gnu: Add zlfo.

* gnu/packages/music.scm (zlfo): New variable.

Signed-off-by: Jakub Kądziołka <kuba@kadziolka.net>

gnu/packages/music.scm

@@ -5265,3 +5265,31 @@ plugin support, JACK support and chord assistance.")
 hall reverb and a room reverb.  Both are available as LV2 plugins as well
 as JACK standalone applications.")
     (license license:gpl3+)))
+
+(define-public zlfo
+  (package
+    (name "zlfo")
+    (version "0.1.3")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://git.zrythm.org/git/ZLFO")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32
+         "0bm466ci5xyvxvq7l9p6xyh789lvk6i31b4zja1igqh13akbjnjz"))))
+    (build-system meson-build-system)
+    (inputs
+     `(("librsvg" ,librsvg)
+       ("lv2" ,lv2)
+       ("ztoolkit-rsvg" ,ztoolkit-rsvg)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
+    (synopsis "Low frequency oscillator plugin")
+    (description "ZLFO is a fully featured
+@dfn{low frequency oscillator} (LFO) for @dfn{control voltage} (CV)-based
+automation that comes as an LV2 plugin bundle with a custom UI.")
+    (home-page "https://git.zrythm.org/cgit/ZLFO/")
+    (license license:agpl3+)))