Download TIIC2015- 7Deadly Synths, a non contact

EEL4924C Senior Design
Final Design Report
Spring 2015
Title: Non-Contact Synthesizer
Team: 7 Deadly Synths
Submitted By:
Troy Bryant
[email protected]
(321)525-6792
Sean Lyons
[email protected]
(321)289-8729
Videos can be found at our youtube channel:
https://www.youtube.com/channel/UCk2SaEY
NehMW4xsHywsIrdQ
Pictures, and more interactive descriptions are
found at our website
7deadlysynths.wordpress.com
Table of Contents
Abstract ......................................................................................................................................................... 4
Project Features ............................................................................................................................................ 4
Technical Objectives ..................................................................................................................................... 5
Analog Hardware ...................................................................................................................................... 5
Digital Hardware ....................................................................................................................................... 6
Software Sound Generators/Effects ......................................................................................................... 7
Power Supply ............................................................................................................................................ 8
Technology Selection .................................................................................................................................... 8
Processor................................................................................................................................................... 8
Audio Output ............................................................................................................................................ 8
User Interface ........................................................................................................................................... 9
Analog Synthesizer Modules ..................................................................................................................... 9
Power ...................................................................................................................................................... 10
Bill of Materials ........................................................................................................................................... 11
Division of Labor ......................................................................................................................................... 12
Gantt Chart ................................................................................................................................................. 14
TI Innovation Challenge Information .......................................................................................................... 15
Appendix ..................................................................................................................................................... 18
Schematics .............................................................................................................................................. 18
Code ........................................................................................................................................................ 32
Abstract
The history of the electric synthesizer dates back to the late 1800’s, since that time many
different synthesis techniques have been invented and explored. Robert Moog built a modular
synthesizer prototype in 1963, which combined with advances in solid state electronics, allowed
synthesizers to become commercially available. Since that time many artists from the Rolling Stones to
Depeche Mode have used synthesizers in popular music.
The digital age ushered in even more growth for synthesized music. Software synthesizers &
mixers are now widely available and affordable. The electronic dance music movement- which is a
product of the synthesizer- was recently estimated to be worth 6.2 billion.
While electronic and digital music is enjoying a renaissance, there is a need to innovate and
create something radically new. Just as the modular analog synthesizer and software synthesizer
changed the way musicians envision soundscapes, we would like to create an instrument that is
completely novel.
Music creation can be influenced by the instrument that it is performed on. By connecting to
motional instead of tactile touch, we feel that we can create a new way to interact with an instrument.
A touchless keyboard enables the body and mind to come together in the act of composition. It also
opens the door for persons who have disabilities that impair their fine motor skills to play music.
Infrared technology has been used for years in various remotes, it is now a simple and cheap
way to influence electronic circuits wirelessly. The Seven Deadly Synths is a senior design project that
aims to control both analog and digital synthesizers using a large scale infrared array.
Project Features
This non-contact synthesizer includes an analog synthesizer and a digital synthesizer, each
offering different capabilities. An array of infrared (IR) sensors act as the user interface and detect ‘key
presses’ by constantly monitoring the distance of the user’s hand from the sensor, implementing a
contactless macro keyboard. These key presses are relayed to either the DSP or the analog modules to
trigger sound events.
The digital synthesizer consists of a digital signal processor (DSP) and a suite of customizable
software sound generators, such as oscillators and envelope generators. Additionally, the DSP adds
digital sound effects such as flanger, delay, or filters to the synthesized sounds. A simple sequencer is
available to store note patterns in memory implementing a looper. All of these features can be set and
modified through a graphical user interface (GUI), which updates the DSP in real time.
The analog portion of our synthesizer acts as a modular analog synthesizer, giving the user a
‘plug and play’ experience. A keyboard interface circuit monitors the output of each IR sensor and relays
the necessary information to the analog modules to trigger the proper sound events. A variety of analog
modules are available to the user, and include a voltage controlled oscillator (VCO), a low frequency
oscillator (LFO), an envelope generator (EG), and a voltage controlled amplifier (VCA). The user is able to
control each module through panel mounted switches and knobs. These modules can be interconnected
in different ways to create a variety of sound effects.
Finally, the analog and digital portions are both mixed together and output to headphones or a
line-out connection.
Technical Objectives
The block diagram of the synthesizer is shown in Figure 1.
Figure 1
The four main components of this project include analog hardware, digital hardware, software
sound generators/effects, and a power supply. The objectives of these respective sections are detailed
below.
Analog Hardware

