Live Stem Splitter Kit with ESP32 + LED
Build a Live Stem Splitter with ESP32 – Separate Vocals & Instrumentals in Real-Time
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Transform any audio source into separate vocal and instrumental streams in real-time. Whether you're a performing musician isolating backing tracks, a DJ creating live remixes, or an audio engineer prototyping smart audio devices, this kit puts a Wiener filter-based DSP system at your fingertips. Using the powerful ESP32 and a precision MCP4728 DAC, you'll build a portable splitter that processes audio on the fly—no computer required.
What You'll Build
You'll assemble a compact, standalone unit that takes in live audio through a high-sensitivity MEMS microphone, applies a Wiener filter algorithm on the ESP32 to separate vocal and instrumental components, and outputs both stems simultaneously to two speakers. The on-board OLED displays the separation state, and the robust enclosure makes it gig-ready. This is a fully functional audio tool, not a toy.
What You'll Learn
- Implementing real-time Wiener filtering on an embedded MCU
- Interfacing I2S microphones and I2C DACs with ESP32
- Audio buffer management and DMA transfer for low-latency processing
- Designing robust enclosure and power management for portable audio gear
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| MAX9814 Mic | 1 |
| MCP4728 DAC | 1 |
| PAM8403 Amp | 1 |
| 3W 8Ω Speaker | 2 |
| 0.96in OLED | 1 |
| 100nF Caps | 15 |
| PCB Prototype Board | 3 |
| 5V 2A PSU | 1 |
| Enclosure Box | 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
Ideal for advanced hobbyists, audio engineering students (B.Tech ECE/EEE, M.Tech DSP), professional musicians exploring live processing, and participants in Smart India Hackathon working on real-time audio solutions. Also suitable for professors setting up DSP lab experiments at IITs, NITs, or VIT.
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?
Your AI companion on the QR code offers real-time troubleshooting; you can also reach us on WhatsApp for direct support from our engineers.
Can this kit handle line-level inputs for studio use?
Yes, the MAX9814 mic module can be bypassed with a simple hardware mod to accept line-level signals. The companion AI includes instructions for this modification.
How effective is the Wiener filter on modern pop tracks?
The algorithm achieves clean separation on most mixed-down stereo tracks with centered vocals. For heavily processed audio, the OLED will show the separation confidence, and you can tweak filter parameters via the ESP32's web interface.
Is the enclosure strong enough for touring?
The included ABS enclosure is impact-resistant and sized for pedalboard mounting. You can reinforce it with optional rubber feet, and the soldered joints are strain-relieved inside.
ESP32 applies Wiener filter to separate vocal and instrumental stems from an audio mix via MCP4728.
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.
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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