26
votes
Accepted
Does the .wav file created from a .mp3 file have better quality than the .mp3 file itself?
A WAV file has the potential to hold "more" or "better" data than an mp3. WAVs employ no compression, no loss; they are as close to an exact replica as it is possible to get.
An mp3 employs lossy ...
- 8,405
9
votes
What does 100Hz 12dB per octave mean?
There are three parameters of this filter that are described in the phrase "100 Hz 12 dB per octave low pass filter". I'll cover them in reverse order.
Low pass filter - This means the filter does ...
- 2,190
8
votes
Does the .wav file created from a .mp3 file have better quality than the .mp3 file itself?
No. When you convert a file from .mp3 to .wav, no new information is added: there is no way to regenerate the information that was lost when you created the mp3. All the extra data in the .wav file is ...
- 1,578
6
votes
Accepted
How can I avoid the pop at the end of a file containing a pure frequency?
If you zoom in to your waveform, you will see that it crosses the zero line twice per cycle (880 times per second). If you end your tone recording exactly at a "zero-crossing" then there will be ...
- 1,869
5
votes
Why can I hear 120 BPM, but not 2 Hz?
I think you've misunderstood what Frequency is, with respect to audio. Whilst 'Frequency' typically is 'how frequently something occurs', in audio it's how many times a sine-wave oscillates in a ...
- 1,336
5
votes
Does the .wav file created from a .mp3 file have better quality than the .mp3 file itself?
MP3 is the 'colloquial' name for "MPEG 1 Layer 3" audio encoding. The purpose of mp3 encoding is to reduce the overall size of an audio data stream whilst maintaining an acceptable level of listening ...
- 8,815
4
votes
What is the "level" of Frequency Modulation of many synthesizers?
FM8 mirrors the DX7 implementation which uses a 0-99 value to represent modulation index of 0 to 14. So, an output level of '85' corresponds to an index of 4.
4
votes
Accepted
Frequency distribution graphs in music
There are definitely tendencies - and these mainly appear through the use of the same types of instruments in a genre, some more explicit than others, e.g. Drum and bass, Funk and A capella.
Almost ...
- 3,782
4
votes
What's the name for the type of x-axis scale used in frequency graphs?
It's a Logarithmic scale & is used where a linear scale wouldn't really make sense & would reduce the detail in the lower portions of the graph.
As each octave doubles the frequency. The ...
- 8,405
4
votes
Does the .wav file created from a .mp3 file have better quality than the .mp3 file itself?
In order to make sound, your computer must drive the speaker with a time-varying voltage. In order to create the time-varying voltage, the computer must send a sequence of numbers to a Digital-to-...
- 141
3
votes
Accepted
Programming a Vectorscope
The actual time domain data of your signals (or an 8 bit approximation of it) are stored in the array you get by calling getByteTimeDomainData(). You don't need the frequency domain data.
You just ...
- 2,834
3
votes
Accepted
What property of sound disturbs us?
Change is typically "disturbing". A sharp change of amplitude (a crash, a scream, an explosive sound, etc.) Or even sudden quiet after moderate but steady background noise will disturb some people. ...
- 1,869
3
votes
Accepted
Extract wavelengths or frequencies out of a recorded sound
Wavelength is the inverse of frequency (1/f) so all you need is to perform an FFT (Fast Fourier Transform) on your signal to get its spectrum (harmonic content). This can be done in many ways but from ...
- 1,563
3
votes
Accepted
Purely Mechanical Acoustic Frequency Converter
By far most passive acoustic systems are linear and time invariant. As such, they don't create frequencies not present in the original signal.
Passive systems that aren't linear are typically of the ...
- 46
3
votes
Recording sound and getting the frequency of any given point
Frequencies are a spectrum from 0Hz up to approximately 20kHz. To obtain spectra of sound samples, you will need an implementation of an FFT (Fast Fourier Transform) library.
For the application you ...
- 8,815
3
votes
Accepted
44100 Hz encoded in 24bit vs 16bit
It seems that as defined by the CDDA Red Book, CD quality is 16 bit with a maximum sample rate of 44.1 kHz. I understand 44.1kHz was chosen due to human hearing limitations so I assume 16 bit was ...
- 1,578
3
votes
What's the point of drivers that can produce frequencies that humans can't hear?
One reason may be there is a need for them besides the use for human listening.
Perhaps a human may want to study or devote their careers to Animal audiology.
If you want to study an animal that ...
- 249
2
votes
Conditional math (intersection) to join two audio tracks
Unfortunately, there is no analytical way of seperating the signals the way you want, i.e. you can't isolate the vocals.
To go a little more in depth about why there isn't an analytical solution, ...
- 299
2
votes
What frequency / quality for voice clips?
Let's start with sound quality. Where are you setting the bar? Do your audio clips need to be simply clear and understandable, or do you want them to sound like a Hollywood voiceover? If it's the ...
- 331
2
votes
How do I shift the frequency of a track by x Hz?
Binaural Beats is a psychoacoustic phenomenon that occurs between 2 frequencies as perceived in a binaural space. To contrast - in a piece of music, you are listening to not only infinite number of ...
- 475
2
votes
How do you change the equalisation of an individual song/audio?
The way it’s worded it might not be suitable but I’ll give it a shot anyway.
What you want is a 5 band parametric equalizer.
There are plenty of DAWs that have them.
A fully parametric equalizer (...
- 1,000
2
votes
Does the .wav file created from a .mp3 file have better quality than the .mp3 file itself?
You cannot get detail from nothing
Even though WAV files can hold more detailed sound, that doesn't mean they always do. Converting from MP3 to WAV would be one such scenario, the converter cannot ...
- 121
2
votes
Accepted
What's the lowest analog audio sound that a CD/44.1kHz audio system can make?
You can encode any frequency down to 0 Hertz (DC signal) in the digital signal. Most real-world recording and playback systems will not go this low unless you modify them in some way. The frequency ...
- 1,519
2
votes
Accepted
Why can I hear this beep at 6 kHz and others cannot?
I listened to the file several times and couldn't hear it. In a spectrum analyzer, I can see what you're referring to. It's at -90 dB, so you'd have to crank up the volume pretty far to be able to ...
- 1,578
2
votes
Subliminal messages in MP3
that claims to have embedded in them messages at a frequency that
people cannot hear
That's an odd claim to make. Subliminal messages can be done in video: the theory is that you can show a message ...
- 1,578
2
votes
Accepted
Microphone with wider frequency range or higher sensitivity for better qualtiy?
You cannot choose based on those numbers alone.
Though 50Hz - 15kHz might seem a little limited, if all you are recording is spoken word, then it's sufficient. The values alone don't give any ...
- 8,405
2
votes
Accepted
Change audio's frequency, but still sound similar
What you are dealing with is the sampling frequency or sampling rate of your audio files. And what you want to achieve is called sample rate conversion.
There are many software that can deal with this ...
- 2,834
2
votes
Accepted
What's the point of drivers that can produce frequencies that humans can't hear?
In my humle mind it is purely marketing. People tend to buy on specifications, and bigger numbers sort of makes the user accept a higher price and hence a higher profit for the seller.
There can be a ...
- 1,519
2
votes
Split audio by frequency
Solution with sox:
HZ="2700"
sox inp.wav "$HZ"-.wav lowpass $HZ
sox inp.wav "$HZ"+.wav highpass $HZ
sox -M "$HZ"-.wav "$HZ"+.wav out.wav
- 19
Only top scored, non community-wiki answers of a minimum length are eligible