# Welcome to the Highcharts Maps JS (highmaps) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

Feel free to search this API through the search bar or the navigation tree in the sidebar.

# plotOptions.geoheatmap.sonification.defaultInstrumentOptions.mapping.highpass

Mapping options for the highpass filter.

A highpass filter lets high frequencies through, but stops low frequencies, making the sound thinner.