Contrabass Conversations

Isaac Trapkus is a bassist with the New York Philharmonic, rosin maker, and developer of Monkey Wrench DB—a tool that syncs sheet music PDFs with YouTube performances. He's also the creator of a free urtext-style edition of the Koussevitzky Double Bass Concerto, based on a previously unknown personal score copy he discovered at the Library of Congress. We cover a wide range of topics: Isaac's years-long journey developing his handcrafted rosin (Winter), the unique acoustic challenges of the double bass that make rosin so stubbornly hard to get right, and his Library of Congress discovery of Koussevitzky's clean personal score—complete with hidden measures taped over by the composer himself. We also dig into AI's expanding role in Isaac's tech projects, the ethics of open-source music tools, and the tension between building things because you can versus building things that actually matter. Find Isaac's Koussevitzky edition on IMSLP, explore Monkey Wrench DB at monkeywrenchdb.org, and check out his past podcast appearance here. Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg

Bassist and arts administrator Thomas Zera joins us today to share what changed between our first chat years ago and now, including life in the Utah Symphony and the path that led to building his new project, The Sub Pool. We dig into what The Sub Pool is, why orchestra sub lists so often "run dry," and how a centralized, musician-friendly platform can help personnel managers find the right players, including for rarer instruments and big-repertoire needs. Tom also explains how the service is designed to be low-friction for musicians, what feedback has shaped the early feature set (including faster notifications), and what they're building toward next. Learn more at The Sub Pool, reach Tom at [email protected], and check out his past podcast appearance here. Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg

Casey Lipka is a Los Angeles–based singer, songwriter, bassist, and collaborator with a gift for building community around music. In this episode, Casey shares the winding path that brought her into jazz voice, bass, and a creative life that blends composing, performing, and heartfelt projects. Along the way, Casey talks about how coaching shaped her work supporting other artists, and why creating space for connection has become such a central part of what she does. Jason and Casey dig into what it looks like to move through "seasons" of creativity, from album release mode to collaboration mode, and how routines like strength training and time in nature can support the physical and mental demands of making music. They also talk about the joy of live performance, the inspiration of Nina DeCesare's recent Bach marathon, and Casey's new Women in Music series featuring performance-plus-conversation collaborations. Enjoy, and follow along with Casey and her great work on her website, YouTube, Instagram, and listen on Spotify or Apple Music. Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg

This episode with Johnny Hamil and friends is a celebration of the music of Lloyd Goldstein. Enjoy this, and be sure to join Johnny and company March 21st at 11am Central Time via Zoom. You can visit KC Bass Workshop for more information and details. Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg

In this episode, we're joined by bassist, composer, and bandleader Marlonius aka, Marlon Martinez, the creative force behind the Marlonius Jazz Orchestra. We talk about growing up in a deeply musical family, moving through a serious classical conservatory track at Colburn, and the long arc of building a personal sound. We dig into Marlon's early encounters with Stanley Clarke, what it means to live in the "in-between" of jazz and classical worlds, and how rhythm (including Marlon's time on drum set) shapes everything from groove to orchestration. We also get into Billy Strayhorn's legacy, why Marlon is so drawn to Strayhorn's voice, and what's coming next for Marlon's first full-length Marlonius Jazz Orchestra studio album. Follow Marlon on Instagram and check out The Strayhorn Sessions Vol. 1 on Spotify and Apple Music, plus more videos on YouTube. Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg

John Mietus is a composer, double bassist, and conductor, currently Associate Principal Bass with the Auckland Philharmonia. Born in Hong Kong and raised in Ohio, John started playing bass at age four and went on to study with some legendary teachers while building a career that spans orchestral playing, chamber music, teaching, and composition. In this episode, John and Jason dig into John's world-premiere performance of the "Butterfly Lovers Violin Concerto" (He Zhanhao and Chen Gang) on double bass with orchestra in Changsha, China, on January 1, 2026, and what it took to make a faithful transcription of such an iconic work. John shares how he approached the arranging process, why he ultimately chose fifths tuning, the practical realities of living in that tuning for months, and the string setup that helped him pull it off. They also discuss expanding the bass repertoire through transcription, the ways conducting and composing enhance a bassist's musicianship, and John's work as a teacher. Enjoy, and follow John on his website, Instagram, and YouTube! Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg

