A pencil writing on some cardboard. Makes a good scratching sound for something like note taking or plain writing. It's semi-erratic with a couple pauses in between and i took different distances from the mic and angles with the pencil to try and get different sounds.
An edited version of my upload uke_single_notes. Wav. I shortened that recording to its last four notes, then included a fade out to eliminate most of the non-ukelele sound at the end. This recording has notes as follows: g4 g4 a4 d4. This sound was originally created for the coursera course "audio signal processing for music applications. " i recorded this sound myself with a zoom h2 microphone and a kala classical ukelele.