# Title Team Members TA Documents Sponsor
67 Aliased Water Illusion Screen (AWIS)
Chaoyu Zhou
Shan Zhao
Yixiong Li
Luke Wendt
idea sponsored by Luke Wendt

Team Members:
Chaoyu Zhou (czhou16)
Yixiong Li (yli161)
Shan Zhao (szhao27)

Project Description:
During the pitching session, we heard our TA Luke Wendt talked about the Aliased Water Illusion project. The project is based on the stroboscopic effect. Essentially by adjusting difference between sampling rate, we can create an illusion of objects floating in the air or flying up. We want to create a screening wall for interior house design.

Hardware Description
The undersampling of water is achieved by having a matching frequency for the vibration of water/falling objects and the observant (usually a frame rate of a camera or the rate of flickering light if you want it to be captured by human eye). Therefore I believe our system would consists of four parts.
1. a speaker (or a speaker array) that create the right amount of frequency with a water hose attached to it
2. Array of LED light for strobing effect
3. A water pump system so we can recycle the water.
4. And of course an control system that controls all of this.

Procedure by Steps
Rome ain’t got build in one day.
We project to work on this project in the following steps.
1. We would purchase the water pump, make sure water is running alright, preferably controlled by our controller. Get the easy part out of the way.
2. Meanwhile get LED and speaker. Connect it to the controller we design. Attempt to make levitating effect.
3. Evaluate remaining time, if we have time, implement the additional music component, if not, ready to proceed to encapsulation.
4. We would reserve enough time to make sure we get to design the illusion pattern for the droplets. Luke mentioned no one has done anything like this before, for example a drop going in a loop. Meanwhile evaluate the potential of doing other medium. (For example apply the system to an huge hourglass. (God that would be fun)
5. Wrap up, finish final report and presentation.

Significance of the Project
We do realize there has already been commercialized version of this effect. But we believe through the process of innovation, we can push this idea beyond what it currently could be.

The first argument we have is utility. Right now this “gadget” is just “a nifty thing” to have or to show off. But we believe it could be so much more. In architecture design, there exists the need for a screen to provide division and privacy between rooms. Nowadays we have wood/bamboo based screen as the dominating choice for screens, alternative choices includes having a beads curtain, or a fishtank. We believe our product can fill in the void of lacking of technology centered decoration and join the competition for screens. Using an array of levitating water droplets as a screen could grant the satisfactory division and privacy (we could incorporate a piece of mosaic glass as background) like the traditional screen provide, meanwhile give an modern taste to the whole room.

If we could finish this on time, we could add in an AUX input port, having our control system read the waveform of input music and help the droplets form a pattern with it. We could’ve also add in a speaker system into it if we are doing AUX input, but that’s out of the scope of our budget and not the focus of our research. We are merely pointing out the potential room for improvement if things go well and it gets commercialized.

Thank you for your time, and this is our project proposal.

Master Bus Processor

Clay Kaiser, Philip Macias, Richard Mannion

Master Bus Processor

Featured Project

General Description

We will design a Master Bus Processor (MBP) for music production in home studios. The MBP will use a hybrid analog/digital approach to provide both the desirable non-linearities of analog processing and the flexibility of digital control. Our design will be less costly than other audio bus processors so that it is more accessible to our target market of home studio owners. The MBP will be unique in its low cost as well as in its incorporation of a digital hardware control system. This allows for more flexibility and more intuitive controls when compared to other products on the market.

Design Proposal

Our design would contain a core functionality with scalability in added functionality. It would be designed to fit in a 2U rack mount enclosure with distinct boards for digital and analog circuits to allow for easier unit testings and account for digital/analog interference.

The audio processing signal chain would be composed of analog processing 'blocks’--like steps in the signal chain.

The basic analog blocks we would integrate are:

Compressor/limiter modes

EQ with shelf/bell modes

Saturation with symmetrical/asymmetrical modes

Each block’s multiple modes would be controlled by a digital circuit to allow for intuitive mode selection.

The digital circuit will be responsible for:

Mode selection

Analog block sequence

DSP feedback and monitoring of each analog block (REACH GOAL)

The digital circuit will entail a series of buttons to allow the user to easily select which analog block to control and another button to allow the user to scroll between different modes and presets. Another button will allow the user to control sequence of the analog blocks. An LCD display will be used to give the user feedback of the current state of the system when scrolling and selecting particular modes.

Reach Goals

added DSP functionality such as monitoring of the analog functions

Replace Arduino boards for DSP with custom digital control boards using ATmega328 microcontrollers (same as arduino board)

Rack mounted enclosure/marketable design

System Verification

We will qualify the success of the project by how closely its processing performance matches the design intent. Since audio 'quality’ can be highly subjective, we will rely on objective metrics such as Gain Reduction (GR [dB]), Total Harmonic Distortion (THD [%]), and Noise [V] to qualify the analog processing blocks. The digital controls will be qualified by their ability to actuate the correct analog blocks consistently without causing disruptions to the signal chain or interference. Additionally, the hardware user interface will be qualified by ease of use and intuitiveness.

Project Videos