Magnetic Resonator Piano

See also:

• http://www.youtube.com/watch?v=f79d_oVqv4Y

How the Iconic iPhone "Boo-Dah-Ling" Sound Was Designed

http://jacklinstudios.com/docs/making-of-158-marimba.html

Digi Instruments

http://www.reddit.com/user/diydsp/m/digi_instruments

Pushpin MIDI Interface for Game Boy Color and Game Boy Advance

This project from Brian Whitman and I has been running for many years!
It is very exciting to see that there is still interest in it.
For those curious, I have gathered up a number of important links that show different ways you can build and use this interface to turn a GBC or GBA into a MIDI-controlled music instrument. 

http://diydsp.com/livesite/pages/Pushpin_MIDI

Example song:  "The Matrix"

AMZ-FX Guitar Effects Blog

This looks like nice site with LOTS of updates:

http://www.muzique.com/news/

It's a got few real gems and also lots of analog guitar pedal effects and circuits that accompany them...  A great place to pick up steam learning about various example audio circuits!

Guitars with Built-In Speakers

• http://otonanokagaku.net/english/manuals/pdf/vol26_eguitar.pdf
• http://answers.yahoo.com/question/index?qid=20091202143234AAliNpT
• http://www.instrumentalley.com/Indiana-Runt-Mini-Electric-Guitar-Speaker-p/imes.htm
• http://www.kaboodle.com/reviews/electric-guitar-with-built-in-amplifier-speaker--blue
• http://tpj-instrument.en.alibaba.com/product/390155041-212142204/ACOUSTIC_GUITAR_BUILT_IN_SPEAKER.html
• http://www.dominicsmusic.com/strings/guitars/736/new-huntington-kids-electric-guitar-with-built-in-speaker-color-blue-model--ge30-ast-bu
• http://www.likecool.com/Pratesi_Guitar_Backpack--Bag--Style.html
• http://ask.metafilter.com/78798/portable-guitar-with-builtin-ampspeaker
• http://www.amazon.com/Electric-Guitar-with-Built-in-Speaker/dp/B001DRIDMG
• http://www.ronsusser.com/inventory.htm?id=553
• http://www.zzounds.com/productreview--SQU0300105
• http://www.maplin.co.uk/herald-red-electric-guitar-kit-with-built-in-speaker-528766
• http://www.overstock.com/Gifts-Flowers/First-Act-Built-in-Speaker-Electric-Guitar/5486437/product.html
• http://www.diyaudio.com/forums/instruments-amps/200885-guitar-built-amp-speaker.html
• http://www.8notes.com/gear/SQU0300105.asp
• http://www.instructables.com/id/Guitar-Hero-Guitar-with-Built-in-Speaker/
• 
  

Euro Instruments

European DIY Music Instruments!

In Germany, the word for DIY Music Instruments is "Selbstgebaute Musikinstrumente"

Translation of a Comment is not so appreciative!!!

 This video originates from Spain.  Youtube is not known for its generous comments, but one writer has this to say:

"Die klingen ja wie scheiße haha aber top viedeo danke für's posten."

Zemkodo

• https://www.youtube.com/watch?v=7W-XO9x9XGw

 Polichord