Lucas Garron
http://music.garron.us/hacks/

Various scripts used for dance hacking at Stanford using the Echonest Remix API

• wz - Automatically calls analyze and tries the most common waltzifications with waltz_blender.
• analyze - Uploads a song to Echonest and downloads a `.json file with the analysis.
• waltz_blender - Blends beats. By default, turns 4/4 songs into waltzes.
• wz-beatcaster - Reasonably clean way to recast beats by modifying their tempo.
• inception - Make everything into a mind heist.
• yt-wz - One step from YouTube to waltz.

For some of this to work, the scrips have to be in the path, e.g. waltz_blender.py as waltz_blender.

(Paste into cygwin is Shift-Insert.)

• Install cygwin
  • Select the following packages: python, curl, zip, openssl
• Install CA Certificates the "Right" Way (section below)
• Quick Install (section below)
• Try one of the examples (section below)

• Optional: Download and install the Echonest Remix API
• Open Terminal and copy: cd /Applications
• Quick Install (section below)
• Try one of the examples (section below)

• Install curl and ffmpeg (requires password): sudo apt-get install curl ffmpeg
• Quick Install (section below)
• Try one of the examples (section below)

NOTE: This works for me in Ubuntu, but the output audio appears to be differently shifted. So, it "works", but maybe not quite as advertised.

Please register and get an Echonest API Key. (If you just want to try it, this install will work because I'm nice and I'm providing a default API key, but you should get your own.)

curl -L "https://github.com/lgarron/dance-hacking/zipball/master" -o "dance-hacking.zip" &&
unzip "dance-hacking.zip" &&
mv $(ls . | grep "lgarron-dance-hacking") dance-hacking &&
cd dance-hacking &&
./setup.sh &&
. "${HOME}/.bash_profile"

Waltzify an instrumental version of Adele's "Someone Like You" (30MB download, will produce 260MB of files, creates a folder in your "Dance Hacking" folder):

yt-wz http://www.youtube.com/watch?v=L0jbjnqHFCU

Waltzify "Code Name Vivaldi" by ThePianoGuys (136MB download, will produce 340MB of files, creates a folder in your "Dance Hacking" folder):

yt-wz http://www.youtube.com/watch?v=09RUuTAM2H0

Waltzify a file on your hard drive (creates a JSON analysis file and folder in the same directory as the file):

cd path/to/folder/containing/your/file
wz "file-name.mp3" # Can also be any other audio/video format.

Or simply:

cd "path/to/file-name.mp3" # Can ususally be dragged and dropped onto your Terminal window.

Waltzify with a different beat pattern (this example is good for creating a redowa with downbeats 1 and 3 moved to 1 and 2):

cd path/to/folder/containing/your/file
analyze "file-name.mp3"
wz "file-name.mp3" "file-name.mp3.json" "[12]34"

Convert a waltz to 5/4 time:

cd path/to/folder/containing/your/file
analyze "file-name.mp3"
wz "file-name.mp3" "file-name.mp3.json" "1234[56]"

Waltzify by speeding up beats instead of blending (requires the Echonest Remix API to be installed correctly):

cd path/to/folder/containing/your/file
your Terminal window.
wz-beatcaster "file-name.mp3"

Advanced waltz_blender use:

cd path/to/folder/containing/your/file
analyze file-name.mp3
wavify file-name.mp3
waltz_blender file-name.mp3.wav file-name.mp3.json "1[24][52][36]" 50 0 6

if [ -z "$(curl-config --ca)" ] 
then
    echo "No location for curl certificate."
else
    if [ -f "$(curl-config --ca)" ]
    then
        echo "curl certificate already exists."
    else
        curl http://curl.haxx.se/ca/cacert.pem -o "$(curl-config --ca)"
    fi
fi

Place a file containing "insecure" at ~/.curlrc.

Note that this will avoid checking for certificates for all cURL downloads in the future, without warning. Probably, nothing bad will happen. Theoretically, very bad things could happen.

Neither is mine. I'm gonna assume you know what you're doing. :-P
(If your default shell is something like tcsh, then... happy hacking? :-)

• ffmpeg
• Python
• cURL
• youtube-dl (included)

• Echonest Remix API
• lame (allows for slightly better-quality .mp3 files due to VBR.)
• grep, zip/unzip (for more automated setup)
• OpenSSL (CA certs?)

• git (for keeping the repo up to date... if you know what you're doing)

• OSX (Mountain Lion)
• Windows XP (cygwin)
• Linux (Ubuntu)
• iPad (using custom install)

• bpm-tap fo manual beat data.
• Allow lower-quality youtube-dl downloads.
• Allow for easy use of tatums instead of beats.
• Integrate better with actual Echonest Remix API.