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33 votes
3 answers
64k views

What does 'Poles' mean in relation to a filter?

Sometimes filters are referred to in terms of dB/Octave (a 24dB/O is a common low pass filter setup, for example), however sometimes they are referred to in terms of 'Poles' (I've seen switchable 2/...
user avatar
12 votes
4 answers
499 views

Vuvuzela silencing techniques

Last year's soccer World Cup in South Africa brought about many vuvuzela silencing tools. What are the characteristics of vuvuzela noise that allow it to be silenced? What are some of the common ...
user avatar
7 votes
3 answers
27k views

What is the difference between low-pass and high-cut filters?

Is there any difference between low-pass and high-cut filters? There must be, and that's why they're named differently. But, when and why would you use one instead of the other?
Daniel's user avatar
  • 201
7 votes
1 answer
576 views

Audio tweaks pre-encoding for high quality MP3 output

I run an internet radio station. We encode our audio into MP3 at 128kbit, joint-stereo 44.1kHz, with LAME. Obviously there are limits to the quality that can be achieved with this bandwidth... that'...
Brad's user avatar
  • 2,588
6 votes
1 answer
2k views

How to keep audio-fequency noise from my refrigerator out of my audio gear?

I recently replaced my refrigerator with a brand new LG model LTCS20220W. The fridge is silent, but when it is running, my guitar amplifier is picking up a 4,500Hz signal which is driving me crazy. I ...
Scott Simon's user avatar
5 votes
1 answer
88 views

Sending different ranges of frequencies to separate channels?

How would I send specific ranges of frequencies to different channels like the example I made in photoshop below? Right now I'm using FL Studio 9.7
user avatar
5 votes
1 answer
1k views

extract specific frequencies from audio

As you can see from the spectrograph, there are two melodic lines in this excerpt. These two voices are played by different instruments. Is there a tool (preferably free) that will allow me to extract ...
goweon's user avatar
  • 151
4 votes
4 answers
5k views

Filter Reverb and Echo at the time of recording in Audacity or any other software

I am recording video lectures. The sound in those lectures must be clear from outside noises and also any echo/reverb. At my home I have only one room where the traffic sound and other sounds (barking ...
Bangash's user avatar
  • 141
4 votes
3 answers
709 views

Low Pass Filter?

I've constantly heard about the Low-Pass (or High-Pass) filter, but I am confused. I read that it works on cancelling out certain frequencies that are below (or above) a certain threshold. However, I ...
user avatar
4 votes
5 answers
378 views

How to amplify mans voice in a noisy recording?

There is a party and as usual people are grouped. We have 2 groups - in first there is a woman who is telling a story at the moment. In second, there is a man, telling interesting anecdote. We have 7 ...
user avatar
4 votes
1 answer
2k views

Filter to make music sound like it's being played in a mall?

I'm trying to conceptualize how I want the music for my game to sound, and as I have no musical experience, there are some ideas I have trouble describing, but the musical aesthetic I want for my game ...
Darin Beaudreau's user avatar
4 votes
1 answer
103 views

Is there something wrong with my ears? (perception of frequency and their dynamics)

When using EQ, I have more difficulty hearing what's being suppressed compared to what's being boosted. For example if I put white noise on a channel and sweep the parametric EQ up and down the ...
Louis Somers's user avatar
4 votes
2 answers
11k views

LAME: Why is a lowpass filter used with --preset insane

After analysing various converted mp3's I've found out that the LAME encoder uses a lowpass filter for the insane preset (CBR 320), but the filter seems to be disabled for the extreme preset (VBR V0). ...
Tieme's user avatar
  • 166
4 votes
1 answer
228 views

Simulating effect of various metal speaker grills

I'm looking to create software which will simulate the overall effect of different styles, sizes and openness of speaker grills on the audio received by the listener. So far I have the following ...
John's user avatar
  • 143
3 votes
2 answers
15k views

Kylo Ren Voice Changer

I'm curious to know what kind of voice changing affects were used on Kylo Ren in Star Wars VII. It sounds like a pretty basic gravelly distortion filter that lowers his voice, but it still sounds ...
Josh B.'s user avatar
  • 143
3 votes
2 answers
148 views

Basic pitch processing

I am using matlab to construct a simple synthesizer, starting from fundamental sin waves. When playing two successive pitches their is a "tick" noise appearing at the junction which I would like to ...
ouzala's user avatar
  • 31
3 votes
2 answers
3k views

Removing pop sounds and heavy breathing from male voice

We have a male actor who tends to breathe heavily and enunciates his p's quite distinctively. What could we do to reduce or completely remove the pop-like sounds during a live performance? Any eq ...
NPESlayer's user avatar
3 votes
3 answers
15k views

What is the purpose of an FFT filter?