Niklas Lukassen is a German bassist, composer, and doctoral researcher splitting his time between London and Berlin. His bandleader debut album Still Waters releases February 20th on Kurt Rosenwinkel's Heartcore Records with liner notes by Ron Carter. The quartet features Ben Van Gelder on saxophone, Kit Downes on piano, and Francesco Ciniglio on drums, with guest appearances from Rosenwinkel, Wanja Slavin, and Geoffroy De Masure. Niklas is also exploring the bass cello—a unique hybrid instrument—in his trio with Gwilym Simcock and James Maddren, while pursuing doctoral research at the Royal Academy of Music on the reciprocal effects of bass doubling. In this conversation, we explore Niklas's musical journey from a tiny village in Germany's Black Forest to studying at Manhattan School of Music with Ron Carter, his forced exit from New York during the pandemic, and how he rebuilt his career between London and Berlin. We discuss the different scenes and aesthetics of these global jazz cities, his approach to playing upright bass, electric bass, bass guitar, and the bass cello, and how working with different instruments sparks new improvisational ideas. Niklas shares insights on collaboration, giving space in the music, and the challenges and gifts of constantly adapting to new instruments and environments. Enjoy, and connect with Niklas at his website and Instagram! Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg

Jon Henriksson is a Stockholm-based double bassist and composer who has become one of the leading voices in the contemporary Scandinavian jazz scene. Born in 1996 in Gothenburg, his path to the bass started when a high school big band director gave him just two months to learn the instrument for a Christmas concert. His 2023 debut album Harmonia placed second in Orkesterjournalen's Golden Album readers' poll, and his new album Shapeshifter drops March 20th, 2026, featuring a quartet with pianist Rasmus Sørensen, drummer Jonas Bäckman, and saxophonist Karl-Martin Almqvist. In this conversation, Jon talks about discovering bird watching and nature photography during the pandemic as a counterbalance to musical life. He shares his compositional process of improvising at the piano and layering ideas on his phone, the Swedish folk high school system that's created a vibrant jazz pipeline to Stockholm, and the jam sessions he hosts twice weekly at Stompin in Old Town. Jon explains how he writes music drawing from Brazilian influences, folk, and pop alongside jazz traditions, and why he wanted Shapeshifter to give space for his favorite musicians to express their personalities. Connect with Jon on Instagram, and listen to his music on Spotify, Apple Music, and YouTube. Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg

Chris Jennings is a Canadian left-handed double bassist who's been based in Paris since 2002, traveling extensively across jazz and world music projects to all corners of the globe. A D'Addario Orchestral Artist, Chris has carved out a unique niche playing in ensembles where there's often no bass part written, working with artists like Nguyên Lê, Dhafer Youssef, and exploring the rhythmic complexities of Gnawa music. In this episode, Chris shares the story of his game-changing Petite Double Bass made by Polish luthier Piotr Poludniak — a hand-carved, neck-off instrument that weighs just 12kg in its carbon fiber case and sounds remarkably like a full-size acoustic bass. We also dive into his bow technique journey with Tom Martin and Edgar Meyer, his philosophy of being "in service to the music," his travel productivity hacks, the polyrhythmic world of Gnawa music, and much more. Enjoy, and connect with Chris on Instagram, Facebook, and YouTube! Connect with DBHQ Join Our Newsletter Double Bass Resources Double Bass Sheet Music Double Bass Merch Gear used to record this podcast Zoom H6 studio 8-Track 32-Bit Float Handy Recorder Rode Podmic Sony Alpha 7 IV Full-frame Mirrorless Interchangeable Lens Camera Sony FE 16-35mm F2.8 GM Lens Sony FE 24-70mm F2.8 GM Lens When you buy a product using a link on this page, we may receive a commission at no additional cost to you. Thank you for supporting DBHQ. Theme music by Eric Hochberg