diff --git a/soundfile.py b/soundfile.py
index 8e0b90f..d1eed6f 100644
--- a/soundfile.py
+++ b/soundfile.py
@@ -31,6 +31,7 @@
 
 enum
 {
+    SFC_GET_LOG_INFO                = 0x1001,
     SFC_GET_FORMAT_INFO             = 0x1028,
 
     SFC_GET_FORMAT_MAJOR_COUNT      = 0x1030,
@@ -691,6 +692,14 @@ def __init__(self, file, mode='r', samplerate=None, channels=None,
     _errorcode = property(lambda self: _snd.sf_error(self._file))
     """A pending sndfile error code."""
 
+    @property
+    def extra_info(self):
+        """Retrieve the log string generated when opening the file."""
+        info = _ffi.new("char[]", 2**14)
+        _snd.sf_command(self._file, _snd.SFC_GET_LOG_INFO,
+                        info, _ffi.sizeof(info))
+        return _ffi.string(info).decode()
+
     # avoid confusion if something goes wrong before assigning self._file:
     _file = None
 
diff --git a/tests/test_pysoundfile.py b/tests/test_pysoundfile.py
index 81a40c1..4d7636e 100644
--- a/tests/test_pysoundfile.py
+++ b/tests/test_pysoundfile.py
@@ -584,6 +584,10 @@ def test__repr__(sf_stereo_r):
                                  "endian='FILE')").format(sf_stereo_r)
 
 
+def test_extra_info(sf_stereo_r):
+    assert 'WAVE_FORMAT_IEEE_FLOAT' in sf_stereo_r.extra_info
+
+
 def test_mode_should_be_in_write_mode(sf_stereo_w):
     assert sf_stereo_w.mode == 'w'
     assert len(sf_stereo_w) == 0