Hi, the answer to this might be obvious but I wanted to ask Graham or anybody that can help why he puts multiple auto filters or EQs in one rack? I noticed that he does this in a number of instances in the tutorial and would like to know what the use of doing this is and what kind of situations would require this. Thanks.
most likely for ease of automation of filter sweeps etc.
you might want a filter cutting the lows and also one that is sweeping in certain parts.
Yeah that’s usually it. Also I would maybe use a second roll off after a lot of other effects just to make sure the bottom end is still under control. Some times as far as EQs are concerned I simply find it easier to see a separate effect doing a single thing than one effect doing many things. Simple as that really.
Thanks Phil and Graham. That clears it up on the EQ.
For the filters I noticed that Graham uses multiple instances of them in situations where there is a high pass filter, followed by a bandpass filter with an LFO on the frequency, then he sticks in another high pass filter because the bandpass filter may introduce some low frequencies? Is this always the case? Why would the bandpass filter introduce low frequencies that are cut off by the first high pass filter?
Just trying to wrap my head around this, but is the workflow pretty much this:
- First high pass filter allows through high frequencies within range
- Bandpass filter sweeps through some of the frequences within range of 1st HP filter, but 1st HP filter cuts off some of the frequencies that the bandpass filter sweeps through
- 2nd HP filter removes low frequency artifacts introduced by bandpass filter?
Thanks.
Because of the resonance of the bandpass.
filters dont cut the frequency complete dead… its a slope off so there is always still some freqs reaming to point.
[quote]phil johnston (01/06/2012)[hr]Because of the resonance of the bandpass.
[/quote]
Hopefully I’m understanding this right. So essentially the frequencies where the first HP filter is sloping off, these may get accentuated due to the resonance of the bandpass? Would the bandpass introduce frequencies below where the first HP filter slopes to 0?
Possibly if the resonance was high enough as its its creating new harmonics.