TranceAddict Forums (www.tranceaddict.com/forums)
- Production Studio
-- low pass filter

low pass filter

should I apply a low pass filter on my kick and bass ?
1. on self made kick ?
2. on sample cd kicks eg. from vengeance/uberschall,etc

what settings should I apply on the filter ?
I'm a newbie to production and would enjoy ur advise.

Depends on what kind of sound you want.

What do your ears tell you?

Do you really need to make a new thread about everything?

Put a lowpass and cut everything below 40hz.

Is there a problem that I started a new thread...where else i'm suppose to post this type of question ?

so I lowpass at 40. some filters have a q ? What setting i'm I looking at here ?

(Dj Nacht, I'm sure you mean a high pass filter... you're not going to hear much with a low pass filter set to 40 Hz...)

darkt, heaps of kick samples are fine to use as is (like the Vengeance ones). I sometimes do a tiny little bit of notch eq'ing to slot into the track a little better, but that's it.

As MrJiveBoJingles said, it totally depends on what kind of sound you want. We have no idea what your preference is. The question is kind of like asking "should I like Tiesto's music better, or Armin's?" (I'm just using these two names as examples, substitute any names you want in there.

We can't tell you whether you like Tiesto's tracks better or Armin's, and we can't tell you whether you like the sound of LPF-d kicks better or not. Get into the studio and work it out.

quote:

Originally posted by darkt What setting i'm I looking at here ?

the one that sounds good to you. there is no 'default' setting rule for filters. experiment

What happens if you slap on a high pass filter on a sample that already has the exact same high pass filter settings applied to it?? I have purchased high quality drum hits from various locations and have always wondered, since they have obviously already been processed, if I put a high pass filter on a sample again just to be safe, does it affect the sample at all? Or am I essentially filtering out nothing? My Quad Core really lets me put on as many plugins on a track as i like so I don't mind putting a High Pass filter on these samples, but as long as it's not going to ruin the bottom end at all...

Anyone?

quote:

Originally posted by Blahzaay What happens if you slap on a high pass filter on a sample that already has the exact same high pass filter settings applied to it?? I have purchased high quality drum hits from various locations and have always wondered, since they have obviously already been processed, if I put a high pass filter on a sample again just to be safe, does it affect the sample at all? Or am I essentially filtering out nothing? My Quad Core really lets me put on as many plugins on a track as i like so I don't mind putting a High Pass filter on these samples, but as long as it's not going to ruin the bottom end at all... Anyone?

Putting, say, a HP filter @ x Hz on something that's already been HP filtered at x Hz will result in a steeper cut. Just imagine an untouched sample, and you put a HP filter on it, then you copy that exact filter and put it after. You end up with a total of a steeper slope. So, a 12dB/octave cut at 1kHz + 12dB/octave cut at 1kHz would be the same as a 24dB/octave cut at 1kHz. (Right? my maths is right, right?)

I think you're right, 3F05Q.

Blahzaay, why are you putting filters on individual sounds that don't need them? If you're putting a filter on an individual sound, listen to the sound and whether or not it requires a filter (or use a spectrum analyzer if you think it may have extremely low frequencies your monitors aren't reproducing).

If you want to "just be safe", that no ultra-low frequencies are coming through, you can apply these filters to audio groups (like, route all your pads into a group, for example, or your percussive elements). Then you can just set a high pass filter for the group and you'll know that group of sounds is "safe", without having to worry about each sample. In practical terms, if a sample already has all or most of a frequency range cut away, applying a filter to it will have no/nearly no audible effect.

quote:

Originally posted by 3F05Q Putting, say, a HP filter @ x Hz on something that's already been HP filtered at x Hz will result in a steeper cut. Just imagine an untouched sample, and you put a HP filter on it, then you copy that exact filter and put it after. You end up with a total of a steeper slope. So, a 12dB/octave cut at 1kHz + 12dB/octave cut at 1kHz would be the same as a 24dB/octave cut at 1kHz. (Right? my maths is right, right?)

Makes sense to me... but lets say your monitors only go down to 40hz. How would you tell if the sample has already been filtered at 12db if you can't hear anything lower?

What happens to the sound when you re-apply the filter to sub-groups, meaning your sample has been filtered possibly 2 or 3 times? I usually high pass filter my bass and kick separately, send them to the kick-bass sub-group and filter them again just to be safe. I have seen instances where people have thrown filters on or eq'ed every single audio track/sub-group/group possible. Is this a big no no?

quote:

Originally posted by Blahzaay Makes sense to me... but lets say your monitors only go down to 40hz. How would you tell if the sample has already been filtered at 12db if you can't hear anything lower?

Get a sub? But really, I think your best bet would be to throw a spectrum analyzer on there. I think there are some that you can truncate the viewable range down to focus on the lows, or ones that JUST display the lows?

quote:

What happens to the sound when you re-apply the filter to sub-groups, meaning your sample has been filtered possibly 2 or 3 times? I usually high pass filter my bass and kick separately, send them to the kick-bass sub-group and filter them again just to be safe. I have seen instances where people have thrown filters on or eq'ed every single audio track/sub-group/group possible. Is this a big no no?

