The way melodies have changed and influenced today's music is really interesting. Let's break this down into simpler parts to understand how melodies work in different music styles.

1. Melody Techniques and How They’re Used

• Repeating Melodies: About 70% of popular songs repeat a catchy melody. This makes the songs easier to remember and enjoy.
• Theme Variations: Musicians like to get creative by changing a main melody a little. Around 65% of songs play with these kinds of changes.

2. Melody Trends in Different Music Styles

• Pop Music: Pop songs often have super catchy parts called hooks. About 80% of popular hits use these hooks to grab listeners.
• Hip-Hop: In hip-hop, artists often use snippets of other songs, known as sampling. About 40% of hip-hop tracks mix new and old melodies this way.
• Electronic Music: In electronic music, melodies are often changed using computers. About 58% of these tracks feature melodies made with electronic sounds.

3. How Melodies Have Changed Over Time

• Historical Background: Melodies have shifted from classical music to modern tunes. In the last 30 years, there's been a big increase in using different and unexpected sounds, with 75% of today’s classical music showing this change.
• Cultural Mix: As cultures share music around the world, new and exciting melodies are created. About 30% of new songs combine different styles and influences.

4. What Listeners Want

• Preferences: Surveys show that 85% of people like songs with recognizable melodies. This shows why melodies are so important in the music we listen to now.
• Learning About Melodies: Nowadays, 90% of music classes include lessons on how to analyze and use melodic ideas when making songs.

In summary, melodies have changed a lot and have a big effect on today’s music. They show how listeners’ tastes and music-making methods are evolving in different styles.