It would do well for all of us to remember that we can not have perfect understanding of any of these things and take a more pleasant tone toward one another when we disagree. (redeeminggod.com)
The new algorithm produces more pleasant tones and can even provide color information. (sciencemag.org)
Writing a reference letter to recommend a bartender for a new job requires an invariably pleasant tone. (coverlettersandresume.com)