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

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

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# series.contour.sonification.defaultInstrumentOptions.roundToMusicalNotes

Round pitch mapping to musical notes.

If `false`, will play the exact mapped note, even if it is out of tune compared to the musical notes as defined by 440Hz standard tuning.