Why do I have no sound on the new Garageband?

Question

I have no audio coming from Garageband 10.0.2. Downloaded it on Saturday and have spent the last two days trying to figure out why it won't work. I'm using a macbook pro with an Alesis QX49. GB registers keyboard when I plug it in but no sound whatsoever, not even from the onscreen keyboard. It seems to read the keyboard as if I play a C chord, it appears in the display. I've done all the obvious stuff like check preferences, restart, I've deleted and downloaded new GB several times and always with same result. Actually, it took me about four attempts to download it in the first place as I was getting an internet connection error message right at the end of the download, and I see others have had that problem. Managed to solve that by downloading in safe mode but now the no sound thing is driving me absolutely crazy because I can't play my keyboard!!!!! Also, worth noting that there is no audio level being read anywhere, I believe in the new version this appears in the volume control at the top. I've also looked into it potentially being a problem with my keyboard and it possibly needing an update but can't find any difinitive answer for that anywhere. I've stopped looking into that because the on screen keyboard doesn't even work - if that worked then I would know at least GB works and it's something to do with the keyboard. So, I am at a complete loss. If anyone has any ideas about why this is happening or what I could do to solve then I would be very grateful.

Answer 1

I can delete tracks but I can't add them. Nothing changes when I delete the tracks.
That looks like your project were corrupted, Chris.  What happens, when you create a new project  with "File > New"?
I also can't open previous projects, I get the error message:
The project "Discovery Final copy" cannot be used because it was not prepared with an iLife preview. Would you like to open "Discovery Final copy" in GarageBand so you can save it with an iLife preview?
You are trying to open the previous projects from the Media Browser, right? That will only work, if these projects have been saved with an iLife Preview, using the "Share > Media Browser" command.
Can you open the previous projects from the "File" menu in GarageBand? File > Open recent?
It's looking more and more like it hasn't downloaded properly or fully but I have deleted and downloaded again several times with same result. It might be worth trying again unless there is anything else to try?
Something is certainly wrong - either the current project, some settings in your user account, or the downloaded GarageBand version. Or incompatible software may be interfering.
If a new project does not work, try to test by logging into a different user account, for example the "Guest User" account. Create a new project using this account. Does GarageBand work better from this account?  Then we will need to troubleshoot your preferences.