 So I'm going to talk a little bit about the HapticCant, it's a device which we did together, one of a few devices during my master's thesis. So I'm going to start off with a motivation. Probably you have seen this slide already before in the morning event where Edke presented. So in traditional musical instruments you have visual and auditory and then Haptic feedback. But in most of the computer music interfaces the HapticQ is missing and as Edke already told HapticQ is much faster than the visual Q for example and therefore we consider it important for musical playing. So the question is how do we implement active Haptic feedback for digital instruments? And yeah this question we thought about it and yeah this is one solution which is probably not the best solution for musical playing, it's a robotic hand which simulates Haptic for grasping things which brings force to your finger. But as you can imagine it's very expensive and not very convenient. So this is another attempt from some French guys in the 80s I think, it's also very heavy built and it's also very expensive so it's also probably not the best solution though it was kind of used for academic purposes. So our design. We started with the already known fire fader from Edgar Birder, it's a fader which everybody can buy, it's quite cheap I think in the US it's like $60, is it right or $40, one fader, okay even cheaper. But the idea was to mount them vertically so Edgar's devices since now were only on the horizontal and we wanted a device which you can play also vertically. So we did a prototype using laser cut parts, yeah this is another device from a student of Edgar which uses prosthesis to give Haptic feedback, I haven't used it myself, it's made by Joe Sandler. But our device the Haptic hand is based on the open source hardware and software from Edgar and yeah you can see the schematics which are freely available in the schematic you can see two fire faders connected to an Arduino plus a motor controller and basically you need some resistors but the schematic is basically easy for everybody who can read the electrical schematic scheme. So yeah this is the Arduino we use, I mentioned already, this is the Arduino control program or IDE, you call it and yeah this is pretty much the control loop Edgar also talked about today, you have the connection via USB interface, the calculation of the force and the sound is then all on the computer and the force is sent back to the Arduino which then triggers the motor via pulse width modulation and the physical forces in the audio can be computed as I said on a laptop but they also can be computed on a Raspberry Pi too which works pretty good. So yeah we thought then because we wanted the device which you can play with four fingers how we can measure the distance like how how should the the pads which we want to play be how much should they be a part yeah so yeah what we did was a pretty simple thing so we just took like you see hand drawings from different people and yeah we put them all together and we looked at okay how does it work the similarity and how should we put our faders between our part yeah so as you can see the index finger the middle finger and the ring finger pretty much overlay from the participants of this study but there are some differences in the pinky finger how you call it the pinky yeah okay and also the thumb goes a little bit apart but we didn't want the instrument to be controlled with the thumb so we decided we only use this four fingers to control the instrument yeah that's pretty much what it says yeah and these fingers naturally also move in the same axis and yeah from this from this information we get it we came up with this prototype and yeah as you can see the Arduino board is underneath everything is packed in you have only the usb coming out and yeah i'm going to show you a short demonstration so this is a little bit close up unfortunately we don't have the device here with us because it's still in the states and it was a little bit too heavy to bring it with or too uncomfortable yeah but we have a nice video demonstration here yeah i wanted to mention also this can be played with any model from edgar but i sent a modeler we used mainly max for this device and we did some models specifically specifically for this device and yeah probably there's like only limited by your imagination right so you can play anything with it like we we tried over samples and we also programmed physical models and yeah we also tried to emulate real instruments like piano keys for example i'm giving you a short video demonstration now and as you can see with this model it's like a percussive model and it's intended to play snare roles with one or more fingers or drum rules the sound here is not so impressive it's more about the the haptic feeling which you can see here yeah so pretty much to sum it up yeah you can see the example video source online the idea pretty much is that anybody can build their own devices out of this open source components so for example we put the laser card templates online and of course the the the software is open source from edgar and all the parts are freely available and not free but are available anywhere you can buy them and yeah everybody is um can build their own devices out of this so just your imagination you know you need thank you