Indexical is pleased to present an evening of music from the Nathan Clevenger Group and composer/improvisor Marc Perez. The Nathan Clevenger Group will be performing new arrangements of pieces from 'Astrolabe' (2025), a suite for large ensemble, as well the debut of a newly composed piece from a developing 'Astrolabe Apocrypha.' Marc Perez performs "Present/Out Of," a new multimedia work exploring the boundaries and relationship between sound, text & community. This piece aims to bring forth the question "how much of yourself can you give in order to be present and active, listening within a space?"

Nathan Clevenger is an Oakland-born composer and multi-instrumentalist, working on the margins of modern composition, jazz, and free improvisation. Since 2003, Clevenger’s primary ensemble has been the Nathan Clevenger Group, which has ranged from 5 to 12 players and released four albums, most recently Astrolabe (2025). For Astrolabe, Clevenger expands his long-running Group to a 12-piece pocket chamber orchestra, featuring a five-member wind ensemble, cello, and a complement of three mallet percussionists augmenting the piano-bass-drums rhythm section. The seven-movement suite weaves together sounds and influences from 20th century concert music, jazz, film scores, collective and free improvisation, and percussion ensemble music, filtered through Clevenger’s singular compositional aesthetic. 

Beth Schenck: alto & soprano saxophones

Cory Wright: Bb & bass clarinets, alto flute

Ian Carey: trumpet

Lisa Mezzacappa: bass

Jon Arkin: drums, percussion

Jason Levis: percussion

Nathan Clevenger: keyboards, percussion

Marc Perez is a composer, performer, improviser, artist, author, curator and organization leader whose work is concerned with freedom of agency, access, trans-disciplinary arts & improvisation. As a performer, they have been featured at various festivals such as High Desert Soundings, Seoul International Computer Music Festival & Angel City Jazz Festival. As a composer, their works have been performed nationally and internationally in spaces ranging from universities and festivals to community resource centers, backyards and DIY spaces. They are a heavy practitioner of text in combination with sound, often creating text scores, poems, installations & art relating to both sound and text. 

Along with working as a curator for various shows, community focused events, and festivals throughout the year, they is also the co-founder and co-director of Sudden Somethings, an organization dedicated to the proliferation of activities, knowledge, research, and communal practices in improvisation across disciplines and non-disciplines.