m4-1.4.12: registering info file /usr/pkg/info/m4.info
autoconf213-2.13nb1: registering info file /usr/pkg/info/autoconf213.info
automake14-1.4.6: registering info file /usr/pkg/info/automake14.info
pkg_add: package `autoconf213-2.13nb1' was already installed as dependency, now marked as installed manually
gettext-lib-0.14.6: copying /usr/pkg/share/examples/gettext/locale.alias to /usr/pkg/share/locale/locale.alias
gmake-3.81: registering info file /usr/pkg/info/make.info
pkg_add: package `libao-0.8.8' was already installed as dependency, now marked as installed manually
pkg_add: package `libogg-1.1.3' was already installed as dependency, now marked as installed manually
libidn-1.13: registering info file /usr/pkg/info/libidn-components.png
libidn-1.13: registering info file /usr/pkg/info/libidn.info
Executing '/bin/mkdir -p -p '/usr/pkg'/lib/ao/plugins-2'
===========================================================================
$NetBSD: MESSAGE.common,v 1.3 2008/12/18 16:36:11 jmcneill Exp $

This libao package provides its core library but no output plugins
by itself.  You will have to install an audio/libao-* plugin package
in order to get audio working.

  libao-arts    --  aRts plugin
  libao-esound  --  EsounD (ESD or Enlighten Sound Daemon) plugin
  libao-macosx  --  MacOS X plugin
  libao-oss     --  OSS (Open Sound System) plugin
  libao-pulse   --  PulseAudio plugin
  libao-sun     --  Sun audio plugin

Not all are available on every platform.

===========================================================================