SoX source code is distributed under two main licenses. The twolicenses are in the files LICENSE.GPL and LICENSE.LGPL. sox.c, and thus SoX-the user application, is distributed under theGPL, while the files that make up libsox are licensed under the lessrestrictive LGPL. Note that some of the external packages that can be linked into libsoxare GPLed and/or may have licensing problems, so they can be disabledat configure time with the relevant--with-* options. If libsox is builtwith such libraries, it must be distributed under the GPL.