In the left hand panel of the dialog that opens you should see a sub-heading VST Effects. To add a VST effect to one of your tracks, click the Fx button in the track control panel on the left of the track. A good place to start your search is here:

VST plugins are available from a wide variety of sources - some are free, while others require licences. Other plugins may provide some type of visual feedback of the audio signal. You can use effect plugins to add an effect to one of your tracks, or you can use instrument plugins to synthesize playback of MIDI files. You can use these plugins to enhance MixPad's capabilities. MixPad supports Virtual Studio Technology (VST) plugins. Record instruments or vocals for music production in your home or on the go.Basics - VSTs VST and VSTi Plugin Support MixPad Multitrack Free Recorder can help you create your own mash-ups of your favorite audio files. + Apply effects such as: EQ, reverb, compression, and much more! + Save in any file type you need, from studio quality wav files to high compression formats. + Output MixPad files to mp3, burn to a CD or upload to share with friends and family. + Enjoy a royalty-free, music clip library.

+ Add and mix an endless amount of vocals, audio tracks, and other music. + Record an individual or multiple tracks at a time. MixPad Multitrack Recorder Free can help you optimize your audio quality while helping minimize the time spent working on your project. MixPad Free for OS X makes the mixing process fun and intuitive with the helpful Graphic User Interface. You can have the power of a professional recording and mixing studio on your Mac. MixPad Multitrack Free Recording Studio Software is a professional multi-track recording and mixing software. MixPad Multitrack Recording Software Free

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