Martin says:

There's something seance-like (I guess...I've never been to a seance...) about the communion of six performers all facing in towards each other, intensely focused, and the sounds we hear being so far removed from the gestures we're seeing...

(for if you don't read the descriptions under YouTube videos: the pianists are playing variously Gesulado madrigals and their own choice of etudes from the repertoire; Federico is using the output from the keyboards as the basis for his live electronics, which is what we hear.)

[from federicoreuben.com]

Federico was born in San José, Costa Rica in 1978. He studied politics and piano performance at the Universidad de Costa Rica and music at the University of Maryland, College Park, USA. He studied composition with Louis Andriessen, Richard Ayres, Gilius van Bergeijk and Martijn Padding at the Royal Conservatoire, The Netherlands. He also attended a one-year course at the Institute of Sonology, studying human-computer interaction, digital signal processing and algorithmic composition. He holds a PhD from Brunel University, London, UK, where he studied with Richard Barrett and Christopher Fox. He is currently Senior Lecturer in Music Technology at The University of York.

Federico’s work has been presented, per­formed and broad­cast world­wide and fea­tured at lead­ing music and art fes­ti­vals. He has writ­ten instru­men­tal, vocal and mixed media com­po­si­tions for ensem­bles and soloists includ­ing Ensem­ble MAE, Ensem­ble Klang, Sarah Nicolls, RIAM Per­cus­sion Ensemble, Roent­gen Con­nec­tion, Royal Ensemble and Singers, Python Saxophone Quartet and Piano Cir­cus.

He is active as a live electronics performer often collaborating with Adam de la Cour, Neil Luck, Loré Lixenberg, Mark Knoop, Mowgli, Perro-chimp, Fiona Bevan, Steve Potter and Matthew Lee Knowles. As a lap­top improviser he has performed with impro­vis­ers such as John Edwards, Steve Noble, Mark Sanders, London Improvisers Orchestra, Tony Marsh, Alekander Kolkowski, Ingrid Laubrock, Alexan­der Hawkins, Dominic Lash, Roland Ramanan, Javier Car­mona, Ricardo Tejero, Mark Hanslip and Rachel Musson.

As a sound artist he has expe­ri­ence with sound and robotic instal­la­tions, fixed elec­troa­coustic and mixed media works, interactive environments and cross-arts col­lab­o­ra­tions. He has worked with/for artists including Trisha Donnelly, Rachel Rose, Stelarc, Bruce McLean and San Belinfante.

He is also co-founder of squib-box with Adam de la Cour and Neil Luck. squib-box is artist-led organisation and netlabel that promotes radical music and interdisciplinary performance.