Keyboard Interface
o
o
o

Voltage Controlled Oscillator
o
o
o
o

o
o
Generate multiple different waveforms (ramp, sawtooth, square, triangle, and sine) with
frequencies based on user input (a control knob)
Produces frequencies between 0.3 Hz and 30 Hz, roughly
Visually display rate of output through an LED
Envelope Generator
o
o

Generate multiple different waveforms (sine, triangle, ramp, square) with frequencies
based on a control voltage input
A 1V increase in control voltage will correspond to an increase in output frequency by
one octave (double the frequency)
Able to produce accurate output frequencies over at least 3 octaves
Can produce any frequency within the audio range (approximately 20 Hz - 20 kHz)
Low Frequency Oscillator
o

Monitor each of the 12 IR sensors to determine which keys are active and which keys
are not.
Generate a control voltage based on which key is pressed.
Generate a gate and trigger signal, which represent an active key and a key change,
respectively.
Generate an envelope waveform with four variable parameters (attack, decay, sustain,
release)
The rate or level of each parameter will be controllable through knobs or switches by
the user
Voltage Controlled Amplifier
o
o
Amplify or attenuate an input signal based on other input voltages, such as an envelope
waveform.
Generate an output signal within safe voltage levels specified by the IC used to mix the
analog and digital sounds.
Digital Hardware

DAC
o
o
o
o
o

DSP
o
o
o

Interface with a two channel stereo digital to analog converter (DAC)
Send samples to DAC in real-time at a sample rate of 44.1kHz
Use a 16 bit data format for high quality sound
Communicate using modern I2 S (audio data) and I2C (control) protocols
Drive headphones and line-out connections from integrated amplifiers
Use peripherals to interface with analog data from keyboard, send digital data to DAC,
and control data from user interface
Optimize usage of internal hardware for real-time sound synthesis
Realize I2 S protocol using serial hardware
Bluetooth Co-Processor (Reach Objective)
o
o
o
Utilize a simple microprocessor to implement bluetooth SDK/stack
Send control messages to DSP via UART
Process bluetooth data via Application Controller Interface (ACI) over SPI to
communicate with the GATT layer of the Bluetooth Low Energy (BLE) stack
Software Sound Generators/Effects
A graphical overview of the software block diagram is shown in Figure 2, a flowchart is shown in
Figure 3. The software is largely an interrupt driven system.
Figure 2
Figure 3

ADC Drivers
o
o

Envelope Generator
o

Interface onboard analog to digital converter (ADC) module to IR array
Sequence samples from all 12 IR keys at a reasonable sample rate
Use an efficient algorithm for scanning IR array in order to create an envelope for the
output sound based on the location of the user’s hand
Unit Generator (Digital Oscillator)
o
o
o
o
o
Create multiple frequency scalable waveforms that are generated in software
Should have a low memory footprint
Use numerically controlled oscillator (NCO) algorithm combined with a wavetable to
produce output waveforms
Support basic waveforms: sine, square, sawtooth, triangle
Operate at frequencies within audible range

Sound Effects (SFX)
o
o

Sequencer
o
o

Allow user to customize the SFX stack and operation parameters
Support simple effects such as: chorus, delay, reverb, flanger
Allow user to record a sequence of key presses and continually loop them back
Support new key press data being added to the currently looping data
UART Drivers for Control (Reach Objective)
o
o
Interface with BLE stack co-processor
Adjust audio processing parameters based on control data
Power Supply


Provide multiple voltage levels (±12V, 5V, 3.3V, and 1.8V) from a single battery
Provide low noise voltage rails due to sensitivity of audio circuits/applications
Technology Selection
Processor

TMS320F28335PGFA: Digital Signal Controller
o Clock Speed: 150 MHz
o On-chip Memory: 256KB Flash and 34KB SARAM
o 6-Channel DMA
o 6 32-bit Input Capture or Auxiliary PWM Outputs
o 12-bit ADC with 16 Channels at 12.5 MSPS
o 3 32-bit CPU Timers
o 2 Multichannel Buffered Serial Port (McBSP)/SPI
o 1 SPI Peripheral
o 3 SCI Peripherals
o 1 I2C Peripheral
o 88 General Purpose I/O’s (shared)
o 8 External Interrupts
o Dedicated floating point unit (FPU)
We chose this processor because of the FPU which would make fractional calculations fast and
efficient to satisfy our real time constraint. The processor also has a rich peripheral set including the
configurable McBSP which can be used for I2S data framing. TI’s hand optimized signal processing library
allows the processor to perform robust DSP algorithms in real time. The DMA peripheral allows the
processor to sample the onboard ADCs in rapid succession and put the results directly in memory
buffers, this allows the processor to focus on more critical audio processing tasks.
Audio Output

