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 ...
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  • 7,059
10 votes
Accepted

What is the "level" of Frequency Modulation of many synthesizers?

Very good question. I found nothing about it in the manuals. It seems I'm missing some knowledge that the creators of FM8 and Ableton's Operator share and use. So, my question is how do synth makers ...
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  • 703
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 ...
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  • 1,548
7 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 ...
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  • 2,030
6 votes
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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 ...
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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 ...
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  • 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 ...
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  • 8,454
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 ...
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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.
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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 ...
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  • 7,059
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-...
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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. ...
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3 votes
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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 ...
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  • 2,613
3 votes
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Feedback loop frequency

Do you mean in livesound situations? If so, it depends on soo many factors that it is impossible to give a average frequency range. But something i noticed when working with a band that only use in-...
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3 votes
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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 ...
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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 ...
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  • 1,553
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 ...
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  • 8,454
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 ...
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2 votes

Is bass boost harmful?

As someone who comes from a sound company, the only way you can be sure that it would negatively effect the headset or headphones in said question is whether it would pass the specification of the ...
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  • 21
2 votes

Formula for the sound pressure of a pure tone

This was a question asked in a Digital Sound and Music exam which has been copy-pasted here (even the "ex-pressed" has been left intact). The question only gives two marks. I think this is the answer: ...
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2 votes

How to do frequency or spectral subtraction of two audio tracks?

In the case where your two audio signals S1[n] and S2[n] are of same length, and we are speaking of discrete time, discrete value signals, the DFT being a linear transform : DFT (S1[n] - S2[n]) = ...
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  • 2,613
2 votes

standing waves in strings

Let's use some simpler numbers to illustrate the problem. Let's say the smallest string on a piano is 1m, and has a frequency of 200hz (it's a piano for giants). And let's say the lowest note on a ...
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2 votes
Accepted

How to shift frequency of whole audio file?

That operation is indeed called frequency shifting. It can be achieved with a Hilbert transform. How is described in this article – pretty easy to code it up yourself in any DSP language of ...
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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, ...
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  • 299
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 ...
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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 (...
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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 ...
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  • 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 ...
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  • 1,254
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 ...
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  • 1,548
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 ...
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  • 7,059

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