An online harmonium that sounds like one
Most online instruments are a synthesiser with a picture on top. This one plays recordings of a real harmonium, so the attack, the tone and the decay are the instrument's own. The harmonium is an organ without pipes: the reeds give it a warm, slightly nasal tone.
A short history of the harmonium
Alexandre Debain patented the harmonium in Paris in 1840 as an affordable organ for homes, chapels and schools. Brought to India in the 19th century, the hand-pumped harmonium became central to Indian devotional and classical music.
From the keyboard to the real instrument
A real harmonium is written in treble and bass clef. The keyboard here plays the sounding notes, so a melody you find by ear is the melody you hear. To go further, the free sheet music and chord pages work with any instrument you can read music on.