Let's see your KEYS/SYNTHS!

[skullservant]

Thanks man!

I'll definitely have to try that! I'm also looking into adding an external filter input, but I haven't really found any schematics on how to. Any suggestions?

[eatyourguitar]

the low pass filter is a completely passive RC filter. look at the schematic, you would connect your external audio in right at pin 2 of the opamp. the filter just drains high frequencies to ground through some caps and resistors depending on how you adjust the pot. the 750k is for increasing the impedance (resistance) of the incoming signal. your input should have a similar input impedance. so a 750k from the tip of the input jack to pin 2 of the opamp would do it BUT there is a problem. the volume would be too low on the external input. the solution is to put a 500k pot in series (not to ground) with a 100k resistor. label the control as sensitivity or input gain. notice how this creates a passive mixer with two resistors going to the same place (pin 2).

[skullservant]

Sweet! I'll definitely have to do this. So Input tip has 750k to pin 2, 500k pot and 100k resistor to pin 2. Where is the 100k resistor going to?

[eatyourguitar]

well you could do it with a 750k resistor and no pot. this would give you equal impedance for the synth and the external input. I can already guess that the WSG before the 750k is very loud. your guitar signal is not really that loud by comparison. the stock 750k @ R11 changes impedance but also reduces volume of the synth part. two 750k resistors doing the passive mixing into pin 2 would give you equal volume. since we know thats not what we want, use a pot and a resistor to make the external input impedance variable from 100k to 600k. this is done by putting a 100k resistor in series with a 500k pot. then connect that assembly between the jack and pin 2.

[skullservant]

Ah! thanks for the clarification man. I'm a really visual person so sometimes it's hard for me to visualize words, but that second explaination helped a bunch!

[Jenkins]

I got this for FREE!!!

[theavondon]

I got this for FREE!!!

Synth 1.jpg

Synth 2.jpg

Score!

[jskadiang]

Synth mangler. Good for mangling synths apparently.

[kbit]

I was tempted to make an offer on your synth mangler for that exact reason. Awesome set up

[blahquaker]

my modular is slowly growing

[Jenkins]

my modular is slowly growing

WOW!!! thats a nice rig!!!

[Gozu]

holy.... damn

[mrmtzion]

Here's my MFOS WSG I built a few months ago
Put a ZVex Super Hard On at the end of it because the output was kind of low

please trade me this.

[skullservant]

It's my main noisemaker! I just got a Moog Ring mod off Zounds, going to try it out with it. The WSG is a beast and a half. My favorite!!

[colin]

New Synth Day!!!



I posted a few weeks back that I'd bought a malfunctioning Korg Poly-61 (I think that was lost in the forum meltdown), which turned out sadly to be irreparable. I didn't lose much on that, and I in hindsight it was a good thing as I like this thing way more.