Roland SVC-350 Vocoder

YouTube via AnalogSweden
"Roland SVC-350 Vocoder demonstration. http://www.analogsweden.com..."

Roland D-50 Demo - Famous Sounds

YouTube via derekaggs11
"I replaced my SQ-80 with a D-50 and it's incredible! Here's a demo running through some famous presets." Some Enya in there.

Roland R8-M Total Percussion Sound Module Factory Demo & 6 PCM Cards

YouTube via zibbybone
"Here are the ROM play demo songs for the R8-M and 6 of the PCM sound cards. All songs Copyright Roland Corporation. The PCM cards featured in this video are:
SN-R8-02 Jazz Brush
SN-R8-03 Sound Effects
SN-R8-04 Electronic (TR-808)
SN-R8-06 Ethnic Percussion
SN-R8-09 Power Drums U.S.A.
SN-R8-10 Dance (CR-78, TB-303 & TR-909)"

Soviet_Effect_px-1000_guitar.wmv

YouTube via mikeonop

Soviet_effect_px-100_drums.wmv

Vermona_PDD 501_Effect_guitar.wmv

YouTube via mikeonop

Korg EMX-1 / Da Zound Electronic Music

YouTube via djgalactic
"This a new home made pattern with the Electribe Korg EMX-1 Groove Box
Da Zound Electronic Music (Techno / House)
By DJ Galactic"

Pattern Music ループパターンで直感的に曲作り

YouTube via jetdaisuke
"http://webdog.be/archives/10205_02131...
ピアノロールシーケンサーを打ち込んでループを配置していくだけで曲ができるiPho neアプリ。かなり不思議な作曲体験を味わえます"
See this video for a tutorial. Remember, all iPhone apps will work on the iPad out of the box.

PatternMusic on iTunes:

funky blips

funky blips from J Stick on Vimeo.

"Don't even ask me to explain this patch. Everything in the rack, save for the mixer and ring mod. Sexy soundin', though."

Augmented Reality Drum Kit

Augmented Reality Drum Kit (demo #1) from squidder on Vimeo.

"More info at squidder.com/2009/03/03/augmented-reality-drum-kit/"

Augmented Reality Drum Kit (demo #2) from squidder on Vimeo.

Z8000 beep beep

Z8000 beep beep from Tiptop Audio on Vimeo.

"2 x Z3000, 1 x Z2040 , 1 x Z8000 and 1 x Z5000 playing sine waves"
http://tiptopaudio.com/