Spontaneous A Cappella

Collaborative Vocal Improvisation

New Series Starting OCTOBER 2026

Spontaneous A Cappella is a more advanced, small-group improvisation practice, based on the Vocal River forms created by Rhiannon. We'll learn and practice ways to create vocal music together, without a score, chart or leader.

A deeper dive into improvisational singing, this series is for confident singers who want to hone their improv skills.

Intro to Vocal River: This is a series of six 90-minute sessions where we learn and practice the basic Vocal River toolkit. The focus is on becoming familiar with the forms, deep listening, blending as a group, and learning to improvise together collaboratively. 

Who should sign up… singers should be able to match pitch, hold a rhythm, create a harmony, and blend with other singers. You should be willing to experiment, stretch your comfort zone, and grow musically through gentle feedback. 

What to expect… Every form we practice is a cappella, spontaneous, and improvisational. Forms range in participation from the entire group singing at the same time, to smaller breakouts, including duets, trios, solos, etc., both with group backing and on their own. 

What are the benefits… No matter what level singer you are, this practice will deepen your listening skills, free up your improvisational brain and voice, and strengthen your compositional skills. These exercises build skills in listening, creativity, trust, forgiveness, collaboration, generosity, and flexibility — useful tools for music and for life.

Limit: 12 Singers

DETAILS: Spontaneous A Cappella: Intro to Vocal River
What: Spontaneous A Cappella — Six Class Series
Dates: 
• Denver: October 7 - November 11
• Boulder: October 12 - November 16
Times
• Denver: 5:30 - 7:00 p.m.
• Boulder: 5:30 - 7:00 p.m.
Where: Locations sent to registered participants
Pricing: $135 - $165, Sliding Scale
Register: via the form below

Limit: 12 Singers each cohort

Questions? Email Roy 

Registration - Spontaneous A Cappella, intro to Vocal River

Please complete the form below. When you submit the form, you will be re-directed to a confirmation page. If you're not re-directed, please EMAIL ROY. 

 (And if the form doest not go through, please take note of what happened exactly when you hit ‘submit’… we're trying to get to the bottom of a recurring, intermittent problem.)