NSA files exist as 2 different types. Please find information about each of them below.
Type 1: Nullsoft Streaming Audio File
The Nullsoft Winamp software prompted Nullsoft to develop the Nullsoft Streaming Audio File. These .nsa files stream audio clips and music via the Internet using Winamp and other streaming programs. W...
The Nullsoft Winamp software prompted Nullsoft to develop the Nullsoft Streaming Audio File. These .nsa files stream audio clips and music via the Internet using Winamp and other streaming programs. Winamp can also create and stream audio in the NSA format. Currently NSV uses MP3 for audio and VP3 for video. NSA files contain only audio.
Files with the NSA extension relate to the Nullsoft Winamp streaming format. Use Winamp to open NSA audio files. Compatible tools may export NSA files.
The NSA format streams audio clips like song demos over the Internet. NSA sequences and tracks play audio in Winamp. Nullsoft uses NSV extensions for streaming video. So NSA files do not include audio tracks themselves.
Problems opening NSA files often relate to incorrect associations. Follow instructions to quickly associate NSA with the right program.
Winamp
VLC media player
Foobar2000