I've used the built in FFT filter in Adobe Audition to get some vocals sounding like they're coming from a police radio, and while the black box worked, I'm just curious as to what the FFT filter is ...
Chris's user avatar
  • 31
3 votes
1 answer
136 views

How is this synth sound made? (WarGames, 1983)

I'm studying the soundtrack to WarGames (1983) - this track in particular, History Lesson: There's a repeating phrase throughout, here's a short clip: https://www....
GreenTea's user avatar
3 votes
1 answer
177 views

How can I create this transition effect

I don't know what this popular transition effect that DJ's use is called, but I'd like to know how can I recreate it with common DJ programs (like Traktor) The effect I mean is the kind of noise in ...
user avatar
3 votes
2 answers
386 views

How can I use one sound to filter another sound?

Imagine I have two sounds: Sound A is a very saturated, dynamically high and flat sound. Like a distorted guitar. Sound B is very dynamically complex, such as a vocal line. Is there any way for me ...
progressiveCavemen's user avatar
3 votes
2 answers
121 views

Filter or Eq out certain parts of the spectrum without introducing transient distortion

As we all know windowing function or any kind of EQ'ing could destroy transients, introduce ringing artifacts etc...I wounder is there any other way achieving tasks such as filtering certain partials ...
texture's user avatar
  • 73
3 votes
1 answer
154 views

Critical listening examples for compressors and digital filters?

I'm looking for listening examples for the following applications: -Compressors usage (what to listen for when changing parameters such as ratio, attack, release time, etc). I've found some material ...
jimijazz's user avatar
  • 223
2 votes
13 answers
828 views

What's the wackiest software filter out there?

For pure filtering mayhem, what are people grooving on these days? Is there anything approaching, or surpassing, devices like the Sherman Filterbank for extreme filter-based processing? There are a ...
NoiseJockey's user avatar
  • 11.1k
2 votes
3 answers
10k views

Software to identify words or voices in a recording?

I have several legally obtained recordings ... too many. They're not labeled and I would like to see if I can "scan" these recordings for a particular voice so I know if that person is on that ...
kenlockone53's user avatar
2 votes
1 answer
115 views

What microphone is used in these videos?

What microphone (and mount) does this girl use in her videos? Examples: Also: Would using a pop ...
user avatar
2 votes
1 answer
135 views

Dayton Audio mic calibration file details

Dayton Audio provides calibration measurements for some of their mics in the form of a text file mapping frequencies to gains for that particular mic (by serial number), e.g. one of mine is: *1000Hz -...
Jason C's user avatar
  • 221
2 votes
1 answer
193 views

can you combine a high passed signal and low passed signal to get original signal

suppose you take a signal, and duplicate it, then apply a low pass and high pass filter both with the same frequency and roll-off respectively to each signal, then combine the two signals additively, ...
micsthepick's user avatar
2 votes
1 answer
1k views

What type of filter is the "French Low Pass Filter"?

What kind of filter is a French Lowpass Filter? In one example I know of, the Serum soft synth, there is a lowpass filter called the "French LP" under the "Misc" set of filters. I suspect it may ...
rcd's user avatar
  • 151
2 votes
2 answers
136 views

MKH8000 / MZF8000

I've put together a new M/S rig of a MKH8040 + MKH30 - still waiting for some of the pieces to arrive. I often hear about the strong low end pickup on the 8040 and know that's there's the MZF8000 ...
Stavrosound's user avatar
  • 6,699
2 votes
1 answer
1k views

LAME bitrate and lowpass filters

Is there a formula or chart that specifies what lowpass filter LAME will automatically invoke for certain bitrates? I've looked around the net and can't find anything on this. And is there a specific ...
trlkly's user avatar
  • 123
2 votes
2 answers
175 views

specifics of clipping distortion perception

Why clipped sound perceived like someone is pouring sand on drum's membrane? It feels like it happens on specific frequencies and not totally random. Which maybe means it can be filtered? Can we ...
IlliakaillI's user avatar
1 vote
4 answers
980 views

How can I improve this chain of filters to make a better voice with Audacity

I'm a true beginner in sound design, and use of softwares to edit sounds. However I started to make a chain of filters in Audacity (File > Edit Chains). I'm recording podcasts with only my voice as a ...
Léo's user avatar
  • 111
1 vote
2 answers
12k views

how to remove sound clipping in existing record

I have an old record that has some clipping effect that happened during recording. This is a song, so i can't just cut out all frequencies probably ... is there any smarter way around to get rid of ...
IlliakaillI's user avatar
1 vote
4 answers
320 views

Envelope-following bandpass filter?

