Moving on, I then added a band-pass filter, finding that a centre frequency of 2.64kHz worked well. The 12dB-per-octave option sounded a bit flabby, while the 24dB-per-octave cutoff shaped the sound too severely, limiting it to too narrow a band of frequencies, so I chose the 12dB-per-octave option and added a little resonance to accentuate the partials close to the centre frequency. This worked well, so I then passed the signal to an output amplifier, and added a clock generator to trigger the contour generator. Next, I sat back to enjoy my handiwork.