Felo

Musical Notes to Stylophone Converter Online

Turn piano-style note names into Stylophone key numbers, or convert key numbers back into notes. The converter applies the documented 19-note map exactly, flags notes outside the A2–E4 range instead of dropping them, and accepts flats and lowercase input. Try it online.

What is Musical Notes to Stylophone Converter Online?

Musical Notes to Stylophone Converter Online is a text tool that turns written musical note names into the key numbers you press on a Stylophone, and turns those key numbers back into note names. If you have a melody written as C4 D4 E4 or a lead sheet that says A3 B3 C4, you paste it in and get the matching Stylophone numbers out. The converter uses the documented 19-note map from A2 up to E4, where a number ending in .5 is an accidental played on a top-row key.

Key Features

Exact 19-note mapping. A2 becomes 1, A#2 becomes 1.5, B2 becomes 2, and so on up to E4 becoming 12. The full map is applied literally, so the same input always gives the same output.
Both directions. Send note names and get Stylophone numbers, or send Stylophone numbers and get note names with octaves.
Flats and lowercase accepted. Bb3 is read as A#3, and a2 or c#3 are understood the same as A2 and C#3.
Honest out-of-range reporting. Notes below A2 or above E4 are listed separately instead of being silently deleted, so you know exactly which part of your melody needs transposing.
Order and layout preserved. Your notes stay in the order you wrote them, and line breaks are kept so a verse stays a verse.

How to Use

Paste your note names into the chat, for example C4 D4 E4 F4 G4 A3 B3 C4. You can separate them with spaces, commas or line breaks.
Read the Stylophone numbers in the response. Each number is a key; any number ending in .5 is an accidental on the top row.
To go the other way, paste Stylophone numbers such as 10 11 12 1 2 and ask for the note names.

Example Use Cases

Converting a simple melody to Stylophone notes. You have the first line of a tune written as C4 C4 G4 G4 A3 A3 G4 and want the Stylophone key numbers to play it.
Checking a Stylophone tab against sheet music. You found a Stylophone number sequence online and want to know which notes it represents before you play it.
Handling accidentals in a song. A melody with sharps like F#3 G#3 A#3 needs the .5 top-row keys, and the converter marks them clearly.

Tips for Best Results

Write each note with its octave number (C4, not just C) so the converter can match it exactly.
If a note falls outside A2–E4, transpose the whole melody by an octave and convert again; the response will tell you which notes were out of range.

FAQ

What input format does it accept?
Note names with an optional octave, separated by spaces, commas or newlines. Sharps use #, flats use b, and lowercase letters are fine. Stylophone numbers can be whole numbers or .5 values.

How accurate is the conversion?
The mapping is a fixed list of 19 notes, so results are exact for anything inside A2–E4. Notes outside that range are reported rather than guessed, and the tool does not claim to handle notes it has no mapping for.

How is this different from some free text tools?
Some free text tools apply a substitution list without telling you what happened to unmatched input. This converter states the full supported range, converts flats to their sharp equivalents, and lists any notes it could not map.

Does it play the notes?
No. It produces text key numbers only; you play them on your Stylophone.