# Juce Demo Plugin Audio Unit makes no sound **URL:** \ **Category:** Audio Plugins\ **Created:** [May 20, 2015, 12:43pm UTC](https://forum.juce.com/t/juce-demo-plugin-audio-unit-makes-no-sound/14806 "2015-05-20T12:43:49Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![KNurk](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@KNurk](https://forum.juce.com/u/KNurk)\ **Post date:** [May 20, 2015, 12:43pm UTC](https://forum.juce.com/t/juce-demo-plugin-audio-unit-makes-no-sound/14806/1 "2015-05-20T12:43:49Z")
Hi, Sorry for the noobish question but I build the Juce Demo Plugin project with Xcode 6.3.2 and the VST works perfectly but the Audio Unit makes no sound when I press the keys. I placed the 'CoreAudio' folder from Feb 2012 in 'Xcode/Contents/Developer/Extras' folder. I'm guessing there is something wrong with using such an old resource with the new Xcode? I looked on Apple's Developer site and downloaded 'audiotools\_for\_xcode\_6.1' but it just has some 'AU Lab' and 'HALLab' so I don't think that's what I need. Can anybody help me? K   ---
**Author:** ![KNurk](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@KNurk](https://forum.juce.com/u/KNurk)\ **Post date:** [May 20, 2015, 4:10pm UTC](https://forum.juce.com/t/juce-demo-plugin-audio-unit-makes-no-sound/14806/2 "2015-05-20T16:10:45Z")
https://developer.apple.com/library/mac/samplecode/CoreAudioUtilityClasses/Introduction/Intro.html  solves the problem ---
**Author:** ![timur](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/timur/32/541_2.png) [@timur](https://forum.juce.com/u/timur)\ **Post date:** [May 22, 2015, 8:03am UTC](https://forum.juce.com/t/juce-demo-plugin-audio-unit-makes-no-sound/14806/3 "2015-05-22T08:03:41Z")
...and here is a working link: https://developer.apple.com/library/ios/samplecode/CoreAudioUtilityClasses/Introduction/Intro.html