The phrase "sympathetic voice" is correct and can be used in written English.
For example, "My mother always used a sympathetic voice when I was feeling down to help me feel better."
He was slight and dark, with a musical, sympathetic voice and a natural air of reserve.
Since then, OAN has become a reliably sympathetic voice of the administration's goals and actions.
"The community is thrilled to have the state with us as a sympathetic voice in government".
"Come on, people," Mr. Jennings told the residents in a weary yet sympathetic voice.
And they've got no organised political voice, no organised black voice and no sympathetic voice on the left".
Cathie Ryan used to add her richly sympathetic voice to the Irish traditional songs of Cherish the Ladies.
"You depend on Oracle, Microsoft, I.B.M. and hundreds of other software packages," intoned the sympathetic voice-over announcer as the boxes fell.
More sympathetic voices might use another word: surprising.
Less sympathetic voices portray Hillary Clinton as having sabotaged it through her own crusading intransigence.
But her book, with its dueling narrators, had two vicious but sympathetic voices.
Suggesting the turnaround could begin with Sunday's game at Ibrox, he added: "There might be a few sympathetic voices in the ground, which would be nice.
