from release notes for 6.0 "The libsamplerate based resamplers are now
deprecated, because they offer no particular advantage over speex"
meaning they were not enabled since then
BuildRequires: libasyncns-devel >= 0.1
BuildRequires: libcap-devel
BuildRequires: libltdl-devel >= 2:2.4
-BuildRequires: libsamplerate-devel >= 0.1.0
BuildRequires: libsndfile-devel >= 1.0.20
BuildRequires: libtool >= 2:2.4
BuildRequires: libwrap-devel
Requires: json-c >= 0.11
Requires: libasyncns >= 0.1
Requires: libltdl >= 2:2.4
-Requires: libsamplerate >= 0.1.0
Requires: libsndfile >= 1.0.20
Requires: libxcb >= 1.6
Requires: orc >= 0.4.11