Imac G5 USB panel

SOURCE: Connecting Yamaha piano (YDP-131) to imac g5

I dont use garage band but You could try just plugging a regular plug jack from aux out to your computer with a smaller jack adapter into your mic input. When you go to record a track it should pick it up-the equalizer should show movement when striking keys. Remember most music software requires you to select the option to play and hear the sound simultaneously.

SOURCE: Replacing the hard drive on a imac G5 first generation

http://www.dtgeeks.com/index.php/features/tutorialview/imac_g5_hard_drive_replacement/
the above link wont let u keep on searching for u information but will directly get u the information on how to replace ur hard drive n wat type of hard drive will support ur machine.

feel free 4 further assistance .rate the particular experts solution as fixya that helps u understand n solve ur problem

SOURCE: External sound problems on Power Mac G5

Mac g5 sound output is echoing? what is the reason

SOURCE: iMac G5

If it isn't the power supply, some of the early G5 imacs had a capacitor failure issue...mine just died, in fact. It was just shutting off by itself, even turned on once by itself....but tonight, when it shut down, it would not restart. I opened it up and looked and sure enough, 11 bulging/leaking capacitors. My local service center says there are two options: 1. new mother board-aprox $500 or replacing the capacitors- between $170-200. Until Dec 15, 2008..this was apparently covered under a special warranty extension program Apple had....typical!

SOURCE: connecting external microphone to imac g5

Get yourself a great little gadget called iMic. It's a usb connector that adapts to let you used your headset mic and the mac system os will recognize it very well. Works good .
Costs about 24 bucks or so..
K