Tools for analyzing the vibrational characteristics of violins
This is a modular browser-based toolkit for measuring Violin response. Everything runs locally in your browser — no uploads, no server. You need to use Chrome or Edge to access the folder picker and local file saving features.
🔍 Tools — v1.1.7 (stable)
Load, compare, and interpret multiple FRF files. Overlaid plots with smoothing, normalization, band and group averaging, coherence overlays, and per-dataset convolution playback. Print a labeled plot or ask Claude a question, right from the toolbar.
Tool · PyScriptLoad an FRF CSV or TRF and convolve it with any WAV file. Full complex frequency-domain convolution with min-phase or zero-phase reconstruction. Play and save the result.
Tool · PyScriptImpact-hammer FRF acquisition with auto-accept, calibration factors, multi-position templates, an on-screen Agenda checklist, and session notes with camera capture. Settings and templates saved to your Data Folder.
Tool · PyScriptStand-alone real-time hammer/mic monitor and live FRF estimate — the same LiveView as Acquire's "LiveView" button, in its own tab so it can run on a second monitor. Also reachable from inside Acquire.
Tool · PyScript🧬 Beta — v1.1.8 (testing)
Load, compare, and interpret multiple FRF files. Overlaid plots with smoothing, normalization, band and group averaging, coherence overlays, and per-dataset convolution playback. Print a labeled plot or ask Claude a question, right from the toolbar.
BetaImpact-hammer FRF acquisition with auto-accept, calibration factors, multi-position templates, an on-screen Agenda checklist, and session notes with camera capture. Settings and templates saved to your Data Folder.
BetaVisualisation and animation of mode shapes from an Acquire modal dataset. Data acquisition has moved to Acquire; Modal Analysis now focuses on loading, inspecting, and animating completed surveys.
BetaDesign and calibrate node layouts for projector-assisted hammer testing. Drag nodes to position, adjust the projection transform to fit your violin, and save stencils that automatically set positions in Acquire.
BetaNyquist circle fitting with residual compensation for accelerometer-based modal FRF data. Pin down each mode's natural frequency and damping, then jump straight to that frequency in Modal Analysis.
BetaLive single-channel microphone scope: raw waveform, an averaged magnitude spectrum (block average of the last N ~0.3 s snippets), and an on-demand scrolling spectrogram. Pick channel 1 or 2, pause anytime to zoom in on a Plotly chart.
BetaArchitecture reference for every tool — Mermaid flowcharts and state diagrams of how each tool's code actually works, with real function names. One page linking to a diagram per tool.
Beta📚 References
How to use Explore, Convolve, and Acquire. Quick-start guide, controls reference, and links to the full technical PDF.
GuideLog of fixes and features, per version.
LogBrowse the full source code on GitHub.
GitHub🧪 Experimental
Browse your Data Folder, select FRF / AvC / AvR files, and download
a .mat file ready to open in MATLAB. Complex FRF data is
preserved for AvC files.
Browse your Data Folder for .wav files. View hammer and
microphone time-domain signals, trigger markers, and the computed FRF
for any recorded capture.
Documentation for experimental tools: Export to MATLAB and WAV Viewer.
ExperimentalThree options: web UI via local server with browser caching (once online, then offline forever); fully air-gapped web UI via a one-time asset download script; or native desktop Python tools with no browser at all.
ExperimentalBuild a custom ObieApp tool using Claude Code. A starter prompt gives Claude the project rules, Python modules, and conventions needed to write a complete new tool.
ExperimentalAn independent, browser-based data acquisition & measurement analysis app by Tore Butlin — a different take on much of what ObieWebApp does. Not part of this repo; opens on its own site.
External