qyin@andrew.cmu.edu – 18-090 https://courses.ideate.cmu.edu/18-090/f2017 Twisted Signals Thu, 07 Dec 2017 05:03:31 +0000 en-US hourly 1 https://wordpress.org/?v=4.8.24 https://i1.wp.com/courses.ideate.cmu.edu/18-090/f2017/wp-content/uploads/2016/08/cropped-Screen-Shot-2016-03-29-at-3.48.29-PM-1.png?fit=32%2C32&ssl=1 qyin@andrew.cmu.edu – 18-090 https://courses.ideate.cmu.edu/18-090/f2017 32 32 115419400 Two-person synth – JEENA https://courses.ideate.cmu.edu/18-090/f2017/2017/12/06/two-person-synth-jeeeena/ Thu, 07 Dec 2017 00:28:38 +0000 https://courses.ideate.cmu.edu/18-090/f2017/?p=1575

I built a system that uses two Kinects to track the movements of two dancers, a digital synthesizer that generates sound solely depend on the skeleton data, and a particle pattern visuals that changes based on both the skeleton data and the sound itself.

For the Kinect part, I use the head height of two users, and the distance between their hands, and their body left-right positions. In order to create the best performance, if any of those data from one of the Kinects stops changing, which indicate the person might have moved out of the range of the Kinect, I reset the values of the sliders that is sending midi data to the synthesizer, so that the filters might not be accidentally set to a very low point.

For the synthesizer part, I strip the sound into two parts — one is manipulated by the filters, and one is not to decrease the chance that the sound might be completely turned off during the performance. The synthesizer has 13 presets that allow people to choose from as starting point.

In the particle pattern visuals, the pattern is distorted by the sound, and the size of the pattern is controlled by one of the dancers. Also, depend on where the two dancers are at, the particles will move left or right with the dancers.

code

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1575
Project 1 – Automated Lighting System https://courses.ideate.cmu.edu/18-090/f2017/2017/10/29/project-1-automated-lighting-system/ Mon, 30 Oct 2017 01:25:54 +0000 https://courses.ideate.cmu.edu/18-090/f2017/?p=1390

This patch analyzes audio in three ways and represents the information through a LED light pattern.
The 30 LED lights are grouped into three subgroups, where there’s an inner layer consist of two lights, a middle layer consist of a ring of 10 lights, and an outer layer of 18 lights. Changes of colors or brightness happen from the inner ring to the outer ring, so that the light propagates outwards.
The audio amplitude controls the brightness(saturation) of the colors. The ratio of lower frequency to higher frequency controls a color picker, which determines the RGB values. Then the values are being sent to the three layers with different amount of delay.

Code:


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-----------end_max5_patcher-----------
]]>
1390
Assignment 4 – Vocoder using fft https://courses.ideate.cmu.edu/18-090/f2017/2017/10/15/assignment-4-vocoder-using-fft/ Mon, 16 Oct 2017 03:27:39 +0000 https://courses.ideate.cmu.edu/18-090/f2017/?p=1331 I use fft to build a vocoder controlled by three keysliders. Here’s a quick demo of how it works! In the demo I played a clip from “I’m sitting in a room” at different speeds plus at different directions.


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]]>
1331
Proposal 1 – Lighting System https://courses.ideate.cmu.edu/18-090/f2017/2017/10/02/proposal-1-lighting-system/ Tue, 03 Oct 2017 01:09:32 +0000 https://courses.ideate.cmu.edu/18-090/f2017/?p=1269 For my first project, I want to create an audio controlled lighting system that uses delay, fft and data smoothing techniques to transform audio signal, and presents the sound pattern via multiple ways. Here are 2 ideas of how I might visualize the audio:

  1. Group the 30 lights into 3 subgroups, and use time shifting to create a wave effect from the center, and use fft to control the colors.
  2. Use fft to change the color but start from a random light, and propagate the new color to nearby lights.
]]>
1269
Assignment 3 – Unsatisfying Jam Sessions https://courses.ideate.cmu.edu/18-090/f2017/2017/10/02/assignment-3-unsatisfying-jam-sessions/ Tue, 03 Oct 2017 00:48:26 +0000 https://courses.ideate.cmu.edu/18-090/f2017/?p=1263

I managed to smash a few piano keys to put together this piano improvisation. The original piano sound was very boring and uninterested. So I decided to throw my piano into a metal box. Here’s how it should sound like… if I’m playing the piano in a metal box!

