wip/alsa-plugins 1.0.18nb1 NetBSD

The Advanced Linux Sound Architecture (ALSA) provides audio and MIDI functionality to the Linux operating system. ALSA has the following significant features:

\* Efficient support for all types of audio interfaces, from consumer
  sound cards to professional multichannel audio interfaces.
\* Fully modularized sound drivers.
\* SMP and thread-safe design.
\* User space library (alsa-lib) to simplify application programming
  and provide higher level functionality.
\* Support for the older Open Sound System (OSS) API, providing binary
  compatibility for most OSS programs.

This package provides the plugins for OSS, JACK, etc.