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Summary:
`playback` function was added in https://github.com/pytorch/audio/issues/3026, the function only supports MacOS, hence the tests should be skipped on other OS. The PR skips the tests on linux gpu machines on Circle CI.

Pull Request resolved: https://github.com/pytorch/audio/pull/3141

Reviewed By: xiaohui-zhang, mthrok

Differential Revision: D43760546

Pulled By: nateanl

fbshipit-source-id: 606907127feee28a66f61baca000a8ef708f8086