NTS regular Upsammy has been hosting Pacing The Platform w/ upsammy since 19 August 2020. On 3 April 2020, Upsammy was a guest on SHAPE+; and on 21 October 2018 was a guest on AD 93 w/ Tasker. Upsammy has been played over 120 times on NTS, first on 27 March 2018. Upsammy's music has been featured on 118 episodes.

Upsammy aka Thessa Torsing is an electronic artist and DJ from Amsterdam.

Thessa Torsing's unconventional sound has earned her a residency at De School and she currently lives in Amsterdam, not far from De School. After spending the first seven years of her life in Amsterdam, her family moved to Naarden, a small city in the north. When Torsing was 18, she moved to Utrecht to study Image and Media Technology at University Of The Arts Utrecht. By this point, she had started producing dance music inspired by what she heard at parties. Around this time she adopted the name upsammy, originally just for her visual art projects. It's taken from the song "Sammy" by Ramses Shaffy, a Dutch crooner who became popular in the '60s. During the winter of 2016, Torsing shut herself away in her bedroom and obsessively made tracks on Ableton, using the music as a way of escaping an unfulfilling internship. She began working the more psychedelic sounds of her youth—she used to be a massive Jimi Hendrix fan—into her productions. She uploaded a track called "Zona" onto SoundCloud and it was picked up by a local music head called Luke Cohlen, who invited her onto his radio show on the Utrecht station Stranded FM. There, she met Bob Verhoeven, another local head. He passed "Zona" to Sjoerd Oberman, founder of Nous'klaer Audio, a house and techno label from Rotterdam. Soon after, Oberman hit her up, asking for more tracks.

In September 2017, Nous'klaer released Paerels, a 12-track compilation of breezy ambient and techno. Torsing was the only artist to have more than one track featured. Next, in February 2018, came Torsing's first solo EP, Another Place, also on Nous'klaer.

Influential DJs—Avalon Emerson, Peach, Objekt—have supported Torsing's music, but it's her residency at De School that has arguably played the biggest part in her rise. Luc Mastenbroek, the club's booker, first discovered her in early 2017 via a Stranded FM mix. He booked her to play an ambient set in the garden on a sunny Sunday afternoon in July, followed a month later by a set in the airy second room upstairs, warming up for Jane Fitz. During one of the club's marathon ADE weekenders, she played in there again, this time taking the tricky Sunday morning-into-afternoon slot.

She released the album 'Wild Chamber' in 2019.