TLV320DAC3101: Low Power Stereo Audio DAC with Stereo Class-D Speaker Amplifier
o 95-dB DAC SNR
o 32-bit DAC Resolution
o
o
o
o
o
I2C Control Interface
I2S Digital Audio Interface
Stereo 1.29-W Class-D BTL 8Ω Speaker Driver
Supports 8 kHz to 192 kHz Sample Rates
Programmable PLL for Flexible Clock Generation
This DAC was selected because of its high level of integration and customizability. It satisfied our
needs of running 16 bit stereo at 44.1kHz and also supports I2C and I2S interfaces. It has built in Class D
speaker amplifiers and headphone drivers which gives a lot of functionality that common synths have. It
also contains a variety of customizable filters which are useful for producing certain audio effects.
User Interface

GP2Y0A41SK0F: IR Sensor
o 4cm to 30cm Range
o Optical filtering circuitry and physical filtering built in
We chose these IR sensors because they are widely used, supported, and very integrated. They
should be very easy to interface with our on chip ADC

SN74CBTLV16292: 12-Bit 1-Of-2 FET Multiplexer/Demultiplexer
This 12-bit bus multiplexer/demultiplexer allows the 12 IR sensors to control either the digital
synthesizer or the analog synthesizer based on a switch controlled by the user. This IC was chosen
mainly for its bus size, but it also boasts a small footprint and internal pull down resistors, reducing the
number of external components needed.

BlueFruit BLE (nRF8001): Bluetooth module (Reach Objective)
o Establishes BLE connection with iOS or Android Devices
o Has example SDK and code for apps available
The BlueFruit was chosen because of its rapid prototyping environment. Using it with an arduino
should be a quick and easy way to add bluetooth control to our project without taking time from the
focus on audio.
Analog Synthesizer Modules
A variety of operational amplifiers and other IC’s were used in the analog module designs. Table
1 displays each component used, along with a short description.
Component
Description
Slew Rate (V/µs)
Noise (nV/√Hz)
OPA164x
High Performance, Audio
20
5.1
LM13700
Current Controlled, Transconductance Amplifier
50
Not Given
TL07x/TL08x
General Purpose Amplifier
13
18
CD40106
Hex Schmitt Trigger
N/A
N/A
CD4066
CMOS Quad Bilateral Switch
N/A
N/A
CD4001
Quad 2-Input NOR Gate
N/A
N/A
Table 1
The TL07x and/or TL08x were chosen based on availability and cost. Both can be used for any
general purpose op-amp where noise is not a critical factor. In the cases where noise must be kept low,
the OPA164x will be used. It was designed for high performance audio applications, maintaining low
noise, and was chosen based on this feature. The LM13700 will be used when it is necessary to control
the output current of an amplifier externally. This chip was chosen due to its cost and for the fact that it
also includes output buffers on chip.
The CD40XXX IC’s were chosen due to their availability, low cost, and ability to perform over a
large voltage range (±12V). No other performance characteristics were necessary in these IC’s, so any
other IC with similar functionality that can handle the given voltage range could be used in place of
these.
Various transistors and diodes were used in the analog modules and are listed below. The
components chosen were all general purpose transistors/diodes and were mainly chosen based on
availability.
 SSM2212: Dual-Matched NPN Transistor
 2N3904: Small Signal NPN Transistor
 2N3906: Small Signal PNP Transistor
 J112: N-Channel JFET Transistor
 1N4148/1N914: High Speed Switching Diode
 1N5225B: 3V Zener Diode
 1N5242B: 12V Zener Diode
Panel-mounted potentiometers, switches, buttons, and audio jacks were chosen to mount to
the faceplates of each analog module. Finally, a multitude of through-hole resistors and capacitors were
used in each analog module design.
Power

7.4V 5000mAh LiPo Battery
This battery was chosen mainly based on availability and convenience. It has a large enough
capacity to power our system for multiple hours and comes with charging and protection circuitry.


