10 seconds each recording but you can hold WAY more recordings than on dsi. But the WAY more is sd card storage. System memory storage is same.
Yes, the system comes with Nintendo 3DS Sound, an improved version of Nintendo DSi Sound, already installed.
On the menu, you go to 3DS Sound, (the blue music note) and tap record sounds. Lot's of speech bubbles will appear on screen. Tap one, and hit the red button. It will start recording. You can also start recording by making a sound. Tap OK, and then you can edit your sound.
10 seconds just like the DSi
I think that it can record for 1 minute but there are some tricks which can record sound for more than that!
No, the DSi can only take pictures and record sound. The 3DS, however, is planned to be able to play 3D movies.
No, but there is 3DS sound which Plays music. all you need is a SD card with some MP3 Music, put the SD card in the 3DS. then go on 3DS sound then, you should be able to play your music.
yes
No, the cameras are only for taking still photos. The 3DS is planned to be able to record 3D video, however.
20 hours
Yes, the larger version of the 3DS, the 3DS XL, has long since been released.
http://www.ehow.com/how-does_4620483_vinyl-record-sound-compared-cd.html
No, but the feature is planned to be added in a future system update.