Assignment – 18-090, Fall 2019

kabruzzo – Project 1 – Audio Signal Processing With Sensors

kabruzzo@andrew.cmu.edu — Wed, 06 Nov 2019 04:40:38 +0000

For my first individual project, I decided to work with Arduino because I really enjoyed the videos shared on Slack on interactive sound installations. I also have worked with Arduino before, and thought it was cool that you could have it output to Max. I decided to work with flex sensors because I haven’t worked with type of sensor before and thought it was interesting. I also use a potentiometer.

I used a feedback system to create an echo. One of flex sensors pitch-shifts the echo, another one sets the delay of the echo, and the last one sets the volume for the echo. There’s also a degrade that goes from a resolution of 0 bits to 10 bits, then back from 10 bits to 0 bits in a loop. The rate at which the resolution changes is set by the potentiometer.

Video of me changing some of the sensors and the resulting audio

Recording of audio where I used the sensors to process the song Na Na Na by My Chemical Romance

Google drive: https://drive.google.com/drive/u/1/folders/15FI85RAck9Aa7uP0DOmOIj3rCryVGnxx

Kabruzzo – Assignment 4: Chlorine fft

kabruzzo@andrew.cmu.edu — Wed, 16 Oct 2019 02:06:11 +0000

For this assignment, I decided to use the cubey-fft patches we made in class as a starting point. Instead of using jit.mo.sin to set the position, I used the amplitudes of the audio signal. I did this by making a matrix with three planes and setting the values in the pfft. I also changed the color and shape generated, and used Chlorine by Twenty One Pilots for the audio signal.

Google drive: https://drive.google.com/drive/u/1/folders/10HVZOsRGqB9YmebxQ9y7pLAmwNyv2J9W

Kabruzzo – Assignment 3: Convolving Drew Gooden

kabruzzo@andrew.cmu.edu — Thu, 03 Oct 2019 06:14:17 +0000

For my original audio, I used the audio from a vine by Drew Gooden. This is the original audio:

My first impulse recording was taken in a hallway in Baker Hall by recording the popping a balloon. The second impulse recording was taken in the courtyard in Mudge using the same method. My first experimental impulse recording was a ringtone. For the second experimental impulse recording I reversed the original audio and added a tempo change of -25%. Here are each of the impulse recordings:

Here are the convolved signals:

google drive link: https://drive.google.com/drive/u/1/folders/1IjURagJg5kqgJC3mnuv69d9FneUeMlrJ

atunnard, assignment 2: orchestra warms up: A

atunnard@andrew.cmu.edu — Wed, 18 Sep 2019 04:41:47 +0000

This patch takes an input, runs it into a delay with feedback, then sends the output of that signal into two delays, one in the left channel and one in the right. each of those two signals feeds back into itself, as well as into the input of the opposite side’s signal. for each three of these delay chains, the delay time and pitch modulates randomly. from there, the pitch modulation effect from the feedback is mitigated by a pitch corrector, which fixes each note (or rather, attempts to) to an A. this semi-randomly modulated signal, paired with a nearly-self-oscillating delay chain and enforced pitch effect, creates irregular swells and digital artifacts within a smooth wave of delay.

drive: https://drive.google.com/drive/folders/1fgAeqN-eK4_rT5vyeMRwL-Cu93NiJY-h

sample sound from: https://www.youtube.com/watch?v=RHSbZBuqOvU

Kabruzzo: Assignment 2 – Echos of a Truce

kabruzzo@andrew.cmu.edu — Wed, 18 Sep 2019 04:06:16 +0000

I took the song Truce by Twenty One Pilots and used a delay with feedback. The delay is 0.75s long, and each time it repeats the volume is multiplied by 0.65 and the sampling rate is lowered to 0.4Hz. The resulting effect was similar to an echo. I choose the song Truce because it’s a slower song and I thought it would sound nice with an echo.

Link to google drive: https://drive.google.com/drive/u/1/folders/1TvdzJoAuPSR6QbU16iHvAaTR8X0kJjw-

mychang — Assignment 2: d/dt

mychang@andrew.cmu.edu — Wed, 18 Sep 2019 01:14:24 +0000

This patch makes use of two patches we have seen in class. One is the patch where we combined two video signals by overlaying one on top of another; the other one is the patch where a delayed video played next to the real video. By adding a RGB analyzer, I made a patch that has a time shifted frame overlayed on top of the real-time video, where the particular time frame was chosen from the past with the RGB values of the current frame. By moving around and messing with my desk light, the RGB values changes and random frames flicker on the screen. If I try to stay still, one frame will be chosen and shows as a stilled image.

In the video, I first stayed still in a few positions, producing the same average RGB values over a period of time and hence one frame was held still each time. Then I started moving around a bit more and putting my hand on and off the webcam, producing a continuous flashing of frames from the past. I call this assignment d/dt because a video is only produced when there are changes in the RGB values; otherwise, it is more like a plain image.

Kabruzzo – Assignment 1: Super Saturation

kabruzzo@andrew.cmu.edu — Wed, 04 Sep 2019 03:44:21 +0000

My “readymade” system is the online photo editing website fotor.com. The website allows users to make basic edits to photos, such as changing the brightness, contrast, sharpness, and saturation. I decided to use the saturation tool to see how much it could alter an image.

I used a photo I took of a dog. For each iteration, I increased the saturation by 25. I continued to do this until there was no noticeable difference when I continued to increase the saturation, which occurred around iteration 50.