SLS (Speech Level Singing)
Quick Definition
A vocal method developed by Seth Riggs that emphasizes maintaining a stable, speech-like larynx position throughout the entire singing range.
Factual Definition
Speech Level Singing is a vocal pedagogy system developed by Seth Riggs based on the principle of maintaining a relatively neutral, speech-like laryngeal position while singing through all registers, aiming to eliminate excess tension and produce seamless register transitions.
Full Explanation
Speech Level Singing (SLS) is a vocal training method created by Seth Riggs in the 1970s-80s that became one of the most influential approaches in contemporary commercial music (CCM) pedagogy. The core principle is that the larynx should remain in a relatively stable, neutral position—similar to comfortable speech—throughout the entire vocal range.
SLS teaches singers to avoid pulling chest voice too high (which raises the larynx and creates strain) or flipping into a disconnected falsetto. Instead, it develops what SLS calls ‘mix’—a blended coordination that maintains connection between registers while keeping the larynx stable.
The method spread widely through certified teachers and influenced many subsequent approaches. While highly popular, some aspects have been debated and refined over time. Critics note that ‘speech level’ larynx position may not be appropriate for all styles, and that the method’s original claims have been modified as voice science has evolved. Many teachers trained in SLS have since integrated additional approaches into their work.
How Different Methods Define This
This term may be used differently across vocal pedagogy traditions: