Kwave uses the clipboard of Plasma. This way it is possible to exchange audio data between different Kwave windows. It might be possible as well to exchange data between Kwave and other audio applications, depending on their ability to use the Plasma clipboard.

When copying data to the clipboard through the copy function Kwave uses the mime type audio/vnd.wave as data format, conforming to RFC 2361 which is the same as the well known wav format. When pasting from the clipboard into Kwave all data formats that are available as file import formats are supported, like for example Ogg/Vorbis, FLAC and so on.