User Tools

Site Tools


x0x:voltagecontrolledfilter

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
x0x:voltagecontrolledfilter [2007/10/05 19:04]
hl-sdk
x0x:voltagecontrolledfilter [2016/01/28 18:05] (current)
Line 5: Line 5:
 (Transistors are apparently more versatile than diodes and whenever designing a diode ladder VCF, use transistors. matching is very important, that's all I know) (Transistors are apparently more versatile than diodes and whenever designing a diode ladder VCF, use transistors. matching is very important, that's all I know)
  
-This filter has the property where resonance is increased, the peak stays at the same volume and the passband is reduced in volume. ​ This is contrasted with the state variable filter where the passband retains its volume, and the peak gets louder. ​<--what? where did you hear this?+This filter has the property where resonance is increased, the peak stays at the same volume and the passband is reduced in volume. ​ This is contrasted with the state variable filter where the passband retains its volume, and the peak gets louder. ​
  
-The output is taken from the VoltageControlledOscillator switch, and fed to R62 and C17 (providing attenuation?​)  Then it is sent to the left base of Q12, and also attenuated to 5.333V via R68, R70, R98 and C16, and send to the right base of Q12. The common emitter of Q12 serves as a (current based) control for the cutoff frequency, and this is where the EnvelopeGenerator is input, both for the Env Mod values, and the Accent. ​+The output is taken from the VoltageControlledOscillator switch, and fed to R62 and C17, AC coupling the filter ​(VCO has DC offset) Then it is sent to the left base of Q12, and also attenuated to 5.333V via R68, R70, R98 and C16, and send to the right base of Q12. The common emitter of Q12 serves as a (current based) control for the cutoff frequency, and this is where the EnvelopeGenerator is input, both for the Env Mod values, and the Accent. ​
  
 ==== Block Diagram ==== ==== Block Diagram ====
/home/ladyada/public_html/wiki/data/pages/x0x/voltagecontrolledfilter.txt · Last modified: 2016/01/28 18:05 (external edit)