Add the Echo effect
tree09d387064dc5beece6a9d8cfeb3b034c7f5ea0d3
-rw-r--r-- 10 .gitignore
drwxr-xr-x - Alc
drwxr-xr-x - CMakeConf
-rw-r--r-- 12960 CMakeLists.txt
-rw-r--r-- 25269 COPYING
drwxr-xr-x - OpenAL32
-rw-r--r-- 921 XCompile.txt
drwxr-xr-x - admin
-rw-r--r-- 7747 alsoftrc.sample
-rw-r--r-- 1842 config.h.in
drwxr-xr-x - examples
drwxr-xr-x - include