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1. #Converting multiple piezo pickups to one input software#
2. #Converting multiple piezo pickups to one input free#

This is the problem that I am having with reading circuit diagrams - figuring out what it actually means in application. Is this correct? Or should it be connected to ground? Or should it touch both of them somehow? the one going to the tip on a TRS connector. I even tried higher and lower resistor values without much effect.Īm I overlooking something? Am I connecting these to the right place? I put the resistor and capacitor in line on the "live" wire of a mono audio signal coming from the piezo - i.e. I tried several configurations with the capacitor first (high pass) and the resistor first (low pass), but none of them really seem to change the results significantly on the spectrum analyzer when I hit the drum pad. I have a huge bag of resistors and I tried wiring some 22k's up with the. 01uF cap and a 22k resistor, my cutoff point will be 723hz. Which I understand to mean that if I use a. Then in changing the resistor values, F0 gets to 723hz with a 22000 ohm resistor. On the site, I made the top frequency 680hz since that is the closest to 700 I can select. 01uF capacitors, which converts to 10nF to use on the site. The site mentioned above has a calculator which helps you calculate what resistor/cap values you will need for a specific frequency. So my idea was to make my frequency cutoff point at 700hz for each highpass/lowpass pair. The loudest or "primary" frequency they produce is around 700hz.

I have hooked the drum pads up to a spectrum analyzer. I think I understand it pretty much, but in testing it today, it didn't seem to work as expected.

I found this site with tutorials on high pass and low pass filters.

#Converting multiple piezo pickups to one input free#

(and still have an input free for microphone)

#Converting multiple piezo pickups to one input software#

The purpose of this is to wire up pairs of piezo pickups (one filtered high, one filtered low) into one mono audio input per pair on my soundcard and then use software filtering to discriminate between the filtered piezo hits, so I can trigger different drum samples.

I am looking to use some resistors and capacitors as a passive audio filter on some piezo pickups I have wired to some electronic drum pads.