My BeatsMy BeatsKaren TippingDylan BarrettMike Smith

Overview

Goal: To dynamically create tracks for guitar hero using any song as input.

Terminology for our project Song Track Button Segment

Technology

Frets on Fire (FoF) Analyze by The Echo Nest Java

Timeline: Sept. 17 – Oct. 1

Mike: Create functions to gather data from Analyze, which outputs an XML description file Uses description to create list of song notes

Dylan: Reverse engineer the MIDI file format used by Frets on Fire Generate our own FoF tracks

Karen: Convert MP3 to OGG Embed conversion within Java tool

Using Analyze's XML File

Parse XML to: Locate song segments

Each segment corresponds to a note Find common song structures

Create Musical Data Structure Linked List

Sequential nodes define note progression

Segment XML File<?xml version="1.0" encoding="UTF-8"?><response version="2"> <status> <code>0</code> <message>Success</message> </status> <thingID>TRLFPPE11C3F10749F</thingID> <method>segmentslt;/method> <analysis> <segment start="2.54562" duration="0.29587"> <loudness> <dB time="0">-29.707</dB> <dB type="max" time="0.03483">-25.351</dB> </loudness> <pitches> <pitch>0.009</pitch> <pitch>0.090</pitch> <pitch>0.010</pitch> <pitch>0.018</pitch> <pitch>1.000</pitch> <pitch>0.017</pitch> <pitch>0.005</pitch> <pitch>0.005</pitch> <pitch>0.028</pitch> <pitch>0.383</pitch> <pitch>0.010</pitch> <pitch>0.016</pitch> </pitches>

<timbre> <coeff>31.132</coeff> <coeff>-51.574</coeff> <coeff>92.135</coeff> <coeff>60.049</coeff> <coeff>77.614</coeff> <coeff>-17.629</coeff> <coeff>-47.819</coeff> <coeff>6.888</coeff> <coeff>17.400</coeff> <coeff>-0.635</coeff> <coeff>-8.109</coeff> <coeff>-45.552</coeff> </timbre> </segment> </analysis></response>

Example

MIDI Format in Frets on Fire

SuperEasy

Easy

Medium

Hard

60 61 62 63 64

72 73 74 75 76

84 85 86 87 88

96 97 98 99 100

Timeline: Oct. 1 – Oct. 8

Dylan, Karen, Mike: Integration Generate preliminary simple test track

Each song note mapped to a single button Timing test

Timeline: Oct. 8 – Oct. 22

Two weeks Karen: Mapping notes to buttons

Different for each song

Mike: Build a Suffix Tree Way to identify common sequences

SuperEasy, Easy, Medium, and Hard Easy Difficulty

Common repetitive structures Low frequency of notes

Harder Difficulties Includes more notes and less common structures Building on what's already in the lower difficulties

Timeline: Oct. 22 – Nov. 12

All of us: Making better tracks you'd like to play Heuristics remove notes from song for track

Note frequency, and concurrency Remove more for easier difficulties

Curve Sampling

Mathematical Curve Sampling

Determines which notes are needed to get across the same basic musical structure

Timeline: Nov. 12 – End of Semester

Karen, Mike, Dylan: Final integration Play our dynamically created tracks on FoF Tweak heuristics Fix bugs

Questions?Questions?