Difference between Unmusical and Monotone

UNMUSICAL vs MONOTONE: NOUN

A single unvaried tone of speech or a sound
The utterance of successive syllables, words, or sentences, on one unvaried key or line of pitch.
A single unvaried tone or sound.
Something spoken or written in one tone or strain.
Recitation of words in such a tone, especially in a church service, sometimes with harmonic accompaniment and with occasional inflections or melodic variations; intoning; chanting.
An unchanging intonation
A single tone repeated with different words or different rhythms (especially in rendering liturgical texts)
A single tone, without harmony or variation in pitch.
In music:
A succession of sounds or words uttered in a single tone of voice.
A chant in a single tone.
Sameness or dull repetition in sound, style, manner, or color.
Monotony or sameness of style in writing or speaking.
In rhetoric, a sameness of tone; the utterance of successive syllables at one unvaried pitch, with little or no inflection or cadence.
A single or uniform tint or color.

Sounded or spoken in a tone unvarying in pitch
Of a sequence or function; consistently increasing and never decreasing or consistently decreasing and never increasing in value
Characterized by or uttered in a monotone.
Of or having a single color.
Designating sequences, the successive members of which either consistently increase or decrease but do not oscillate in relative value. Each member of a monotone increasing sequence is greater than or equal to the preceding member; each member of a monotone decreasing sequence is less than or equal to the preceding member.
Property of a function to be either always decreasing or always increasing
Having a single unvaried pitch

Clangorous, Melodious, Tuneful, Discordant, Cacophonic, Toneless, Atonal, Tuneless, Unmelodious, Monotone, Monotonic, Monotonous, Nonmusical, Dissonant, Unmelodic

Bland, Mumble, Drawl, Staccato, Decreasing, Chant, Unmelodious, Increasing monotonic, Decreasing monotonic, Drone, Unmusical, Monotonic, Monotonous, Unmelodic, Droning

Clangorous, Melodious, Tuneful, Discordant, Cacophonic, Toneless, Atonal, Tuneless, Unmelodious, Monotone, Monotonic, Monotonous, Nonmusical, Dissonant, Unmelodic

Bland, Mumble, Drawl, Staccato, Decreasing, Chant, Unmelodious, Increasing monotonic, Decreasing monotonic, Drone, Unmusical, Monotonic, Monotonous, Unmelodic, Droning

He has an unmusical voice, and a swaggering walk, and generally wears his hat set upon one side of his head.
I've found that promotion can be quite unmusical and sometimes you forget that you are a musician.
Our completely unmusical daughter, whose stubborn efforts to learn to play the violin amused, touched and infuriated us.
The quaint and wild beauty of this tune will be appreciated by the most unmusical reader.
Miss Taylor no longer danced to the unmusical accompaniment of THE COLUMBINE QUESTION.
Fewer motions are more unmusical than a string bass player releasing all fingers at the same time.
They are the most unmusical in the packet.
The song is so unmusical, but I sit transfixed.
Resplendent Quetzals have other unmusical calls as well.