[zwily]

Heh, me too - you can turn it back on in System Preferences though. It's a new sound effect.

[dandruffhead]

Do you know exactly where? I couldn't find it.

[roryokane]

I don’t have Yosemite, but in Mavericks, you can change it in System Preferences > Sound > Sound Effects, by checking the checkbox “Play feedback when volume is changed”.