Pop art eliminates overtones and undertones that would otherwise be associated with representations. A single harmonic overtone is quieter than a normal note, which contains many overtones. Musical intervals are complementary values of the harmonic overtones series. They are then called overtones instead of harmonics. These artists explore the macabre intermingled with sexual overtones. These sinusoids are called harmonics, overtones, or generally, partials. Harmonics are also called "overtones" or "partials". Adding to some of the religious overtones are choral vocals in the background. The other pitches are "harmonics", or "overtones". It took on all these sort of mystical overtones. The album garnered controversy for its sexual and religious overtones. Attempts to quell communal tensions through irresponsible reporting containing religious overtones have been alleged. The stories are largely police procedurals, featuring crimes that have heavy political or societal overtones. Walther was highly literate and intelligent, wrote several books with deep philosophical overtones. Sayre's early analysis was often ignored because of perceived feminist overtones in her book.