The SMR4P-Multi contains the best from 2 worlds . First , it sounds warm like the SMR4 and second -
15 different filtertypes like the 4PM.
While doing sounddesign it is very helpfull to have a ' swiss knive' VCF. So we implement 15 different filtertypes like
6+12+18+24dB LP 6+12+18 dB HP 6+12 dB BP HP2LP, HP3LP Notch,Phaser, Notch+LP1, Phaser+LP1.
What else we have build in ?
There is also a FM posibility, an inbuild VCA , and you can switch the different filtertypes a:) manual or b:) voltage controlled.
What does the FM function do?
With filter FM, the audio signal is decoupled at the first filter pole and controls the filter cutoff via the FM potentiometer. Thus we have a filter frequency modulation. This gives the audio signal additional overtones.
Inputs: Audio in, Res= resonance contol (0..10 V),Gain(VCA control 0..10V) , Mod (extern) and Cut(V/OCT0..10V)
Outputs : VCA and VCF *** VCA, the output singal is contolled in its amplitude by Gain 0..10 v
VCF is the direct signal without VCA controll
DIY scills : good soldering knowledge , high integrated parts - through hole , no SMT
More Informations and downloads, klick on the text
Changes due to component shortage.
1:) styroflex capacitors 330pF instead of WIMA 330 pF
2:) Atmega 168 instead of Atmega 328
Due to the current component shortage, components may change. This does not change the functions or the sound.
Technical changes 09.06.22
Quickstart manual SMR4P-multi