 So, all right, now we've got something a little bit special for you. We have a workshop Friday at 2 on, I think Friday at 2 at the Silas Club Music and Gerald Beam Fenderson is here to actually give kind of a demo and intro, maybe hype a little bit of your interest into attending the event and Then you're performing tonight in the same yoga studio where you can't bring your own booze because there will be free booze there So don't do it But without I guess further ado, let's welcome them to the stage and listen to this wonderful demonstration So hello, and thanks for coming to my talk I'm going to tell you a bit about my oscilloscope music project and how I started making it and how it works So you already know that this is more like a short introduction to the workshop later at the maker stage at 2 p.m And I think before I tell you about how any of this works It's probably best to show you an example of what it even is. So oscilloscope music is basically music that is visualized on Analog oscilloscope and here is the first track that I made with this technique. It's called nuclear black noise It's enough to give you an idea What this is like? So this video was filmed from an analog oscilloscope and the signal that goes into it is the same signal that goes to the Speakers, so one channel is used for the horizontal deflection and the other channel is used for vertical deflection on the oscilloscope So I first used an oscilloscope a long time ago when I did an apprenticeship as an electronic technician This is what the everyday life of an electronic technician looks like in this beautiful shutter stock image So back then all the analog Oscilloscopes were being replaced by digital ones, but for teaching purposes. We still use the analog ones and I got really into the aesthetic of that green analog screen, so Back then I was already making music and I played in bands and we tried to visualize our music in several ways So of course I would try out to play music through an oscilloscope But it didn't really look so good And I will show you an example of what music usually looks like an oscilloscope if it's not specifically made for it So here's a song by the Beatles It looks like this So it's basically just quickly something Random lines So I actually forgot about this for quite a long time, but then later as I Started playing solo electronic music shows and I got interested in sound in a much lower level like the structure of the waveforms and how they are made and Yeah, I also studied audio engineering for a while, but never finished it but with by studying this I learned a lot more about like Algorithmic composition and programming so In this time I discovered this program called pure data. Maybe some of you already know it. It's a Graphical audio programming environment. You have all these All these objects that you just connect and you can Perform mathematical operations to create your own waveforms and combine them in some ways So this patch that you can see here is actually the one that I made for nuclear black noise to the track that you saw in the beginning it is an additive synthesis patch and The way additive synthesis works is you only use sine waves and you add them up to to create different sound spectra and I have a video of that as well So here you can see I use these sliders There's the base frequency is 100 at 100 Hertz And then it's multiplied by 1 by 2 by 3 by 4 and so on and I have all these sliders to change the volume of each overtone and the way this sounds is Not audible. I'm not sure why. Oh, I think I know why It's all just sine waves put together different waveforms As soon as you have several of these tones Suddenly your perception of it is not the same anymore. You perceive it as one tone Not as several different tones. So when the frequency is changed It sounds like it's just one tone that plays The next step is to use a sine wave on the horizontal channel and a cosine wave on the vertical channel And together they would add up to a circle So here's a slightly different patch that does the same thing for XY on the oscilloscope and you can see It's It circles being drawn at the same time at different speeds. So they create these Spiral kind of shapes that you also saw in nuclear black noise and now you can see it moving That is when the frequency of one of the overtones is not Not a full number multiple of the base frequency. So here it is 401 Hertz now so it and I was changing some other frequencies as well So the image started moving and so as I uploaded my first such video to YouTube in 2013 and And I started playing live shows with that as well And in my life shows I often used a shape like a mushroom I think it's this one and So a lot of people asked me how I make this mushroom So I made a tutorial about that And the tutorial is also done completely on the oscilloscope. So That video got rather popular on reddit and so on and I think it is a good explanation How these things work? Basically the video all it does is just explaining how the video was made. So I think it's a good idea to show you this one as well Welcome good people of the internet Today I'm going to show you how to draw mushrooms on an oscilloscope with sound We're gonna use our left audio channel for horizontal deflection Now first we need a sine wave on our horizontal deflection channel and a cosine wave on our vertical deflection channel Together they add up to a beautiful circle Alter its size and shape by increasing