The default make compiles an esound version, just:

make
make install

to install gkrellmss.so in /usr/local/lib/gkrellm/plugins.
Or, you can copy src/gkrellmss.so to ~/.gkrellm/plugins

Then, when you run gkrellm, go to the plugins page of the config
and enable "Sound Scope".

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To compile a GKrellMSS using alsa 0.5:

make alsa5
make install

