Metric Halo - ChannelStrip for GarageBand (Mac)

ChannelStrip is the recognized leader in console-style channel strip audio processing for digital audio workstations.
The ChannelStrip for GarageBand package includes the GarageBand-specific AU plug-in, more than 120 general purpose ChannelStrip presets, and the GarageBand specific "channel strip file" presets to optimize both software instruments and entire mixes.
ChannelStrip for GarageBand will only run within GarageBand, the plugin will only run in demo mode within other AU hosts.
ChannelStrip GB costs $89