Depending on how well a filter attenuates or the way it attenuates gives us an idea of the type of sound we will achieve with an analogue filter. That is why the filters of an Arp or Oscar etc, are so much more expressive and warm as they rely completely on the resistors and capacitors to, first warm up, then to work but in a gradual mode(gradual meaning sloped or curved as opposed to instant). Today’s technology allows for instant cut-off as the filter attenuation is determined by algorithms as opposed to circuits. We try to cut out or block frequencies below a certain point and allow the higher frequencies through.Īnalogues use circuitry and for that reason alone, it takes time for the filter to attenuate frequencies, in proportion to the distance from the cut-off point. In the case of a high pass filter, the opposite is true. Put simply: in the case of a low pass filter, we are trying to block the (higher) frequencies above a certain point and allow the lower frequencies through. In the case of a high pass filter, the frequencies below the cut off are attenuated. In the case of a low pass filter, the frequencies above the cut off are attenuated. This ‘lowering of the volume of the frequencies,’ is called Attenuation. The filter will lower the volume of the frequencies above or below the cut-off frequency depending on the type of filter used. This is the point (frequency) at which the filter begins to filter (block or cut out). Which frequencies are removed and which frequencies are left depends on the type of filter you use. To understand how to modulate any parameter of a filter unit one must bite the bullet and swallow some theory and background information on what filters are and how they work.Ī filter allows you to remove unwanted frequencies and also allows you to boost certain frequencies. That has now changed and more and more producers are realising the power that filter modulation provides in mixing tasks. It is a process that has been in existence since the first decent analogue synthesizers were built but it has always been a step away from reaching producers as a mix colouring tool. Using Modulation with a Single Band Filter – Soundtoys FilterFreak is a video tutorial that explains how to use a modulator to control various parameters on the FilterFreak.įilter modulation opens up the world to us sound designers who like to create custom sounds for our mix projects.
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