It is very unlikely that this work is public domain in the EU, or in any country where the copyright term is life-plus-70 years. However, it is in the public domain in Canada (where IMSLP is hosted) and other countries where the term is life-plus-50 years (such as China, Japan, Korea and many others worldwide). As this work was first published before 1926 or failed to meet notice or renewal requirements to secure statutory copyright with no "restoration" under the GATT amendments, it is very likely to be public domain in the USA as well.
|Composition Year||1908 August|
|Genre Categories||; ;; ; ;|
|Opus/Catalogue NumberOp./Cat. No.||BVN 34|
|I-Catalogue NumberI-Cat. No.||IRL 3|
|Year/Date of CompositionY/D of Comp.||1908 August|
|First Performance.||1909 February 7
|Average DurationAvg. Duration||6-9 minutes|
|Composer Time PeriodComp. Period||Early 20th century|
|Instrumentation||piano, violin, cello|
The 2nd movement of Langgaard's first symphony (1908-11)* is an orchestration of this movement, so fans of the composer (or even fans of that symphony, which has been recorded once or twice more often than most of his others) may well recognize this piece just from there.
Information on premiere of the intermezzo in trio form can be found at p.129, Vinholt Nielsen, "Rued Langgaards kompositioner: annoteret værkfortegnelse" (1991).
*but that said- a symphony given a sort of premiere even so in an abridged form - on the piano by the composer as a suite in November 1908; the missing movement was not this one but the finale. The symphony wasn't premiered in full until 1913.