Swedish independent recording studio, cassette duplication plant, as well as label, founded in August 1973 by Marcus Recording Studios.
It was equipped with the first 24-track tape recorder in Sweden and a few years later, the first computerized mixing desk in Scandinavia. In August 1976 a high-speed cassette duplicating plant was created and the first direct printing onto cassette was introduced. In 1979 the duplication plant moved into new premises.
The name of the studio was later changed to Soundtrade Studios.

Name variations:
- Marcus Studio
- Marcus Music Studio Solna
- Marcus Music Studio, Solna
- Marcus Studio, Stockholm
- Marcus Studios, Stockholm
- Marcus Music, Stockholm
- Marcus Music Studios, Stockholm
- Marcus Music AB
- Marcus Music ab
- Marcus Music AB Stockholm
- Marcus Music AB, Stockholm
- Marcus Music Ab, Stockholm
- Marcus Music AB/Stockholm
- Marcus Music AB, Solna
- Studio Marcus Music, Solna

Staff known to have worked there includes:
- Lars Rosin studio manager
- Jörgen Thuresson (2) maintenance engineer
- Christer Berg recording engineer
- Göran Stelin assistant recording engineer