Thomastik-Infeld Dominant Viola Strings Thomastik-Infeld Dominant Viola Strings are widely regarded as “the reference standard.” Made with a highly flexible, multi-strand synthetic core, Dominants provide the tonal warmth and feel of a gut string while being impervious to changes in humidity. The sound is soft and clear with a stable intonation with a richness in overtones. Dominants are some of the world’s most popular strings.