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Extract and Boost Very (Super Very) Narrow Low Freq Range
Hi,
I want to extract say 100Hz - 200Hz out of a violin sample..... [H E L P]
I've tried FabFiler. See the screen snapshot below. I'm not sure how good it's doing. Maybe it is working, but since I can't get, or don't have a clean amplifier or boost, I just can hear it.
then I wanna cleanly amplify it; CLEAN boost no distortion artifacts [H E L P]
then I wanna resonate it (optional) [I got this part accomplished]
then I wanna reverb it [I got this part accomplished]
SoooOOOooo....any thoughts on plugins to help. The first two items, and especially with the CLEAN amplification.
Thanks
Comments
You won’t find an eq that does a better job of filtering a narrow band than Fabfilter. If you have AUM, you have a clean boost. Use its again node.
Try using three filter bands. Do a high order Butterworth type as an LP and another as an HP to narrow the range to the frequency band you want. Then use a peaking or resonant bandpass to get the resonance and gain that you are looking for.
Edited to say that what I'm suggesting looks close to what you are doing, but the filter types I'm suggesting won't pull the signal down like it looks like what is happening with your high pass. the Butterworth type filters will also be smooth and natural sounding and won't cause too much artifacting in the pass bands.
Edited again to put up an image and see if this is what you are thinking about:
Hmmm, FF Pro-Q 3 has brickwall filters and up to 36db gain on the output which should be enough. Use two brickwall nodes one low cut (100hz) and one high cut (200hz) to totally isolate the required frequency band then use the output gain and keep an eye on the output level.
@espiegel123
You said:
You won’t find an eq that does a better job of filtering a narrow band than Fabfilter. If you have AUM, you have a clean boost. Use its again node.
Thanks for this. I have very effectively filtered the frequencies I want using two back to back brick wall filters. I am not quite certain where to find the clean boost that AUM has? You said "again node"
Are you saying to use a gain node, and then another gain node, one after another?
Thanks
AJ
That gain node is as clean a boost as there is. If you need more gain, add yet another.
First ~~~> Thank you so much for your replies.
I'm getting very close, and it's WILD. The back-to-back brick wall filters work like a CHARM!!!
I've 2 back-to-back AUM gain filters (part of AUM in the Dynamics->Gain).
Then.... the part that I had already solved: a Bleass Audio Filter, and I using a notch (upward) filter and using an LFO to make a filter sweep with it. Then Altispace reverb.
This is me playing some violin scales..... check it out now.
You've taken most of the energy out of the signal with how much you've cut. The gain node has a +24db lift, but it's not working with much signal any more. As @espiegel123 said you can add multiple of them.
The overall energy is going to be pretty low until you really push the gain. Be careful doing this because if you hit resonances further down the processing chain in the frequency band you have selected, things could get loud fast. I'd put a limiter on the end of this one for sure.
TB Equalizer (my favorite) has 48dB low and high shelf filters:
But tbh you can do it all inside AUM by chaining multiple LP and HP filters until you get the filter steepness you want.
FabFilter Pro-Q3 has 96dB/oct band pass; screenshot of Band Pass Narrow preset:
I'm not sure what you're trying to do, but I wanted to mention that if you're trying to extract notes from a violin performance and manipulate them in ways that retain their violin nature, Melodyne is the best tool I know of. But unfortunately it is not on iOS.
Interesting. I hear very slight hints of what I think must be a tiny amount of the attack coming through. If you are looking to get rid of that maybe running through a transient shaper like a Boss Slow Gear would help and give you a bit more flexibility in how much you needed to bandpass the signal. If that's not what you are looking for, then this wouldn't help at all. This is one of my favorite effects on guitar, but I do it with a volume pedal and then process the signal after to do weird things.
@Vmusic To setup a bandpass between 100 and 200hz use the following steps in ProQ:
1) From an empty default without any filters, doubletap the 0db line at around 100hz, this generates a low pass filter
2) Tap on the filter type text and in the popup change th type to low cut
3) Tap on the colored circle of the filter to bring up the details dialog. In that dialog, tap on the frequency to manually enter the number 100.
4) Tap on the filter slope to change it from the default 12db to something steeper. ProQ supports up to 96db filters.
Do the same steps for a second filter, this time a high-cut at 200hz
Maybe also change the general filter processing mode from ‚zero latency‘ to ‚linear phase‘ (and then also set the strength) to avoid phase shifts.
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Using a low-cut and high-cut combination allows to exacty specify the bandwidth and you can use different slopes on both sides.
——
Oh, just notices that‘s what @Samu already wrote and you already managed to use such a setup.
But perhaps my post with screenshot and steps still might help someone
@_ki - it's helpful to me!!! Thank you
@Vmusic that‘s not a super-narrow approach, but just a simple octave grab.
It would would qualify as such if you‘d plan to do the same from (f.e) 1000 to 1100 Hz, though.
Bottomline: it‘s about frequency ratios