out-of-key

bitter bleak grim hard rigid severe sharp strident

coarse

acrid asperous astringent cacophonous caterwauling clashing cracked craggy creaking croaking disagreeing discordant dissonant disturbing earsplitting flat glaring grating guttural hoarse incompatible jagged jangling jarring noisy not smooth off-key out-of-tune rasping raucous rugged rusty screeching sour stridulous tuneless uneven unlevel unmelodious unmusical unrelenting

bland bright calm cheerful easy facile flexible kind low mild moderate nice pleasant pliable pliant soft sunny yielding

courteous gentle peaceful pleasing polite smooth

cracked discordant hoarse raspy raucous

acrid asperous astringent bitter bleak cacophonous caterwauling clashing coarse craggy creaking croaking disagreeing dissonant disturbing dry earsplitting flat glaring grating grim guttural hard incompatible jagged jangling jarring noisy not smooth off-key out-of-tune rasping rigid rough rugged rusty screeching severe sharp sour squawky strident stridulous tuneless uneven unlevel unmelodious unmusical unrelenting

soft

cacophonous caterwauling coarse cracked creaking croaking discordant dissonant earsplitting flat grating grim guttural hard hoarse jagged jangling jarring noisy off-key out-of-tune rasping raspy raucous rough rugged rusty scratchy screeching severe sharp sour strident stridulous tuneless unmelodious unmusical