LM1084-5: 5V 5A Low Dropout Positive Regulator
o Chosen for its regulated output voltage and large output current, which would be
necessary since the 5V line will drive all other power lines (±12V, 3.3V, and 1.8V) as well
as supply power to the IR sensors
TPS70351: Dual-Output Low Dropout Voltage Regulator
o This component was chosen because it was used in a dev board, and was proven to
work with the system we were using. This component provides the necessary 3.3V (1A
output current) and 1.8V (2A output current) to power our processor.



TPS65131: Positive and Negative Output DC-DC Converter
o This part was chosen because it offered both a dual output voltage of ±15V from 5V in a
single package. This component is rated for over 300mA of output current for either
output voltage which is enough to drive the analog synthesizer modules.
UA78M12: 12V Positive Voltage Regulator
o This component was chosen to regulate 15V down to 12V for the analog modules and
has a sufficient output current (500 mA) for our application.
UCC384-12: Low Dropout 0.5A Negative Linear Regulator
o This component was chosen to regulate -15V up to -12V for the analog modules and
offers a sufficient output current (500 mA) for our application.
Bill of Materials
A list of the components and materials used in the final product of this project are displayed in
Table 2 below.
Item
Cost
DSP
DAC
IR Sensors
12Bit Bus Mux/Demux
Bluefruit BLE (nRF8001)
OPA1642
LM13700
TL07x
CD40106
CD4001
CD4066
SSM2212
2N3904
2N3906
J112
1N4148
7.4V LiPo Battery
LM1084-5
TPS70351
TPS65131 EVM
UA78M12
UCC384-12
LM324
FT232RL
Epson 15MHz Oscillator
ATMEGA 328
Supplied by UF
$4.54
$98.42
$2.55
$19.95
$4.23
$7.96
Supplied by UF
$1.04
Supplied by UF
Supplied by UF
$7.10
Supplied by UF
Supplied by UF
$2.25
Supplied by UF
Previously Acquired
$3.02
$6.09
Supplied by TI
$1.48
$12.30
$1.20
$4.50
$1.71
$3.92
16MHz Crystal
6 SPST Switch Bank
8 Blue Surface Mount LED’s
1k SIP Resistor
Audio Connector
Resistor Pack Array
Surface Mount Caps/Resistors
Thru-Hole Resistors (Specific)
Thru-Hole Resistors (General)
Thru-Hole Caps
1N5225B
1N5242B
Trimmer Potentiometers
Panel Mounted Potentiometers
Metal Potentiometer Knob
Panel Mounted SP3T Switch
Panel Mounted SPST Switch
Panel Mounted Push Switch
Acrylic Sheet
Enclosure Material
4 Layer DSP PCB
Analog Module PCB’s
$0.81
$0.68
$2.32
$0.40
$1.26
$0.35
$10.00
$10.00
Supplied by UF
Supplied by UF
$0.12
$0.11
$14.00
$10.28
$13.30
$3.14
$3.31
$1.70
$2.66
Supplied by UF
$66.00
$103.00
Total Cost
$425.70
Table 2
Division of Labor
The division of labor is shown in Figure 4 below. This table lists each objective, the projected
start/end dates, and the person responsible for that objective. The objectives have been split in a way
that Sean oversees the digital portion and Troy oversees the analog portion. Although certain members
were responsible for overseeing certain tasks, we deliberated as a team on all aspects of the project.
Figure 4
Gantt Chart
Our projected timeline is shown in the Gantt chart of Figure 5. The orange blocks represent the
objectives overseen by Troy, the blue blocks represent those overseen by Sean, and the green blocks
represent those overseen by both. Our goal was to have all basic functions working by the end of
February. This left the month of March for stretch goals and system integration. The weeks before our
final demo were to be used for fine tuning and assembling our system.
Figure 5
TI Innovation Challenge Information
7 Deadly Synths
University of Florida
TI Innovation Challenge 2015 Project Report
Team Leader:
Team Members:
Sean Lyons [email protected]
TeamT Troy Bryant [email protected]
Team
Advising Professor:
Dr. Karl Gugel [email protected]
Video
Provide link to video that you’ve uploaded to www.ti.com/videos
We provided two videos, one is a short teaser video, the second is an in
depth technical review
Teaser Video:
https://youtu.be/RpbRVDXVeZw
Technical Overview:
https://youtu.be/-o38CmUGFgg
Pictures, and more documentation can be found at our website:
Please visit our website for in-depth explanations about our product!
More videos are linked here as well.
https://7deadlysynths.wordpress.com/
Texas Instruments
Mentor (if applicable):
N/A
Date:
5/20/2015
Qty.
List all TI analog IC
and TI processor part
number and URL
1) Explain where it was used in the project?
2) What specific features or performance made this
component well-suited to the design?
1x
TMS320F28335
1.
2.
1x
TPS70351
1.
2.
The c28x DSP was chosen to be the heart of the digital portion of the
synthesizer. It was responsible for reading the IR keyboard, generating
