- half step
- hand-organ
- harmonious
- harmonise
- harmony
- harpsichord
- hexachord
- hoboy
- homophony
- horner
- homophonic
- horn
- hornpipe
- hot
- idyl
- humoresque
- imitation
- idyll
- idyllic
- idyllize
- impromptu
- improvisation
- improvisator
- inconsonance
- inconsonant
- inflectional
- inflexion
- inflexionless
- inflection
- inharmonic
- inharmonious
- inharmoniousness
- inflect
- inflectionless
- inflexional
- interlude
- instrumental
- intermezzi
- intermezzo
- interval
- intervallic
- intonation
- intonational
- introduction
- jarring
- jazz
- jazzy
- kettle-drummer
- keyed
- key
- kettle-drum
- keynote
- lady-killer
- largo
- leader
- larghetto
- leit-motif
- leit-motiv
- lento
- ligature
- lip
- lutanist
- lute
- lutist
- maestoso
- madrigal
- major
- mandolin
- mandoline
- measure
- mediant
- mensurable
- mezzo
- mi
- mezzo-soprano
- minim
- minor
- metre
- modal
- mode
- monochord
- mood
- motif
- muffler
- mordent
- movement
- mute
- natural
- nocturne
- note
- novelette
- octachordal
- octachord
- octet
- octette
- off-beat
- olla podrida
- one-step
- open
- obbligato