On Sunday, April 26, 2026, the Spanish public broadcaster RTVE aired an episode of its long-running music program Los Ultrasónicos titled Doctor Soul: Seis grados de separación. The episode, hosted by Jesús Bombín and Kiko Helguera, explored the concept of six degrees of separation through a curated musical journey spanning continents and genres. According to the program’s description on RTVE Play, the present began with the Cuban band Los Zafiros’ 1962 track “Bossa cubana” and proceeded to link songs from diverse artists such as Ry Cooder, Cecilia, Chico Buarque, Daniel Viglietti, Charlie Haden, Pat Metheny and David Bowie, The Rolling Stones, Robert Johnson, Eric Clapton, Johnny Otis, Traffic, Shuggie Otis and Talking Heads. The broadcast was part of the program’s regular Sunday evening slot from 19:00 to 22:00 on Radio 3, RNE’s youth-oriented music channel.
The episode’s title references the sociological theory popularized by psychologist Stanley Milgram in the 1960s, which posits that any two individuals on Earth are connected by no more than six social links. In this musical adaptation, the hosts used the idea to create a seamless progression of tracks where each song shares a thematic, lyrical, or historical connection with the next, illustrating how cultural influences can traverse geographic and stylistic boundaries. The concept was framed not as a rigid academic exercise but as an imaginative listening experience designed to highlight unexpected affinities between artists and eras.
Los Ultrasónicos, which has aired since 2004, is known for its eclectic programming that blends music from science fiction, humor, novelty releases, and musical archaeology. The show’s official RTVE page describes it as featuring “músicas de todos los colores y fragancias” — music of all colors and fragrances — aimed at listeners seeking sonic exploration beyond mainstream offerings. Episodes are available for streaming on RTVE Play, the broadcaster’s on-demand platform, and are often promoted through its social media channels, including Facebook, where clips and announcements are regularly shared.
The April 26 episode followed a pattern seen in recent installments of the program, such as the April 19 tribute to Prince titled Diez años sin Prince and the April 5 episode featuring Tom Waits, Odetta, and Eric Burdon. These thematic deep dives reflect the program’s editorial approach of dedicating episodes to specific artists, genres, or conceptual frameworks, often with historical context and rare recordings. The show’s hosts, Bombín and Helguera, are regular contributors known for their knowledgeable and enthusiastic presentation style, frequently drawing connections between music, culture, and history.
While the specific musical selections for Doctor Soul: Seis grados de separación were listed in the RTVE Play summary, independent verification of the exact tracklist or detailed commentary from the broadcast requires access to the full audio recording, which is archived on RTVE’s platform. As of the date of airing, no official transcript or published analysis of the episode’s content was available through major international news outlets or music publications. But, the program’s consistent format and thematic focus align with its established identity as a curator of global musical narratives.
The idea of six degrees of separation has been referenced in various cultural contexts beyond sociology, including in film, literature, and music. A notable example is the 1993 film Six Degrees of Separation, based on John Guare’s play, which examined social connectivity through a fictional narrative. In music, artists and radio programs have occasionally used the concept as a framing device for mixtapes, radio shows, or collaborative projects that emphasize interconnectedness across genres — a approach mirrored in this episode of Los Ultrasónicos.
For listeners interested in exploring the musical connections highlighted in the episode, RTVE Play offers on-demand access to the full broadcast. The platform allows users to stream episodes of Los Ultrasónicos and other Radio 3 programs without subscription, though availability may be subject to regional licensing restrictions. The corporation encourages audience engagement through its social media presence, where fans can comment on episodes and share favorite tracks.
As radio programming continues to evolve in the digital age, shows like Los Ultrasónicos represent a enduring model of specialist music curation that prioritizes depth, diversity, and intellectual engagement over commercial playlists. By framing listening as an act of discovery — where one song leads to another through invisible threads of influence — the program invites its audience to reconsider how music moves across time and space.
The next scheduled episode of Los Ultrasónicos was not publicly announced in advance through verified international sources at the time of this writing. Listeners seeking updates are advised to consult the official RTVE Play calendar or the program’s social media channels for the most accurate and up-to-date information on future broadcasts.
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