The History of filtersД®lectronic filters emerged in the 1910вЂ™s by an inventor called George Campbell and were made of either resistors and capacitors or resistors and inductors and weвЂ™re originally designed for AT&T, the American telephone company. As they respond to an envelope, it can remove unwanted frequencies as amplitude and time of a signal goes on. As a mixing tool, envelope filters can also provide an interesting edge to your mix as well. These plugin types will give you an incredible edge to your sound design capabilities, allowing you to create grimey resonant screeches, sci-fi type wobbles or classic filter type movements. Envelope filters are not one of the most well known plugin types but their uses are far reaching, especially as some plugins of this type come with additional controls like LFOвЂ™s and sequencers. ItвЂ™s a filter, for example a low pass or high pass filter which has envelope controls like a compressor or a dynamic eq does. What is an envelope filter and what does it add?ДЄn envelope filter is a simple concept. Filters can move, or remain static, and itвЂ™s the filters that move is what this blog post focuses on, filters we like to call вЂenvelope filtersвЂ™. They will also usually have a resonance control, which allows you to boost a frequency at the cutoff point. A filter cut will generally have a control for selecting the frequency you want to remove, or the point at which you want to make a cut, and by how much you want to cut it. Filters for your DAW come in many forms high pass, low pass, band pass, band stop, notch, double notch and more weird and wonderful variations. In the case of music production, it removes frequencies from an audio signal, not necessarily muddy frequencies, but frequencies that you donвЂ™t need at that moment in the track. In the case of making coffee, a filter removes the used grains from the delicious tasting liquid that you will eventually drink. What is a filter?ДЄ filter is a device, or object, that removes unwanted or selected parts of what it acts on.

What are they? Well read on to find out exactly how they work, with some history, audio examples and a technical description from deniseвЂ™s plugin developer. This blog post focuses on the mystery behind envelope filters. Denise audio breaks down the technical details behind plugins and helps you understand how they really work.