AcousticFootprints

ML Projects

1. David Cranor's Blinky Snare Drum.
2. Jay Silver's drawdio (see also fun pack).
3. Eric Rosenbaum's Melody Morph, MmmTsss, 2-week interactive music studio.
4. Jay and Eric's Singing Fingers.
5. Barry Kudrowitz's designerds (come on Barry!)

Acoustic Instruments

1. How to Make Musical Instruments for Kids (eHow).
2. 9 Easy to Make Musical Instruments for Kids (link)
3. Flute from PVC (link1 , link2, link3, link4, ...)
4. Mongolian Violin using Coconut (link)
5. Long list of projects (link)
6. Students' projects (link)

Electronic Instruments

1. Making a simple electric guitar (link)
2. Acoustic Guitar Pickup (link1, link2)

Mathematics (background)

1. Dense text but informative (link)
2. As above, again (link)
3. Hard core Sonantometry (link)
4. Musical temperament (link)
5. Pointers from a teacher with suggestions for grades 3-7 (link)
6. Fractions, Multiples, Beats and Measures (link)
7. Interesting visualizations -- musemath

About Sounds

1. Sound and Music Activities (link)
2. Acoustics Basics (link)
3. Lots of physics + info (link)
4. Timbre (info), see also this.

Sacred Music

1. 2010 festival (link, link2)

Music and Language

1. Chris Dobrian (1992)
2. Bill Hammel, (1997)

Harmony and Chords

1. How to Teach Music Harmony to Children (link)