I’m trying to find out more about the filters, things like the differences between the ladder filter and multi mode filter, how they respond to different oscillator levels, different resonance settings etc. It would be very interesting to hear your experience with this. And it would be nice if we can avoid a discussion about whether the A4 filters are bad or good, it’s more interesting to find out how we can get the most out of them. This is perhaps not very interesting to all, but I guess some of you are interested in the topic.
Here is what I have found so far with my A4Mk2:
- The filters behave VERY differently. The most noticeable difference is how the ladder filter reduce the resonance at lower frequencies when doing sweeps while the multi mode filter continues sweeps with full resonance all the way down to the sub frequencies. This can be a good thing but it can also give very boomy bass or boxy (is that a word?) low mids. And it can cause serious distortion if the oscillator levels are not reduced.
- Generally I find the multi mode filter cleaner but it can also sound annoying with high resonance levels. The ladder filter sounds a bit drier and warmer to me. And even high resonance levels don’t hurt my ears.
- Higher oscillator levels reduce the dynamics of filter envelopes, even when the overdrive is not used, I guess the signal is somewhat saturated.
(This is just my subjective experience, I have not measured anything)