samples, handling serial data from a computer GUI, creating sound
effects, running a sequencer, and sending data back to the GUI
Our main requirement was handling stereo audio in the I2S format at
44.1kHz per channel. We also needed to handle fast floating point
operations (dedicated FPU was a must). Accelerations such as
hardware circular buffers also contributed to meeting our real time
requirement. A rich peripheral set such as the McBSP (for I2S data) and
the sequenced ADC (for sampling IR keyboard) was essential.
This integrated LDO and SVS was used to provide power to our c28x DSP. It
takes a 5V input and creates the supplies required to boot the DSP (3.3V,
1.8V)
We chose this part because it is marketed as a solution for TI’s DSP products,
it generates the split supplies needed for the digital core and the IO voltages
of the DSP. These supplies were then filtered to create an analog 3.3V and
1.8V rail. We also needed split supplies for our DAC IC and this LDO being to
provide up to 3A (both supplies combined) was a good fit for our design. It
also allowed for a system wide POR thanks to the integrated SVS.
1x
TLV320DAC3101
1.
2.
3x
LM324N
1.
2.
3x
LM324N
1.
2.
1x
SN74CBTLV16292
1.
2.
14x
TL07X
1.
2.
3x
LM13700
1.
2.
1x
OPA1642
1.
A DAC was needed to convert the samples generated by the DSP to
analog audio waveforms. We also used the integrated hardware signal
processing blocks for user controlled real time filtering of the digital
waveforms.
The main requirement for a DAC was handling the 44.1kHz/channel I2S
format stereo audio stream from the DSP. We decided on this IC
because of the integrated headphone, lineout, and speaker drivers,
which we thought would allow for a noise free, simple method
generating our output audio waveforms. Upon further investigating, we
were really sold on the integrated signal processing blocks as we
thought they could add some interesting features to our product (real
time adaptive filtering of signals)
These op amps were used in a comparator configuration to drive LEDs
that provided feedback to the user when a synth key was “pressed”,
they monitored the IR output voltage and compared it to a fixed voltage
to determine whether or not to light the LED when the IR beam was
tripped.
Though a dedicated comparator chip with a LED driver would have
been a more ideal solution, we chose these chips because this circuit
was a non-essential part of the project and we had the chips on hand
already. After testing we found that the LM324N worked perfectly for our
application, so we kept the design in place.
These op amps were used as input buffers/low pass filters to isolate the
IR sensor array from the DSP’s ADC inputs. The low pass filtering
removed the high frequency spikes that are characteristic of commercial
IR sensors. The unity gain buffering isolated the ADC from unsafe
voltages and provided a better impedance match.
We chose the 324N because they are versatile, cheap, and very
effective for our application. They were used in single supply mode,
running of the 3V3A rail on our processor board. Since each IR sensor
required an op-amp the quadruple package size also reduced board
size.
This bus mux was used to switch the analog output from the IR sensors
between the digital and analog portions of the project. A switch was
connected to the select signal.
We selected this bus mux because of the low resistance connection
between the ports, and because it offered a simple solution for
switching all 12 analog signals in one package. The internal pulldown
resistors set the outputs to a known state.
These op amps were used in each of the four analog synthesizer
modules and also in the keyboard interface. Many different op amp
configurations (summing amplifiers, inverting/non-inverting amplifiers,
integrators, voltage followers, and comparators with hysteresis) were
necessary for the signal manipulation needed in the oscillators,
amplifier, and envelope generator.
These amplifiers were chosen for our design because of their
affordability, availability, wide supply voltage range, and their low power
consumption. These amplifiers also offered low noise and a high slew
rate, which were necessary for audio applications.
This component was an integral part of the voltage controlled amplifier,
providing a way to manipulate the amplitude of one signal with a control
voltage. These were also used in the oscillator modules in order to
better calibrate the triangle to sine wave conversions.
These transconductance amplifiers were used mainly for their amplifier
bias current input and wide supply voltage range. The high SNR was