or decreasing the volume of both channels Now we add a sawtooth waveform to the right channel Our circle or ellipse turns into a spiral To get this spiral into the shape of a mushroom We need to multiply our left channel with a sine wave of the same frequency as the sawtooth We're only gonna use the sine's last quarter Of course, we want our mushroom to move Just like in real life That's why we now add another sawtooth Multiplied with the cosine wave of a slightly different frequency to our left channel We can increase the number of mushrooms by dividing the cosine's frequency by two Or even by three By randomly adding square waves we get even more mushrooms In fact, we can plant an entire field move into space Far you go always remember to let there be loud You could see that the images went a bit beyond what was actually explained like with the 3d graphics um And but i'm going to show you a bit about the 3d graphics So here is a Here is A patch that does something like this in pure data So here you can see it drawing this mushroom landscape with a grid and a butterfly And what it actually does What I do to draw 3d images is this I draw all these All these things with three coordinates x y and z coordinates And then I just feed them into basically Audio rendering engine which works very simply I I just made everything that is further away like that has a high z coordinate smaller than the other things And then two channels come out that I can feed into the oscilloscope the same way as before So that's basically how it would also work for any 3d graphics that are shown on a two-dimensional monitor So, um, what was I gonna say? Yeah, I made an album with this in 2016 With 10 tracks of this kind of music and I teamed up with a friend named hansi Who helped me a lot on the software part of all of this And he made a program called austi studio Which takes away a lot of of the work that you have that you would have to do over and over again Like for example, the 3d rendering thing and this is austi studio here You can for example, just select one of the presets like the cube Put some perspective on it and Let it rotate And then with this program you also have For example the ability to use this trace plugin This lets you draw just a part of this line and you can hear the overtones changing or it gets more overtones The more of the image you draw This makes pretty cool sounds and when it rotates You have a constant variation of the sound so I use effects like this a lot The music that I make Now another cool thing that this program can do is we can connect to blender So many of you probably know blender and here I can just Yeah, now I sent this shape over to austi studio and now I have this cylinder here So basically this program converts 3d images into sound and one thing that is pretty important When doing so Is if you have jumps in the waveform like if you jump from here to there Then you suddenly get a lot of harsh and very loud sounds So the thing that is important is as you can see when I When I just draw a part of it that it always has to be one connected line So you can see it's It's drawing up and down all of these lines here and uh With basically the same technique I did one of my tracks or actually several of my tracks on the album But here's an animation that I made in blender with these robot arms that assemble something And You can also send the send a complete animation over to austi studio Um, however, I'm not going to do this now because it takes some time until it's all there But I can show you a clip Of how I used it Yeah, so this is a And then there comes a bicycle and the bicycle rides through a landscape and so on. Yeah, anyway, um, so I think that's pretty much it You can try out all of these things. I made a lot of patches in pure data and max msp Um, oh, yeah one one thing that I also wanted to say is in the new version of austi studio Which is not out yet, but will come out Very soon. It's been coming out very soon for about a year now There is this live coding feature where you can just write code directly in c++. It makes it very efficient to just Do some kinds of operations here, for example, if I Yeah, now I replace the x coordinate with a sign and This makes it very powerful and very efficient to work with sound So actually this opens it up for Audio programming of all times not just for oscilloscope music So, yeah, anyway, you can try out all these things that hansi and I made there Over in the maker stage from 2 p.m. I think if you have questions It's probably best if you just come over there and ask there unless you have some very pressing questions then The time is now I have a very pressing question Yeah, what's the name of this software? It's austi studio osci studio So, thank you. I have a question for the audience actually So who here is going to be anywhere near seattle this coming wednesday? few people, okay, so um, so uh, jerobe and fember sift kunderson is going to be doing um So he's going to be doing a show in the laser dome at the pacific science center on wednesday night For I guess the first time ever with the laser So basically driving the laser galvo is directly with the sound audio signals, so If you happen to be around on wednesday night, um, there are tickets available I think we sent out some links if you go to ateasbooks.com. It's on the events page. It's being increased by ateas books So come check it out. Sorry, what's that? Yes, uh-huh. Yeah All right, thanks