VOICEPLOT: VOICE-TO HANDWRITING USING CNC PLOTTER

VoicePlot AI demonstrates that it is now practical to build a voice-to-handwriting system using entirely open-source components running on commodity hardware, with no cloud dependency and an installation that fits in a single batch script. The pipeline from microphone to pen-on-pa-per works reliably for English speech in controlled acous-tic conditions, and the physical output is consistently readable. The main technical contributions are: the description of the end-to-end pipeline integration across four complex subsystems; the identification and software fix of the cus-tom plotter servo cold-start bug; and the implementation of a custom single-stroke font for direct SVG path gener-ation. The servo fix a warmup path plus an increased pen_delay_down value is likely to be relevant to anyone using the AxiDraw API with SG90-based plotter hard-ware. Future work will focus on three areas: Voice Activity De-tection for natural recording without a fixed time win-dow; Devanagari script support for Hindi and Marathi output; and emotion-aware font style selection, where a sentiment analysis layer chooses between different em-bedded fonts based on the detected tone of speech.

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