Hi there, I’m building a simple midi based metronome and I’m wondering if anyone knows of a good sound generating circuit to give me a nice clicking sound. Something that could just be fed with a pulse from a DOUT and ouput at headphone level. Even better would be if I could have a higher pitched click for the start of each measure (could be fed from another DOUT). The midibox part is pretty much done and this is all I need to finish it off. 
Thanks!