Say hello to Buddy—the friendly, conversational copilot built on top of PiEEG-Agent, and it lives entirely in your browser. No Python environment, no dependency management, nothing to install. Open buddy.pieeg.com, connect your headset, and start talking to your brain in real time.
Why Browser-Based?
Because the fastest lab is the one that's already open. Buddy runs online as a web app, so getting started is as simple as opening a tab:
- Zero install — no Python, no Node.js, no drivers to configure
- Works everywhere — any modern browser on your laptop or desktop
- Always up to date — you're on the latest version every time you load it
- Your data stays local — signal processing runs in the browser, on your machine
Working with live EEG usually means juggling signal-processing scripts, visualization tools, and statistics notebooks. Buddy collapses all of that into a single conversation in a browser tab. You ask a question about your neural state; Buddy handles the math and hands back an answer you can act on.
No black boxes, either—Buddy shows you why it reached a conclusion, from channel importance to effect sizes.
What You Can Ask
Buddy speaks the language of your experiment. A few things it does out of the box:
Check your signal quality
You: how's my signal? Buddy: All channels read "good", quality 0.98 — trustworthy signal.
Read your brain state
You: am I focused or relaxed? Buddy: Relaxed. Alpha is dominant (0.87) and focus is low (0.31).
Train a custom pattern
You: train a pattern called "meditation" Buddy: Starting pattern training. I'll guide you through recording a baseline, then the active state — say "yes" when you're ready to record.
Buddy walks you through each step, captures labeled windows, and reports honest, cross-validated results: balanced accuracy with leave-one-rep-out CV, the top neural cue, and per-channel importance.
Go deep on the spectrum
You: analyze my alpha rhythm Buddy: Individual alpha peak (IAF): 10.2 Hz · Alpha power: 0.73 (dominant) · 1/f slope: -1.1 · Spectral entropy: 0.68 · Frontal alpha asymmetry: -0.05.
Map your connectivity
You: show connectivity in the alpha band Buddy: Mean correlation 0.34. Strongest pair C3↔C4 (r=0.72) — motor cortex synchrony. Most connected: C3.
Built on Honest Science
Buddy doesn't hand-wave. Every capability is grounded in research-grade methods:
- Real-time brain state — focus, relaxation, and engagement as session-relative indices
- Pattern recognition — L2 + group-lasso classifiers validated with leave-one-rep-out cross-validation
- Spectral analysis — IAF detection, 1/f slope, theta/beta ratio, spectral entropy
- Connectivity — cross-channel amplitude coupling in any frequency band
- Session recording — labeled windows compared with effect sizes (Cohen's d)
- Artifact detection — eye blinks, jaw clenches, and motion flagged automatically
- Jupyter notebooks — auto-generated so your analysis is reproducible
Connects Right From the Browser
Thanks to browser-native hardware support, Buddy talks to your PiEEG headset directly from the tab—no bridge app or middleware required. It works across the PiEEG ecosystem, from a Raspberry Pi prototype to a professional 32-channel rig. Just plug in, grant access, and Buddy starts reading your live stream.
Meet Buddy Today
Whether you're building neurofeedback tools, running cognitive research, or just curious what your brain does during deep work — open a tab and start a conversation with Buddy.