Anyone use one as a plug-in that they like the sound of? I'm specifically working on something where this would save exactly one metric butt-ton of automation...
NoiseJockey's user avatar
  • 11.1k
1 vote
1 answer
413 views

Filter slope and roll off freq add up?

Here's a little something that puzzles me; do I add up the roll off point (-3db) to the attenuation per octave (eg. 18dB/va) or not? Am I correct that the roll off point is not to be considered ...
user3810130's user avatar
1 vote
1 answer
2k views

How to filter guitar sound to create a backing track

I was wondering if there's kind of a "rule" to filter guitar sound from a track. My idea is to create my own backing tracks, e.g. I did not find any backing track of "Roxette - Listen To Your Heart", ...
Michael's user avatar
  • 257
1 vote
3 answers
1k views

Microphone/Extras for video-tutorials/screencasts

For making video-tutorials/screencasts, what is a good, yet affordable microphone and what additional extras do I need? The tutorials will revolve around programming, so things to consider might be ...
user avatar
1 vote
1 answer
34 views

Why is Fourier space not adecuate for (theoretical) filters? [closed]

As far as I have seen, almost all theoretical filter design occurs in Laplace or Z-space. Also, there is a pervasive connection to real life analog filters in the design. If one is just thinking in a ...
wpkzz's user avatar
  • 111
1 vote
2 answers
111 views

Filter certain instrument/sound from track

I'd like to eliminate a certain sound from a track, namely the one produced by cymbale. Take a look at it: https://vocaroo.com/i/s1FpZrxM07TK It has a very unique signature compared to the ...
potato's user avatar
  • 111
1 vote
1 answer
3k views

Stand and Pop Filter for Samson Go Mic [closed]

Which Mic stand and Pop Filter is best for Samson Go Mic?
Clicker's user avatar
  • 123
1 vote
3 answers
6k views

Why do the orders of hi/low pass filters go in 6 dB increments?

A low pass filter - the first order is -6 dB per octave and as the order increases, so the cut is increased by 6 dB i.e. -12 dB, -18 dB, -24 dB, etc. Why is it 6 dB? Why can't it be 4 dB for ...
Ryan Ashton's user avatar
1 vote
0 answers
38 views

How Does A Filter Work?

I was reading secret synths, and understood how the phase shift between two identical signals can result in filtering. But the way it'd written makes it seem like the filters attentuating is different ...
ToniToniToni's user avatar
1 vote
0 answers
261 views

How to use a jack route as a single audio-filter with ffmpeg

I have configured Ardour and there, An audio track takes input from a Jack-Sink device Applies some effects by using some Aux-Send Outputs the final audio to Master which is a Jack-Client Now, I ...
Chitholian's user avatar
1 vote
2 answers
2k views

Bandpass filter on omnidirectional microphone (experimenting)

Simple thought, this is more for experimenting than anything else. I am well aware the end result may sound horrible, so please don't presume to preach to me here. I play music. I have a battery ...
Boloar's user avatar
  • 53
1 vote
1 answer
1k views

Is homemade noise cancelling possible using existing hardware and included software/filters?

I'd like to create a higher tech noise cancellation machine (possibly with added white noise) for a room to reduce the sound of snoring from the next room over. I was thinking that by placing a mic, ...
Ein Doofus's user avatar
1 vote
2 answers
122 views

Need software-based, resonant filter for 90's ROMpler

Any suggestions on how to add a resonant filter to a keyboard that does not have one? I have a Alesis Quadrasynth (QS4) and want to do midi-triggered filter sweeps in real-time. Thank you! Dan
Daniel Johnson's user avatar
0 votes
2 answers
292 views

"Chiptunify" a wave file - possible?

I got several music in flac format (which I can convert around) but the thing is this: is there some sort of filter that can "alter" the sounds in some ways to make it sound like chip tunes? For ...
user avatar
0 votes
4 answers
1k views

What is the relation between high pass (low cut) filters and headroom?

I use, just like most of you I guess, high pass filters in my mixdowns to clean up muddyness and save headroom. I have a subscription on Computer Music in which every month a producer named Owen The ...
BRHSM's user avatar
  • 266
0 votes
1 answer
58 views

Is the amplification of a resonant filter's self oscillation increased by the gain applied with the filter?

Is the amplification of a resonant filter's self oscillation increased by the gain applied with the filter? The question may not make sense, insofar as I guess that filters are subtractive, so in what ...
user avatar