gnu: Add ldacbt.

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

gnu/packages/audio.scm

@@ -3965,6 +3965,27 @@ (define-public python-pyalsaaudio
 (define-public python2-pyalsaaudio
   (package-with-python2 python-pyalsaaudio))
 
+(define-public ldacbt
+  (package
+    (name "ldacbt")
+    (version "2.0.2.3")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://github.com/EHfive/ldacBT"
+                                  "/releases/download/v" version
+                                  "/ldacBT-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1d65dms4klzql29abi15i90f41h523kl6mxrz9hi6p5vg37fxn2b"))))
+    (build-system cmake-build-system)
+    (arguments `(#:tests? #f)) ; no check target
+    (home-page "https://github.com/EHfive/ldacBT/")
+    (synopsis "LDAC Bluetooth encoder and ABR library")
+    (description "This package provides an encoder for the LDAC
+high-resolution Bluetooth audio streaming codec for streaming at up to 990
+kbps at 24 bit/96 kHz.")
+    (license license:asl2.0)))
+
 (define-public bluez-alsa
   (package
     (name "bluez-alsa")