Contralto as a noun is the lowest female voice or voice part, higher than tenor and lower than soprano. the terms contralto and alto refer to a similar musical pitch, but among singers, the term contralto is reserved for female singers; the equivalent male form is counter-tenor. originally the contratenor altus was a high countermelody sung against the tenor or main melody. while Low-pitched as an adjective is of a sound, having a comparatively low pitch.
Part of speech: noun
Definition: the lowest female voice or voice part, higher than tenor and lower than soprano. The terms contralto and alto refer to a similar musical pitch, but among singers, the term contralto is reserved for female singers; the equivalent male form is counter-tenor. Originally the contratenor altus was a high countermelody sung against the tenor or main melody.
Part of speech: adjective
Definition: Of a sound, having a comparatively low pitch.
We hope you now know whether to use Contralto or Low-pitched in your sentence.