diff --git a/Doxyfile b/Doxyfile
index ddcc405..2510ab2 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -31,7 +31,7 @@ PROJECT_NAME           = "Rubber Band Library"
 # This could be handy for archiving the generated documentation or 
 # if some version control system is used.
 
-PROJECT_NUMBER         = 1.8.2
+PROJECT_NUMBER         = 1.9.0
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
 # base path where the generated documentation will be put. 
diff --git a/Makefile.in b/Makefile.in
index 7c53abe..fdddb72 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -34,7 +34,7 @@ JNINAME			:= librubberband-jni
 JARNAME			:= rubberband.jar
 
 DYNAMIC_EXTENSION	:= .so
-DYNAMIC_FULL_VERSION	:= 2.1.1
+DYNAMIC_FULL_VERSION	:= 2.1.2
 DYNAMIC_ABI_VERSION	:= 2
 DYNAMIC_LDFLAGS		:= -shared -Wl,-Bsymbolic -Wl,-soname=$(LIBNAME)$(DYNAMIC_EXTENSION).$(DYNAMIC_ABI_VERSION)
 VAMP_LDFLAGS		:= -shared -Wl,-Bsymbolic -Wl,--version-script=vamp/vamp-plugin.map
diff --git a/Makefile.osx b/Makefile.osx
index 62fea2f..642533f 100644
--- a/Makefile.osx
+++ b/Makefile.osx
@@ -29,7 +29,7 @@ INSTALL_PKGDIR		:= $(PREFIX)/lib/pkgconfig
 LIBNAME			:= librubberband
 
 DYNAMIC_EXTENSION	:= .dylib
-DYNAMIC_FULL_VERSION	:= 2.1.1
+DYNAMIC_FULL_VERSION	:= 2.1.2
 DYNAMIC_ABI_VERSION	:= 2
 DYNAMIC_LDFLAGS		:= -dynamiclib -install_name $(INSTALL_LIBDIR)/$(LIBNAME).$(DYNAMIC_ABI_VERSION)$(DYNAMIC_EXTENSION) -current_version $(DYNAMIC_FULL_VERSION) -compatibility_version $(DYNAMIC_ABI_VERSION)
 
diff --git a/configure b/configure
index 2b3c12c..cf80b90 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for RubberBand 1.8.2.
+# Generated by GNU Autoconf 2.69 for RubberBand 1.9.0.
 #
 # Report bugs to <chris.cannam@breakfastquay.com>.
 #
@@ -580,8 +580,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='RubberBand'
 PACKAGE_TARNAME='rubberband'
-PACKAGE_VERSION='1.8.2'
-PACKAGE_STRING='RubberBand 1.8.2'
+PACKAGE_VERSION='1.9.0'
+PACKAGE_STRING='RubberBand 1.9.0'
 PACKAGE_BUGREPORT='chris.cannam@breakfastquay.com'
 PACKAGE_URL=''
 
@@ -1259,7 +1259,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures RubberBand 1.8.2 to adapt to many kinds of systems.
+\`configure' configures RubberBand 1.9.0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1320,7 +1320,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of RubberBand 1.8.2:";;
+     short | recursive ) echo "Configuration of RubberBand 1.9.0:";;
    esac
   cat <<\_ACEOF
 
@@ -1425,7 +1425,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-RubberBand configure 1.8.2
+RubberBand configure 1.9.0
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1719,7 +1719,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by RubberBand $as_me 1.8.2, which was
+It was created by RubberBand $as_me 1.9.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -4860,7 +4860,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by RubberBand $as_me 1.8.2, which was
+This file was extended by RubberBand $as_me 1.9.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -4913,7 +4913,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-RubberBand config.status 1.8.2
+RubberBand config.status 1.9.0
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 86ee632..a3a7fdd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 
-AC_INIT(RubberBand, 1.8.2, chris.cannam@breakfastquay.com)
+AC_INIT(RubberBand, 1.9.0, chris.cannam@breakfastquay.com)
 
 AC_ARG_ENABLE(programs,
   [  --disable-programs      disable compilation of programs],
diff --git a/rubberband/RubberBandStretcher.h b/rubberband/RubberBandStretcher.h
index f388f85..97b5e4a 100644
--- a/rubberband/RubberBandStretcher.h
+++ b/rubberband/RubberBandStretcher.h
@@ -24,9 +24,9 @@
 #ifndef _RUBBERBANDSTRETCHER_H_
 #define _RUBBERBANDSTRETCHER_H_
     
-#define RUBBERBAND_VERSION "1.8.2"
+#define RUBBERBAND_VERSION "1.9.0"
 #define RUBBERBAND_API_MAJOR_VERSION 2
-#define RUBBERBAND_API_MINOR_VERSION 5
+#define RUBBERBAND_API_MINOR_VERSION 6
 
 #include <vector>
 #include <map>
diff --git a/rubberband/rubberband-c.h b/rubberband/rubberband-c.h
index 11de77c..9b3b990 100644
--- a/rubberband/rubberband-c.h
+++ b/rubberband/rubberband-c.h
@@ -28,9 +28,9 @@
 extern "C" {
 #endif
 
-#define RUBBERBAND_VERSION "1.8.2"
+#define RUBBERBAND_VERSION "1.9.0"
 #define RUBBERBAND_API_MAJOR_VERSION 2
-#define RUBBERBAND_API_MINOR_VERSION 5
+#define RUBBERBAND_API_MINOR_VERSION 6
 
 /**
  * This is a C-linkage interface to the Rubber Band time stretcher.