gnu: Add gnaural.

* gnu/packages/audio.scm (gnaural): New variable.

gnu/packages/audio.scm

@@ -21,6 +21,7 @@
 ;;; Copyright © 2019 Pierre Langlois <pierre.langlois@gmx.com>
 ;;; Copyright © 2019 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2019 Rutger Helling <rhelling@mykolab.com>
+;;; Copyright © 2019 Arun Isaac <arunisaac@systemreboot.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -3721,3 +3722,32 @@ library.")
     (description "FAudio is an XAudio reimplementation that focuses solely on
 developing fully accurate DirectX Audio runtime libraries.")
     (license license:zlib)))
+
+(define-public gnaural
+  (package
+    (name "gnaural")
+    (version "20110606")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "mirror://sourceforge/gnaural/Gnaural/gnaural_"
+                           version ".tar.xz"))
+       (sha256
+        (base32
+         "1gq519c0imsh57zklyi0f8h64l3ai48lh672c834470z8c6kvbfi"))))
+    (build-system gnu-build-system)
+    (inputs
+     `(("alsa-lib" ,alsa-lib)
+       ("gtk+" ,gtk+-2)
+       ("libsndfile" ,libsndfile)
+       ("portaudio" ,portaudio)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
+    (home-page "http://gnaural.sourceforge.net/")
+    (synopsis "Binaural beat synthesizer")
+    (description "Gnaural is a programmable auditory binaural beat synthesizer
+intended to be used for brainwave entrainment.  Gnaural supports creation of
+binaural beat tracks of different frequencies and exporting of tracks into
+different audio formats.  Gnaural can also be linked over the internet with
+other Gnaural instances, allowing synchronous sessions between many users.")
+    (license license:gpl2+)))