432 Hz Converter

This tool provides a numeric conversion from any input frequency to 432 Hz tuning. It targets musicians, audio engineers, and educators seeking a quick reference for alternate tunings.
Conceptually, it uses a fixed ratio of 432/440 to shift pitches. For note-based inputs, it first converts the note to Hz using standard equal temperament, then applies the ratio. Example: 440 Hz becomes 432 Hz; 880 Hz becomes 864 Hz.
Core features include single-frequency and batch support, output of converted Hz and the ratio, and handling of errors such as non-positive inputs. The tool does not edit audio but provides results suitable for downstream resampling, mastering notes, or teaching tuning concepts.
This tool supports international use with Hz as the unit; it assumes standard A4=440 Hz and clarifies that 432 Hz tuning is a reference, not a universally mandated standard.