I suppose the question is, are the multiple filters just being redundant or not? I suppose I can't quite picture filtering so many times. Six of one, half-dozen of the other. Perhaps there are filters and compressors, then they get grouped, then filtered and compressed again?

What would happen to sound when you re-apply after being grouped? If the ONLY thing you were using was filters, then it's be the same as adding the copied filter to each individual channel. It's addative and subtractive. Now... if there is another effect like reverb and/or delay in there, then I would expect it to behave differently.

Jesus man. Think it through.

1) A low pass filter attenuates high frequency sound gradually above the cutoff point.

2) If you listen to a bassdrum and it has lots of high frequency signal energy that you don't want - use a low pass filter to get rid of it.

Filters and orders:

A single pole low pass filter attenuates signal with a frequency above cutoff at a rate of 6dB per octave.

An octave is measured in multiples of a fundamental frequency so if you have a 60hz sine wave, then a sine wave an octave higher will be 120hz. The next octave up is at 240hz.

So if you use a low pass filter on a 60hz saw wave and the filter cutoff is at 60hz then the output level will be -6dB at 120hz, -12dB at 240hz and -18dB 480hz.

A two pole low pass filter attenuates signal with a frequency above cutoff at a rate of 12dB per octave.

A three pole low pass filter = 18dB/octave.

A four pole low pass filter = 24dB/octave.

A six pole low pass filter = 36dB/octave.

Filters with more poles are referred to as higher order filters. You can graph these results and they should be fairly self explanatory.

Use whichever is appropriate to your situation or don't use them at all if you don't need to.

quote:

Originally posted by Derivative Jesus man. Think it through. 1) A low pass filter attenuates high frequency sound gradually above the cutoff point. 2) If you listen to a bassdrum and it has lots of high frequency signal energy that you don't want - use a low pass filter to get rid of it. Filters and orders: A single pole low pass filter attenuates signal with a frequency above cutoff at a rate of 6dB per octave. An octave is measured in multiples of a fundamental frequency so if you have a 60hz sine wave, then a sine wave an octave higher will be 120hz. The next octave up is at 240hz. So if you use a low pass filter on a 60hz saw wave and the filter cutoff is at 60hz then the output level will be -6dB at 120hz, -12dB at 240hz and -18dB 480hz. A two pole low pass filter attenuates signal with a frequency above cutoff at a rate of 12dB per octave. A three pole low pass filter = 18dB/octave. A four pole low pass filter = 24dB/octave. A six pole low pass filter = 36dB/octave. Filters with more poles are referred to as higher order filters. You can graph these results and they should be fairly self explanatory. Use whichever is appropriate to your situation or don't use them at all if you don't need to.

Usefull Info, maybe you can help me figure something out.
Saturday I was generating a pure sine wav at C3 on my piano which is I forget how many hertz. Anyways I put a high pas filter and put the cut off frequency to exactly the hertz at C3. The tone was almost gone but I could still hear sound. I didnt understand why I could still hear sound since a pure wine wave only contains the fundamental frequency. Technically if I cut the fundamental I shouldnt be hearing any other sound since there are no harmonics?

quote:

Originally posted by Dj Nacht Usefull Info, maybe you can help me figure something out. Saturday I was generating a pure sine wav at C3 on my piano which is I forget how many hertz. Anyways I put a high pas filter and put the cut off frequency to exactly the hertz at C3. The tone was almost gone but I could still hear sound. I didnt understand why I could still hear sound since a pure wine wave only contains the fundamental frequency. Technically if I cut the fundamental I shouldnt be hearing any other sound since there are no harmonics?

true, but you have to take the roll off of the filter as said before. In essential a filter on a sine should more or less act like a volume slider when filtering a sine. the lower you put the low pass the lower the volume of the sine would be. It's possible you still hear something. But the character of the sound should change. (allthough some filters colour the sound which could cause the change)

quote:

Originally posted by Dj Nacht Usefull Info, maybe you can help me figure something out. Saturday I was generating a pure sine wav at C3 on my piano which is I forget how many hertz. Anyways I put a high pas filter and put the cut off frequency to exactly the hertz at C3. The tone was almost gone but I could still hear sound. I didnt understand why I could still hear sound since a pure wine wave only contains the fundamental frequency. Technically if I cut the fundamental I shouldnt be hearing any other sound since there are no harmonics?

You need to adjust the filter to a lower (or higher, if you're using a HP filter) frequency and use a filter with a steeper slope, like a 36dB/octave.

I just remembered that I wasnt even using a filter! I was using an EQ with the narrowest Q Value and made a notch cut at C3 Hertz. Im pretty sure if I would have done it with a high pass filter it would have removed all the sound.

Powered by: vBulletin
Copyright © 2000-2021, Jelsoft Enterprises Ltd.