update README

README.md

@@ -1,7 +1,6 @@
 # BEAMGRID
 
-A JUCE-based VST3 / AU spectrum analyzer with a fully black UI, teal accents,
+BEAMGRID is a JUCE-based VST3 / AU spectrum analyzer with a fully black UI, teal accents, and a configurable display.
-and a configurable display.
 
 ## Screenshots
 ![Screenshot 01](beamgrid01.png)
@@ -11,13 +10,10 @@ and a configurable display.
 
 - **Three display modes** (`MODE` knob):
   - **BARS** - classic log-spaced spectrum bars with peak-hold caps.
-  - **SPECTRUM** - a smooth (quadratic-spline) waveform trace of the spectrum,
+  - **SPECTRUM** - a smooth (quadratic-spline) waveform trace of the spectrum, with a matching smooth peak-hold wave. Use the `SMOOTH` knob to go from raw/edgy to heavily smoothed.
-    with a matching smooth peak-hold wave. Use the `SMOOTH` knob to go from
-    raw/edgy to heavily smoothed.
   - **LED** - an LED-meter style view (`LEDS` knob sets LEDs per bar).
 - **Frequency range** fixed to **20 Hz – 20 kHz**.
-- **HUE** knob rotates the hue of every UI accent (knob arcs, peaks, title)
+- **HUE** knob rotates the hue of every UI accent (knob arcs, peaks, title) without altering the underlying data.
-  without altering the underlying data.
 - **UI scaling** dropdown (75% – 300%) in the top-right.
 - Per-project **size & scale persistence** (stored in the plugin state).
 
@@ -28,7 +24,7 @@ and a configurable display.
 | PEAK GRACE  | 0 – 2000 ms      | Grace period before a peak-hold marker decays |
 | PEAK FALLOFF| 0 – 1            | Peak-hold decay rate                          |
 | BAR FALLOFF | 0 – 1            | Spectrum bar release speed                    |
-| BARS        | 8 / 16 / 32 / 64 / 128 | Number of spectrum bands (snaps)          |
+| BARS        | 8 - 128          | Number of spectrum bands (snaps)              |
 | HUE         | 0 – 1            | Rotates the UI accent hue (0.5 = no change)   |
 | MODE        | 1 / 2 / 3        | BARS / SPECTRUM / LED                         |
 | LEDS        | 4 – 48           | LEDs per bar in LED mode                      |
@@ -45,9 +41,36 @@ and a configurable display.
 ## Building
 
 Requires [CMake](https://cmake.org/) (>= 3.22) and a JUCE-supported
-toolchain (Xcode / clang on macOS, MSVC / GCC on Windows, etc.). JUCE is
+toolchain (Xcode / clang on macOS, GCC / Clang on Linux, etc.). JUCE is
 fetched automatically by CMake.
 
+### macOS
+
+```sh
+cmake -B build -G Ninja
+cmake --build build --config Release
+```
+
+### Linux
+
+Install the JUCE system dependencies, then build:
+
+```sh
+# Debian / Ubuntu (DEB)
+sudo apt-get install -y libasound2-dev libfreetype6-dev libx11-dev \
+  libxcomposite-dev libxcursor-dev libxext-dev libxinerama-dev libxrandr-dev
+
+# Fedora (RPM)
+sudo dnf install -y alsa-lib-devel freetype-devel libX11-devel \
+  libXcomposite-devel libXcursor-devel libXext-devel libXinerama-devel libXrandr-devel
+
+# Arch Linux / Artix
+sudo pacman -S alsa-lib freetype2 libx11 libxcomposite libxcursor \
+  libxext libxinerama libxrandr
+```
+
+Build BEAMGRID:
+
 ```sh
 cmake -B build -G Ninja
 cmake --build build --config Release
@@ -56,10 +79,14 @@ cmake --build build --config Release
 The built plugins are installed to your system plugin folders:
 
 - `build/BEAMGRID_artefacts/Release/VST3/BEAMGRID.vst3`
-- `build/BEAMGRID_artefacts/Release/AU/BEAMGRID.component`
+- `build/BEAMGRID_artefacts/Release/AU/BEAMGRID.component` (macOS only)
 
 Then rescan in your DAW (FL Studio, REAPER, Logic, etc.).
 
+### Windows
+
+It *should* work on Windows, too, but I have not tested that, and I have zero intentions to do so. Good luck.
+
 ## Project layout
 
 ```
@@ -74,3 +101,4 @@ Source/
 ## License
 
 See the repository license file.
+