I hope you don't mind that I used it in an e-lesson for my students today.
