invada_studio_plugins_lv2 (Audio plugins for LV2) Plugins include delay, tube warmth/distortion simulation, compression, low and high pass filters, stereo phaser, reverb, an input module, peak/VU/spectrograph meters, and a test tone generator. As shipped, the package is built with -O3. If you for some reason want to use Slackware standard CFLAGS, set FORCE_SLACK_CFLAGS=yes in the build environment.