Heroku error when deploying Rails app - ruby-on-rails-3

Question

I need help with the following error. I'm trying to deploy Rails 4 app on Heroku..
It seems like gems can't be installed. Whan can I do about it?
I've tried to solve this using some "googling" solutions but nothing seems to work. And yes I have put sqlite and postgresql in the right group in gemfile (production/developement).
Any thoughts?
Here is the bash procedure when deploying:
Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
Fetching gem metadata from https://rubygems.org/..........
Fetching additional metadata from https://rubygems.org/..
Installing i18n (0.6.9)
Installing multi_json (1.9.2)
Installing minitest (4.7.5)
Installing rake (10.3.1)
Installing builder (3.1.4)
Installing thread_safe (0.3.3)
Installing erubis (2.7.0)
Installing tzinfo (0.3.39)
Installing mime-types (1.25.1)
Installing rack (1.5.2)
Installing polyglot (0.3.4)
Installing activerecord-deprecated_finders (1.0.3)
Installing arel (4.0.2)
Installing coffee-script-source (1.7.0)
Installing execjs (2.0.2)
Installing chunky_png (1.3.1)
Installing thor (0.19.1)
Installing commonjs (0.2.7)
Installing orm_adapter (0.5.0)
Installing hike (1.2.3)
Installing bcrypt (3.1.7)
Installing json (1.8.1)
Using bundler (1.5.2)
Installing libv8 (3.16.14.3)
Installing tilt (1.4.1)
Installing rails_serve_static_assets (0.0.2)
Installing rails_stdout_logging (0.0.3)
Installing ref (1.0.5)
Installing sass (3.2.19)
Installing activesupport (4.0.2)
Installing rack-test (0.6.2)
Installing warden (1.2.3)
Installing treetop (1.4.15)
Installing coffee-script (2.2.0)
Installing rdoc (4.1.1)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/tmp/build_55f006e8-de4b-4dcc-9c81-39f56d6f8f04/vendor/ruby-2.0.0/bin/ruby extconf.rb
checking for sndfile.h in /opt/local/include,/usr/local/include,C:/Program Files (x86)/Mega-Nerd/libsndfile/include,C:/Program Files/Mega-Nerd/libsndfile/include... no
checking for sf_open() in -lsndfile-1... no
checking for sf_open() in -lsndfile... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/tmp/build_55f006e8-de4b-4dcc-9c81-39f56d6f8f04/vendor/ruby-2.0.0/bin/ruby
--with-sndfile-dir
--without-sndfile-dir
--with-sndfile-include
--without-sndfile-include=${sndfile-dir}/include
--with-sndfile-lib
--without-sndfile-lib=${sndfile-dir}/
--with-sndfile-1lib
--without-sndfile-1lib
--with-sndfilelib
--without-sndfilelib
extconf.rb:21:in `<main>': Can't find libsndfile (http://www.mega-nerd.com/libsndfile/) (RuntimeError)
Try passing --with-sndfile-dir or --with-sndfile-lib and --with-sndfile-include
options to extconf. If there are spaces in the path on windows, it may not work.
Gem files will remain installed in /tmp/build_55f006e8-de4b-4dcc-9c81-39f56d6f8f04/vendor/bundle/ruby/2.0.0/gems/ruby-audio-1.6.1 for inspection.
Results logged to /tmp/build_55f006e8-de4b-4dcc-9c81-39f56d6f8f04/vendor/bundle/ruby/2.0.0/gems/ruby-audio-1.6.1/ext/rubyaudio_ext/gem_make.out
Installing uglifier (2.5.0)
Installing less (2.5.0)
Installing pg (0.17.1)
An error occurred while installing ruby-audio (1.6.1), and Bundler cannot
continue.
Make sure that `gem install ruby-audio -v '1.6.1'` succeeds before bundling.
Bundler Output: Fetching gem metadata from https://rubygems.org/..........
Fetching additional metadata from https://rubygems.org/..
Installing i18n (0.6.9)
Installing multi_json (1.9.2)
Installing minitest (4.7.5)
Installing rake (10.3.1)
Installing builder (3.1.4)
Installing thread_safe (0.3.3)
Installing erubis (2.7.0)
Installing tzinfo (0.3.39)
Installing mime-types (1.25.1)
Installing rack (1.5.2)
Installing polyglot (0.3.4)
Installing activerecord-deprecated_finders (1.0.3)
Installing arel (4.0.2)
Installing coffee-script-source (1.7.0)
Installing execjs (2.0.2)
Installing chunky_png (1.3.1)
Installing thor (0.19.1)
Installing commonjs (0.2.7)
Installing orm_adapter (0.5.0)
Installing hike (1.2.3)
Installing bcrypt (3.1.7)
Installing json (1.8.1)
Using bundler (1.5.2)
Installing libv8 (3.16.14.3)
Installing tilt (1.4.1)
Installing rails_serve_static_assets (0.0.2)
Installing rails_stdout_logging (0.0.3)
Installing ref (1.0.5)
Installing sass (3.2.19)
Installing activesupport (4.0.2)
Installing rack-test (0.6.2)
Installing warden (1.2.3)
Installing treetop (1.4.15)
Installing coffee-script (2.2.0)
Installing rdoc (4.1.1)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/tmp/build_55f006e8-de4b-4dcc-9c81-39f56d6f8f04/vendor/ruby-2.0.0/bin/ruby extconf.rb
checking for sndfile.h in /opt/local/include,/usr/local/include,C:/Program Files (x86)/Mega-Nerd/libsndfile/include,C:/Program Files/Mega-Nerd/libsndfile/include... no
checking for sf_open() in -lsndfile-1... no
checking for sf_open() in -lsndfile... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/tmp/build_55f006e8-de4b-4dcc-9c81-39f56d6f8f04/vendor/ruby-2.0.0/bin/ruby
--with-sndfile-dir
--without-sndfile-dir
--with-sndfile-include
--without-sndfile-include=${sndfile-dir}/include
--with-sndfile-lib
--without-sndfile-lib=${sndfile-dir}/
--with-sndfile-1lib
--without-sndfile-1lib
--with-sndfilelib
--without-sndfilelib
extconf.rb:21:in `<main>': Can't find libsndfile (http://www.mega-nerd.com/libsndfile/) (RuntimeError)
Try passing --with-sndfile-dir or --with-sndfile-lib and --with-sndfile-include
options to extconf. If there are spaces in the path on windows, it may not work.
Gem files will remain installed in /tmp/build_55f006e8-de4b-4dcc-9c81-39f56d6f8f04/vendor/bundle/ruby/2.0.0/gems/ruby-audio-1.6.1 for inspection.
Results logged to /tmp/build_55f006e8-de4b-4dcc-9c81-39f56d6f8f04/vendor/bundle/ruby/2.0.0/gems/ruby-audio-1.6.1/ext/rubyaudio_ext/gem_make.out
Installing uglifier (2.5.0)
Installing less (2.5.0)
Installing pg (0.17.1)
An error occurred while installing ruby-audio (1.6.1), and Bundler cannot
continue.
Make sure that `gem install ruby-audio -v '1.6.1'` succeeds before bundling.
Failed to install gems via Bundler.
Push rejected, failed to compile Ruby app
To git#heroku.com:quiet-waters-5319.git
[remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git#heroku.com:quiet-waters-5319.git'

Answer 1

seems heroku isn't able to build the native parts of required ruby-audio. After a quick search on "ruby-audio heroku" I found this: https://github.com/khurramzaman/ruby-audio-heroku