necessary for this audio application and the on-board high impedance
buffers minimized the number of external components needed.
This op amp, in conjunction with a dual-matched transistor, was used in
the voltage controlled oscillator module in order to convert a linear
2.
1x
LM1084-5
1.
2.
2x
TPS65131
1.
2.
3.
2x
UA78M12
1.
2.
2x
UCC384-12
1.
2.
voltage change to a logarithmic current change. This allows the output
frequency to be increased by 1 octave for each volt of input voltage.
This op amp was specifically made with audio applications in mind, and
was chosen for its high performance. It boasts a high slew rate, with low
noise and very low distortion. This component also operates along a
wide supply voltage range, which was necessary for our analog
synthesizer modules.
This LDO was used to regulate a 7.4V source down to 5V in order to
provide multiple other power IC’s with the necessary input voltage.
This component was chosen for its fixed 5V output and its 5A output
current. The large output current was necessary to provide power to our
entire project while leaving enough headroom for any future additions to
the synthesizer. It also has a maximum dropout of 1.5V at 5A of load
current, which was sufficient for our application.
This dual output DC-DC switching converter was used to provide ±15V
sources from a single +5V source.
The TPS65131 was ideal for our application because it could produce a
dual voltages large enough to power the analog modules from a single
5V source, which was already needed for the IR sensors and the LDO
to power the DSP.
We were not able to achieve the ideal output supply current listed in the
TPS65131 datasheet, so we used two components to split the current
load of the analog synthesizer modules and the keyboard interface.
These LDO’s convert the +15V sources from each TPS65131 to +12V
sources in order to directly power the analog synthesizer modules and
the keyboard interface.
This component was chosen for its fixed output voltage, reducing the
number of external parts. Since the analog synthesizer would draw no
more than 200mA from the positive power supply, the 500mA output
current limit of this component was sufficient for our application.
These LDO’s convert the -15V sources from each TPS65131 to -12V
sources in order to directly power the analog synthesizer modules and
the keyboard interface.
This component was chosen for its fixed output voltage, reducing the
number of external parts. Since the analog synthesizer would draw no
more than 200mA from the negative power supply, the 500mA output
current limit of this component was sufficient for our application.
Submit your TI Innovation Challenge project to http://tiic-na.hartehanks.com. Your team is
encouraged to post your project as early as possible- Your submission will be kept offline until the
contest has officially closed!
Instructions:
 Submit your project and include the following documents
o Your full class report, which much include this TI project report.
o Upload a video of demonstrating your project to www.ti.com/vidoes (must log
into my.TI) and provide the link to that video in this project report. We’d love to
see your team engaging with TI products!
o Link to supplemental photos
Our project is to create an analog and digital synthesizer. Unlike a traditional synthesizer, it is not
controlled by a keyboard, but is controlled an IR sensor array. The IR array detected the position of
the player’s hand within the 2D space and synthesize a note based on the position of the hand. The
analog synthesizer is made with discrete analog components. The digital synthesizer is made with
embedded software running on a TI DSP that is controlled through a GUI. Our motivation behind
creating this product was to allow musicians who do not have fine motor control to create music. The
result was a product that created a new way of interacting with music.
Appendix
Schematics
Motherboard
Motherboard USB/UART
Motherboard DAC
Motherboard Bypass Capacitors and LDO
Motherboard Arduino
Motherboard Input Buffers Pg. 1
Motherboard Input Buffers Pg. 2
Motherboard DSP
Power
Power Board
Keyboard Interface
IR Comparators
CV, Gate, and Trigger Synthesis
Voltage Controlled Oscillator
Raw Saw Wave Synthesis
Output Waveform Synthesis
Low Frequency Oscillator
Low Frequency Waveform Synthesis
A.D.S.R. Envelope Generator
A.D.S.R. Waveform Synthesis
Voltage Controlled Amplifier
Voltage Controlled Amplifier
Code
The following github repositories contain all code written for this project.
Embedded DSP:
https://github.com/seanmlyons22/EEL4924C-Senior-Design
GUI:
https://github.com/seanmlyons22/EEL4924C-Senior_GUI