The Monochord
{{_element = ui.model.selectedElement;''}} {{_set = ui.model.selectedSet;''}}

Scale designer

{{setSelected = _set && ===;''}}
{{$index}} {{elementSelected = _element && > 0 && (set.strings.indexOf(_element) !== -1 || set.cents.indexOf(_element) !== -1);''}} {{elementSelectedIsString = set.strings.indexOf(_element) !== -1;''}}
  • {{mctrl.ui.model.isStringSet(set) ? 'JI' : '¢'}}

Scala import

Preset: Divide the ratio ( : ) into equal parts

Scale successfully imported!

Parse error at line {{e.atLine}}!
expected: {{e.expected}}
got: {{}}



Sequencer -- Under construction!

{{ui.sequencer.playing}} {{ui.sequencer.index}}

Ear training

The Monochord

A microtonal sandbox project developed and maintained by Lajos Mészáros (m_lajos[at]hotmail[dot]com)

If you are new to this app, then you might want to check out the interactive tutorial by clicking on the "view tutorial" link in the bottom right hand corner


Scala - format of the de-facto microtonal tuning software, created by Manuel Op de Coul,

Switch language

Translation is work in progress

[ English ] [ Magyar ]

Other tools

Redesigned version of Joe Monzo's interval list

Click here to see, where the project started back in 2015


MIDI settings

INPUT ports of attached MIDI devices

device name channels

OUTPUT ports of attached MIDI devices

device name channels
midi out demo


white mode - remaps the keyboard so it doesn't take note of black keys


Web Audio API is not supported in this browser!

To see, which browsers support Web Audio API, please visit