I need to delete all the tracks from Voice Memos in order to free up memory on my device. Deleting tracks one at a time is not an option since I have hundreds of them. I am using an iPod touch 4G.
Open the app and you'll find a little symbol with 3 horizontal stripes in the right bottom corner. You'll get a list and you can tap the memo and click "delete" right afterwards.
Or in iTunes you can select all voice memo's after you've synced them to your PC and delete them from there.