From the original SynthMaker forum (2004–2014), with its members’ names and dates.
Dave ·
Hi,
if using the 303 Low pass filter from the Analog Kit it produces a "wrong" sound 🙁
I start with this settings:
cutoff=0, reso=0, key=100% ... 1 stock osc with a saw
I turn cutoff to 20% and i hear a deep "rumble".
This doesn't occur if turning reso to 10% at start.
Is this a bug or a 303 feature?
Attached a simple osm with this... just turn the cutoff knob to the right... at around 20% you will hear this "rumbling transition".
Thanks, Dave
MichaelBenjamin ·
its a ~bug in the filter, this line: r=r*(r<0.05)&(0.1*c/0.05+0.9)+(r>=0.05)&r; flips the r value from something small to something high with your current settings when it crosses 0.05. i guess there needs to be another (1-x) somewhere. since r is also dependent on the cutoff value it happens also when resonance is zero. btw this filter has also a unused second freq input that differently maps to cutoff and resonance, dont know what its good for. are you sure this filter is from the default analog modelling kit?
Dave ·
MichaelBenjamin wrote: are you sure this filter is from the default analog modelling kit?
Yes, i did'nt change anything on this one.
You can replace it of course with the same filter of "your" analog kit to prove it.
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