Formant Vowel Synthesiser Kit with Arduino Due + LED
Build a Real-Time Formant Vowel Synthesiser with Arduino Due – Master Digital Voice Synthesis
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Synthesise human-like vowel sounds from scratch using the source-filter model of speech. Two resonant bandpass filters — implemented on the MCP4728 quad DAC and driven by the Arduino Due’s 84 MHz Cortex‑M3 — shape formants F1 and F2 to produce everything from a deep ‘ah’ to a bright ‘ee’. This is not a pre‑assembled module; you design the signal chain, tune the filter coefficients, and build a fully enclosed voice synthesiser that responds to real‑time control.
What You'll Build
A self‑contained parametric voice synthesiser in a dedicated enclosure. Rotary encoders let you sweep F1 and F2 formant frequencies while an OLED displays live values. The filtered audio drives a 3W speaker through a PAM8403 amplifier, producing clear vowel tones. By the end, you’ll own a research‑grade tool for linguistics experiments, audio DSP exploration, or a standout engineering capstone project.
What You'll Learn
- Digital resonant filter design and real‑time implementation on a 32‑bit microcontroller
- Precision analog output via I2C‑controlled quad DAC (MCP4728) for smooth formant shaping
- Interrupt‑driven rotary encoder handling for low‑latency parameter updates
- Physics of voice synthesis — how formant frequencies and bandwidths create perceived vowel identity
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Due | 1 |
| MCP4728 Quad DAC | 1 |
| PAM8403 Amp | 1 |
| 3W 8Ω Speaker | 1 |
| Rotary Encoder | 2 |
| 0.96in OLED | 1 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 15 |
| PCB Prototype Board | 2 |
| Enclosure Box | 1 |
| 9V 1A PSU | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
B.Tech ECE and EEE students diving into real‑time DSP, linguistics or phonetics researchers prototyping source‑filter models, and participants in Smart India Hackathon who need a tangible voice‑interaction module. The advanced architecture makes it a strong choice for capstone projects at IITs, NITs, VIT, and BITS Pilani.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
The AI companion on the QR code walks you through each step visually; if you need human help, just send a photo via WhatsApp and our team will respond within hours.
Can I modify the code to synthesise consonants or diphthongs?
Absolutely. The firmware structure separates excitation source and filter stages, so you can extend the filter array or modulate parameters over time for consonant-vowel transitions.
Is an oscilloscope required for testing?
Not required — the OLED displays formant frequencies and you can hear changes through the speaker. An oscilloscope is useful if you want to inspect the DAC output waveform quality, but the kit works standalone.
Does this kit model male and female vowel spaces?
Yes, by adjusting the frequency ranges of F1 and F2 you can explore typical male (lower formants) and female (higher formants) vowel spaces, directly mapping the source-filter theory used in phonetics research.
Two resonant bandpass filters on MCP4728 DAC outputs model vowel formants F1 and F2 for voice synthesis.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items