The zip does work with TWRP on my HTC One (M7). Sorry, family time.
Edit: Just to make sure it was not a fluke, I deleted all sound from the L package I installed. Reboot device as to clear the package completely. Re-downloaded the first link. Booted into recovery. Installed zip (worked just fine). Install went as planned. Wiped cache/dalvik. Rebooted device. Have all the L sounds and sounds from KitKat installed.
Should the information I provided helped in any small way and you would like to thank me:
1. Hit the thanks button and/or
2. Install dropbox using this ---> Dropbox
Thank you for allowing me to assist you.