Differences

This shows you the differences between two versions of the page.

--- noiz-box [2020/02/03 21:43] – [Waveshaper (graph) section] shane
+++ noiz-box [2023/05/08 18:59] (current) – external edit 127.0.0.1
@@ Line 37: / Line 37: @@
 ===== Waveshaper (graph) section =====
 The **graph** section in the middle of the //NoizBox// GUI represents the nonlinear wave-shaper block, which is the heart of the distortion unit.
+The graph itself represents the positive half of the distortion response curve, i.e., how the wave-shaper responds to positive-valued input samples. The negative half of the curve is identically shaped, but reversed in both X and Y directions.
 Clicking on the graph pops up an editor window like this:
 {{::noizbox-2.png|}}
+The **pop-up menu at the top left** allows you to select the basic curve shape:
+  * **OFF** disables the Distortion entirely
+  * **Exponential** and **Power Curve** are two variants of a convex curve
+  * **Hard Clip** provides a variable linear gain segment with clipping at maximum amplitude
+  * **Soft Clip** provides a high-gain segment and a low-gain segment, with a smooth "knee" between them
+  * **Quantize** yields an adjustable stair-step curve
+  * **Custom** yields a curve you can edit into just about any shape--see below.
+Immediately to the left of the large graph box is a vertical **Strength slider**. For the exponential, hard clip, soft clip, and quantize shapes, this adjusts the amount of distortion, ranging from linear response (no distortion) when the "thumb" (green dot) is all the way to the bottom, to extreme distortion when all the way to the top.
+===== Editing Custom distortion curves =====
+When you select //Custom// from the curve-shape menu, the large graph area becomes an interactive //curve editor// which works basically the same as the editors for MIDI-velocity curves in Unify.
+  * Drag either endpoint (circles) up or down to change the output range
+    * You can drag the right-hand endpoint //below// the left one for an inverted response (increasing input signal results in //decreased// output signal, aka "fold-over")
+  * Drag up/down on the line between the endpoints to adjust the shape of the curve (convex or concave)
+  * //Double-click// between endpoints to add a new "split point"
+    * This splits the curve segment in two
+    * Split points can be dragged up/down and left/right
+    * Individual curve segments can be dragged up/down to adjust shape
+  * Double-click any split point to delete it
+    * This merges two segments back into one
+===== Resetting, Saving and Loading curve presets =====
+//NoizBox// allows you to save distortion curve-shapes individually as //Distortion Curve Presets//. Note all of the different curve-types can be saved this way, not just "custom" curves.
+  * Click the **Reset** button to reset the distortion curve to a straight line (no distortion at all)
+  * Click the **Save...** button to save the current curve shape to a new preset file
+    * A standard file-save dialog will pop up, allowing you to choose the file name and location
+    * It is recommended to stick with the default location, which is a folder called //Distortion Curves// within the main Unify //Presets// folder
+  * Click the **Load...** button to re-load a previously saved preset
+    * A standard file-open dialog will pop up, with the standard //Distortion Curves// folder already selected