Aimée Portioli is a Berlin-based Dutch-Italian composer and sound designer who records and performs as Grand River.

Portioli makes experimental electronic music with rich emotional colours. Her work, influenced by minimalism and ambient music, is atmospheric yet rhythmically complex, incorporating a wide range of contemporary compositional and production techniques.

The name Grand River evokes nature, scale, and movement, all key forces in Portioli’s work. Her first release as Grand River was 2017’s Crescente, which was named by XLR8R as one of the best releases of the year. She followed this with her debut album Pineapple (Spazio Disponibile, 2018), which garnered praise from The Quietus among others, while its follow-up Blink A Few Times To Clear Your Eyes (Editions Mego, 2020) was positively received by Resident Advisor and The Verge, and was elected among best albums of 2020 by Inverted Audio.
Her work has separately appeared on compilations by Ghostly International, Tresor, and Longform Editions.
In 2023, her third album All Above, found its way back to shelves under Editions Mego. Then, in 2024, the new collaborative effort In uno spazio immenso emerged, a joint venture with Abul Mogard, debuted on Caterina Barbieri's light-years label.

In addition to her studio albums, Portioli also creates original sound art installations and worked with 4D spatial sound on several occasions. In 2025 she released her latest album Tuning the Wind which was created as an installation piece.

Portioli has performed as Grand River at major international venues and festivals, including Barbican Hall, CTM Festival, MUTEK, Centre Pompidou, MUTEK, Kraftwerk, Funkhaus, WOS Festival, Berghain, and many more. 
Since 2016 she runs the label One Instrument that invites artists to respond to a unique creative brief – to create a piece of music using just one instrument.

Aimée Portioli holds a bachelor’s degree from the Faculty of Linguistics and Communication of Milan. Her thesis explored the psychology of the communicative function of music in media.
Her work today is motivated by similar questions of sound and music as a form of communication that goes beyond language.

Selected Press

2025: Bandcamp, Best Ambient Music, March 2025
2024: In uno spazio immenso, Resident Advisor review
2023: All Above, Resident Advisor review
2022: Fact Magazine, Human Video Premiere
2022: Ableton Loop Session: In The Studio With Grand River
2021: Fact Magazine: Patch Notes
2020: Inverted Audio, Best Albums of 2020
2020: Resident Advisor, Best Music of September 2020
2018: XLR8R Artist Tips

Interviews

2025: Public Pressure
2025: 15 Questions
2023: Slim Filter
2023: Document Journal
2023: AIR Podcast
2022: Subbacultcha
2020: Document Journal

Mixes

2023: Fact
2023: Aurora Edition
2022: Crack
2022: Music From Memory
2021: Resident Advisor
2021: HÖR
2020: Dekmantel
2020: Beats In Space
2019: Blowing Up The Workshop

photo by Maria Louceiro