8 guides published so far — more are added regularly.
A step-by-step walkthrough of the real audio pipeline behind this tool: the highpass filter, envelope follower, adaptive-threshold onset detection, and the rate/beat-error math — exactly as implemented, not simplified.
Beat rate (bph) explained, how to find the correct value for your specific watch movement, and why selecting the wrong one gives a nonsense rate reading in any timegrapher, including this one.
Realistic rate (seconds/day) expectations for COSC chronometers, typical modern in-house movements, and vintage or unserviced watches — and how they map to this tool's Good / Noticeable / Large deviation flags.
Beat error explained: the mechanical cause (hairspring centering), what a healthy range looks like, and how this tool's Excellent/Acceptable/High flags map to when it's worth seeing a watchmaker.
An honest explanation of why a phone or laptop microphone can't produce a calibrated angular-amplitude reading like a professional timegrapher, and exactly what the 'relative amplitude' number here actually means.
Practical, specific steps for getting a reliable rate and beat-error reading from this tool: room noise, mic distance, handling, capture length, and multi-position testing.
Two different underlying causes can trigger this message. Here's how to tell which one you're hitting and the specific fix for each, based on exactly how the detection code decides to show it.
Real mechanical watches genuinely run at slightly different rates in different positions. How to test multiple positions with this tool and what the spread between them actually tells you.