A trill, generally three very fast notes on repique/caixa, two or three for surdos Add schematic, start on PCB sandwich, making some final-ish decisions about connecting to front panel and Pin 1, vertical PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc3fbv1-da B Series, 4 pole chassis connector, grey D-size flange, mirrored self tapping screw holes (A-screw), https://www.neutrik.com/en/product/nlt4md-v THT Mini XLR 5Pin right angle http://www.alps.com/prod/info/E/HTML/Tact/SnapIn/SKHH/SKHHLUA010.html tactile switch with 12 positions D 3 pin Molex header 2.54 mm spacing"/>
Used. C1 is too small.