low-toned vs soft

low-toned and soft both are adjectives.

Word	Noun	Adjective	Verb	Adverb
low-toned	No	Yes	No	No
soft	No	Yes	No	Yes

low-toned (adjective)	soft (adjective)
very low in volume	produced with vibration of the vocal cords
	yielding readily to pressure or weight
	compassionate and kind; conciliatory
	(of speech sounds); produced with the back of the tongue raised toward the hard palate; characterized by a hissing or hushing sound (as `s' and `sh')
	(of sound) relatively low in volume
	(of light) transmitted from a broad light source or reflected
	not protected against attack (especially by nuclear weapons)
	(used chiefly as a direction or description in music) soft; in a quiet, subdued tone
	mild and pleasant
	willing to negotiate and compromise
	not brilliant or glaring
	not burdensome or demanding; borne or done easily and without hardship
	(of a commodity or market or currency) falling or likely to fall in value
	having little impact
	soft and mild; not harsh or stern or severe
	tolerant or lenient
	using evidence not readily amenable to experimental verification or refutation
	easily hurt
	out of condition; not strong or robust; incapable of exertion or endurance

low-toned (adverb)	soft (adverb)
	in a relaxed manner; or without hardship