# Making a tremolo patch {% embed url="" %} Let's try out a really simple patch - a tremolo. This showcases two very powerful blocks for processing control signals such as the pot inputs. \#1 - the Scale/Offset block lets you constrain the low and/or high range of a control to make sure that the thing that you want to adjust is set just right. \#2 - the Power block lets you set a control so it comes in faster or slower relative to the rotation of the pot. Further explanation of the "Tremolizer" block is in order. If you use the width control on the Sin/Cos LFO, then this will adjust the swing around the center point (which is 0 when the output range is set to -1.0 to 1.0 and 0.5 when the output range is set to 0.0 to 1.0). What I really want is for the LFO signal, going from 0.0 to 1.0, to REDUCE the gain of the audio signal as the LFO amplitude increases. Otherwise you are left with the possibility that then the width is 0, you will have no volume at all coming out of the tremolo. The Tremolizer uses some clever internal scaling to give you this without having to think too much about it. Here's a[ link to the patch file](https://github.com/HolyCityAudio/SpinCAD-Designer/raw/master/patches/tremolo.spcd). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://holy-city-audio.gitbook.io/spincad-designer/patches/making-a-tremolo-patch.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.