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Voltage Controlled Filter - x0xb0x
http://x0xb0x.org/pages/ladyada.net/make/x0xb0x/fab/vcf/
There is an 'official' tuning for the VCF. According to the Roland TB-303 manual, when playing C1 (65.4Hz) with the cutoff frequency knob set to 50%, saw waveform, and resonance knob at 100%, the resonance frequency should be …
x0xb0x®
http://x0xb0x.org/pages/ladyada.net/make/x0xb0x/mods.html
VCF Audio In. Use any panel mount jack, and connect the sleeve to ground. The tip should be connected to one side of a 100K resistor, the other side is connected to the negative side of a 1uF capacitor, and the positive side connects to the point …
x0xb0x® - ladyada.net
https://ladyada.net/make/x0xb0x/mods.html
VCF Audio In. Use any panel mount jack, and connect the sleeve to ground. The tip should be connected to one side of a 100K resistor, the other side is connected to the negative side of a 1uF capacitor, and the positive side connects to the point …
MATRIXSYNTH: x0xb0xmod
https://www.matrixsynth.com/2007/07/this-is-major-mod-kit-for-x0xb0x.html
Filter Mod CV In (Audio) VCO Out VCF In VCF Out Accent Sweep Out New Indicators: Gate On LED (logo) ENV2 LED Accent Decay LED Env Decay LED Hi Resonance LED Cutoff Hi Range LED links to the audio demo's: x0xb0x Mod Audio Demo1 x0xb0x Mod Audio Demo2 x0xb0x Mod Audio Demo3" via Brian
Voltage Controlled Oscillator - x0xb0x
http://x0xb0x.org/pages/ladyada.net/make/x0xb0x/fab/vco.html
The first section of the main board to be assembled is the VCO (voltage controlled oscillator). This section converts a logarithmic voltage into a scaled oscillation. The relationship between the voltage and oscillation is called "1V/octave" because every 1V increase corresponds to a 1 octave increase in sound.
GZIFCAK.NET
https://www.gzifcak.net/eim/x0xb0x.shtml
x0xb0x (303 clone) modifications-extended env depth-filter input level/overdrive-accent decay/minimum filter decay-VCA decay-resonance boost-VCO to VCF FM-VCA to VCF FM-zero minimum env depth-extended accent depth-VCO out-VCF in audio sample details of most mods at: ladyada.net x0xm0d forums x0xd0x wiki minor devilfish mods
x0x:vcfmods [AdaWiki] - ladyada.net
http://www.ladyada.net/wiki/x0x/vcfmods
- VERIFIED to work on the x0xb0x. UPDATE: It is a good idea to buffer the waveform output. Use a 0.1uF ceramic cap after the 100K resistor. The Mod works great and is especially good at high resonance levels, so make sure you include the Resonance Boost Mod also! ... The signal where R121 and R122 meet is where the audio from the VCF comes out ...
subatomic x0xb0x mod guide...
https://www.subatomicglue.com/x0xl0g/mod%20guide/mod%20guide.html
The mods were selected for 1.) simplicity 2.) dramatic effect 3.) ability to turn off and return the x0xb0x back to stock (most important to me was to not lose the x0xb0x sound!). Total cost of parts are around $20-$30, and for this small amount, we get some nice additions to our x0xb0x arsenal, check out the sound clips
Make it! - x0xb0x
http://x0xb0x.org/pages/ladyada.net/make/x0xb0x/fab/
It is highly unlikely that replacement parts will be available in case something goes wrong. However, the BOM (bill of materials) is available, and you can easily order your own replacement parts for common items from any reputable electronics supplier.There is also a list of 'odd transistor' suppliers on the resources page where you may be able to locate replacement parts.
Has anyone used this sound card probe? - Adafruit Industries
https://forums.adafruit.com/viewtopic.php?t=10597
Virtins Sound Card Oscilloscope Probe I want to use this probe with the Zeitnitz Software Scope.I tried out the ladyada version with with no success and while I'm all for the DIY approach, this is one of those tools that would just be good to have in the tool box ... without lugging around a 40 pound piece of hardware.
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