Hot answers tagged filter
7
First of all, tell us more about the filter. Is it really a brickwall filter, or are you actually using a low roll-off or low cut-off filter? In the latter case, it is perfectly normal, when using a high cut-off filter, the low frequencies decrease with -6dB per octave below the specified frequency, and are not completely gone. Roll-off is the same, but with ...
7
It is not likely that you are going to be able to work around this using EQs, while leaving the rest of the sound intact / not weird sounding. The vuvuzela sound is quite broadband, as far as I know. (Never measured it though.)
It is neither likely that many facts are known about the characteristics of the vuvuzela. That means, probably the best way to get ...
7
The characteristic that allows the vuvuzela to be isolated in removed is the fact that the sound is constant pitch. So removing it is a fairly simple exercise in EQ:
1. Identify the base frequency (around 235 Hz) and harmonics (the strongest is the first harmonic around 470 Hz).
2. Add an EQ filter at each of the frequencies of step one with a narrow Q (to ...
5
Your best bet will be to run your source material through a bitcrusher and a sample-rate reducer. However, that will just make it sound like the kind of low-quality samples that could be played back on old machines. Actual chiptune music tends to involve very careful use of low-resolution waveforms and FM synthesis.
5
The "cocktail party problem" is actually a famous example in signal processing, and there are several different Blind signal separation or Source separation algorithms to solve it in different conditions. Are you doing this for homework in such a class? I've got an example of one on my website, but this statistical method (ICA) wouldn't work well for you ...
4
I wanted to add that she has very pleasing tone and natural voice.
After careful visual inspection, I am pretty certain that this is an AKG Perception 220 Condenser mic.
The mount comes with it, at least at this site:
http://www.musiciansfriend.com/pro-audio/akg-perception-220-condenser-microphone
"Spider-type shock mount and metal case included"
A ...
4
Best I've been able to come up with to this one (and I'm interested in a better answer here myself) is a GearSlutz thread on what (if anything) anyone is doing differently to master for streaming audio. The answer from Lupo is relevant and interesting. He suggests:
Level is important. 'Hidden' overshots will be revealed through coding and decoding. ... ...
4
You wont get that effect with just an EQ.
try using a bitcrusher effect to reduce the bit-depth to 8 or 16 bits, maybe some saturation and a lowpass at the end to tame some of the distortion.
The characteristics of these old game sounds come almost entirely from the crazy low resolution and data compression necessary at the time to get the samples onto the ...
2
Not wanting to be funny, but WAVES released a preset pack for a processing chain to get rid of vuvuzela for post when the world cup came out. A friend of mine was doing extensive editing on footage for some tv stations and he said it actually works. Might be worth to give it a shot? if you have an iLok you can even get a 15day trial!
2
That sound is due to a combination of low sample rate and low bit depth. Those are the 2 parameters you can control to diminish the data size on PCM data, which they had to do for the old game consoles because of their limited storage and processing power. A very low sample rate without pre-filtering introduces strong aliasing, and a very low bit depth ...
2
Like Shane said, use at most 8-bits resolution, but also [re-]sample it around 4kHz or less. No lowpass filter necessary as you want the higher frequencies to wrap "poorly" while sampling at the low sample rate. (Though, some re-sampling actions on audio editors may do that lowpass for you).
2
Really nice question, common problem.
After Effects, Autodesk Combustion and Autodesk Smoke can bring you a software downconversion(1920x1080 -> 720x480) with more quality than Final Cut Pro or Premiere Pro. Smoke can make it near perfectly.
You can use (buy/rent) hardware downconverters, like AJA Kona 3, or Blackmagic clones. Better results goes with AJA. ...
2
Type of mic
There are three basic kinds of mics you're likely to run into: dynamic, condenser, and ribbon. Dynamics are straightforward moving-cone mics, condensers use an electric field, and ribbons use a very sensitive and delicate metal ribbon.
Both dynamic and condenser mics will work great for your purposes, so you don't necessarily have to restrict ...
1
The question about the nature of clipping phenomena was discussed many times here on this site (for example here) and on dozens of other places which are easily googled.
So as it was already discussed, clipping - is just few points where signal amplitude exceed the available range of finite amplitude levels. This causing the wave signal to become less ...
1
It is impossible to repair clipped signal, since when clipping occurs, part of the original signal is eliminated and cannot be restored. The phenomena is described in the below image:
However there are few commercial clicks\pops removal apps available which could improve the signal. The following list of software appear in Wikipedia:
Sony Sound Forge
...
1
This might be better suited as a comment to your original post, but alas I do not yet have those privilegies.
Anyway, my answer to you would be a cliché one: Keep tinkering.
It's really a matter of finding out what effects Premiere can offer, deciding which will be able to assist you the most and then going back and forth between them until you find a ...
1
Condenser mic va. dynamic mic: personally, I think either is a good choice for general recording. The basic difference is that Condensers' signals are based on capacitors and Dynamic on electromagnets. Condensers are more susceptible to weather conditions, as the pickup element is generally very tiny, but the small mass of material that needs to be moved by ...
1
Adobe Premiere should do exactly what you want - it has a ton of effects plugins.
As to your second question, any screen grabber video software should let you do this - you play the video and have your wacom sketch overlay running, and just use the screen grabber software to make a video of everything displayed on the screen.
1
(If this is too elementary please forgive me. Not meaning at all to talk down to you!)
Say you have a "noisy sine wave" on your oscilloscope. The main part of the sine wave is the low-frequency part, and the noise (the "fuzziness") on the sine wave is the high-frequency part.
The oscilloscope sweep would be your time domain.
Low-pass filters let the low ...
1
In general a filter is not something that completely removes a given set of frequencies. Rather, it just attenuates them - cutting some percentage of them out. In extreme cases (kill EQs on DJ mixers come to mind) the attenuation is so much that it may as well be considered getting rid of it entirely.
Wikipedia has a pretty good graph of how a low pass ...
1
(I submitted this answer to the SO version of this question, I assume one or the other will be closed, not trying to pad rep or anything)
You might look into the LMS algorithm by Widrow and Hoff. You could apply it to each of your mixed recordings, using man.wav as the desired reference and woman.wav as the disturbance signal. There's also a way to use it ...
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