The metal box is not interesting enough. because I want the whole building to hear me. So I played in the stairwell.

Hm…. the elevator started to going up and down…

Actually, I want to play the piano in a flushing toilet because it should sound greater. I love toilet!

Piano is too boring. I want a VIBRAPHONE instead!!!!!!!!

The vibraphone sounds GREAT!!!!!! I ended up flanging the sound around using an LFO, and made this trippy wobbly vibraphone version of my piano improvisation. Enjoy!!!!!!!

IRs:


Metal Box IR was created by putting the mic in a metal box, and hitting the box with a drum stick very hard.
Stairwell IR was created by dropping the extraordinarily heavy computer music tutorial book a whole floor.
ElevatorStairwell IR was created by dropping the extraordinarily heavy computer music tutorial book a whole floor while the elevator right next to the stairwell is moving.
Toilet Flush IR was created by flushing a toilet.
vibraphone IR was a recording of me playing vibraphone.

Code:


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]]>
1263
Assignment 2 – A hands free lighting control – in progress https://courses.ideate.cmu.edu/18-090/f2017/2017/09/17/assignment-2-a-hands-free-lighting-system-control-in-progress/ Sun, 17 Sep 2017 23:39:27 +0000 https://courses.ideate.cmu.edu/18-090/f2017/?p=834 My goal is to create a Max patch that changes the lights based on audio frequencies smoothly, i.e. with slow-motion effect. So far, I’ve gotten the light to change corresponding to the amplitude of the sound. I used delay on audio, and I embedded a new patch that “smoothes out” the fast changes in amplitude detected by the microphone. So far so good! Here’s a video on the current effect of my patch. Now, you might see abrupt changes on the desktop reflection of light. That’s because I haven’t gotten each individual light to change smoothly, but I did on the overall effect.

Music by Pink Floyd “The Great Gig in the Sky”.

Code:


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]]>
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Assignment 1 – Jeena Yin https://courses.ideate.cmu.edu/18-090/f2017/2017/09/05/assignment-1-jeena-yin/ Tue, 05 Sep 2017 17:19:56 +0000 https://courses.ideate.cmu.edu/18-090/f2017/?p=688

This is a video that shows how Google Translation can distort the meanings of a poem by recursively feeding the translation results back to itself and translating to random languages 60 times. The original poem is in Chinese, and very well translated into English. The title is Facing the Sea with Spring Blossoms by HaiZi, a Chinese poet.

From tomorrow on, I will be a happy man.
Grooming, chopping and traveling all over the world.
From tomorrow on, I will care foodstuff and vegetable.
Living in a house towards the sea, with spring blossoms.
From tomorrow on, write to each of my dear ones.
Telling them of my happiness.
What the lightening of happiness has told me.
I will spread it to each of them.
Give a warm name for every river and every mountain.
Strangers, I will also wish you happy.
May you have a brilliant future!
May you lovers eventually become spouses!
May you enjoy happiness in this earthly world!
I only wish to face the sea, with spring blossoms.

After 33 random translations:

ur
You know you went to the world,
Cooking vegetables and vegetables
I am a source of water and water
In the morning, family relationships
Stories, history
It’s a good vaccine
Everyone says,
He was always his name
I do not believe
if you want to
Hence
the poor
Chicken in the ocean

After 60 random translations:

road
You know, I go in the world
All full of fruit
Water and Water Resources
It is very close to me in the morning
History, history
It is the perfect solution.
a total of
It is always the name of the
I always thought,
If you want to
yes
bad
Poland

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