All Questions
55 questions
1
vote
0
answers
66
views
Failing to detect clip in audio file
I am trying to find all the locations of a drum clip in a piece of audio. This drum clip is a digital sample that is repeated at intervals. I have had reasonable success at removing the clip ...
- 294
0
votes
1
answer
42
views
How to convey a music album that traverses the listener through ambisonic space arriving to each "SONG" (stereo/non spatial)/sound souce?
Im reframing how to present my next album to the listener......(Incoming Laymen)
Imagine you're hearing stereo audio file "Song 1/Track" this POV is non spatial, .wav .mp3 audio file. ...
- 1
0
votes
1
answer
84
views
How can I use a constant Q transform to detect low frequencies without making the buffer size too large?
I am trying to write code to detect musical notes within a signal. I have been reading up on different methods for extracting frequency information out of a signal to determine which notes were played ...
- 327
0
votes
2
answers
371
views
confusion understanding/interpreting power spectrum of audio in MATLAB?
Please find attached snapshot. I am confused regarding power spectrum in MATLAB as according to google definition in attached snapshot"the distribution of the energy of a waveform among its ...
- 1,952
1
vote
1
answer
474
views
DSP function used by musical distortion plugins
In short: what kind of mathematical function was applied to this sine WAVE?
I am trying to implement my own distortion plugins. Amongst other things I have read several chapters of Will Pirkle's book (...
- 113
1
vote
1
answer
202
views
Relation of pitch to frequency?only with fundamental frequency or also with harmonics?
How is pitch related to frequency.? If there is a pitch for a fundamental frequency, will that pitch be same for harmonics?
- 1,952
0
votes
1
answer
61
views
Is it correct to say that increasing the sampling frequency is same as compressing the duration of an audio signal in MATLAB?
I am trying to read and play with an audio signal in MATLAB. I have coded below
clear
[y,fs]=audioread('guitartune.wav');
sound(y,fs)
This audio clip'guitartune....
- 83
1
vote
3
answers
122
views
Why mixing two sines sounds like a triangle?
I'm not sure where to post this question that is related to audio synthesis through programmation.
More specifically, I'm using a library called synthplayer that implement basic synthesizer in Python.
...
- 111
1
vote
2
answers
538
views
Audio compressor delay/lookahead
I am making a real-time audio compressor/limiter. I am in little doubt about the delay. What is typical delay times for a compressors or limiters delay/lookahead time?
Most other compressors I see don'...
- 169
4
votes
3
answers
1k
views
How to detect repeating music?
Suppose you have a music data-file (for example mp3) with a single audio stream which contains an audio time-series for 3 hours, but you want to find out if that audio file (maybe some compilation) ...
- 141
3
votes
3
answers
327
views
What is difference between frequency and pitch?in nutshell and simple words?
Although both are some how directly related
Such that when one increases,the other one also increases
I have read different Google results but couldn't understand .
I want to know what is exact ...
- 1,952
0
votes
1
answer
145
views
Is it possible for Matlab to read and decode an mp3 file?
I have run the following Matlab code and I got a signal as shown in the Figure below.
...
- 31
3
votes
1
answer
144
views
Shazam / SoundHound Music Analysis - Recommendation for Reading
I need to explore some area around music frequency analysis.
A good example is the way Shazam / SoundHound app works (mapping frequency domain, comparing, creating some vector map, handling noises and ...
- 141
-1
votes
3
answers
207
views
How to compute key of a song?
I'm looking for a precise way to compute the key of a song. BPM would be cool too. Analog is ok. I tried to approach it from the DFT angle, but got stuck and can't really put a finger on what's the ...
DAWwave
3
votes
3
answers
380
views
How can I convert audio to a series of notes using pitch detection?
I have a good pitch detection system set up, and I would like to return a series of notes given an array of audio samples.
My current approach is as follows: I have a moving window across the audio ...
- 31
0
votes
1
answer
193
views
extend parts in an existing audio file to make it sound longer without stretching the file
I'm looking for a way to extend certain parts of an exiting audio file to make these parts sound like the where played longer. And I dont want to change play speed or stretch the file.
Lets say u have ...
- 3
2
votes
0
answers
74
views
Digital vs Analog music [closed]
What are the different constraints for mastering audio content for either Vinyl or CD?
By the way, I'd like to know if there're any papers or documents, with a comparison between different digital ...
user35663
2
votes
1
answer
274
views
How many psychoacoustical critical bands are there?
I understand that the human ear works as a band-pass filter and I have doubt regarding the number of such bandpass filters in the filter bank.
I came across these two possible explanations of how it ...
- 69
0
votes
1
answer
723
views
How does it go about implementing pitch shifting without affecting the duration or speed on matlab? [closed]
I am creating a project that will record a sound sample from the world, for example, a bird's chirping. And then through pitch scaling, I could create different notes.
I first tried to change the ...
- 47
4
votes
1
answer
850
views
Algorithm for identifying beat grid in music with non-constant tempo
Are there any algorithms for automatically fitting a beat grid to a song (tempo matching) when the song has a slowly changing tempo or BPM?
The output would be a vector of onsets.
Here's a picture ...
3
votes
0
answers
302
views
Gain of resonating filters
I'm trying to make a music instrument based on a resonator with a high Q, such as Ableton's Corpus and Ableton's Resonator (I think the former is based on a simple 2nd order resonant filter while the ...
- 754
1
vote
0
answers
128
views
Fastest way to subtract known music tracks from live videogame audio stream
I want to isolate video game "action" sounds from the video game soundtrack. Given all ~20 songs, I'd like to filter them out from any live audio stream during gameplay.
What is a fast and robust way ...
- 111
2
votes
3
answers
1k
views
Distribution of energy in frequency bands
On my wav-file (music), I do a short-time Fourier transform (STFT). I have spectrum, which spans from $0\textrm{ Hz}$ to $f_s/2$. I took out the range between $1$ and $1000\textrm{ Hz}$, which I ...
- 21
1
vote
2
answers
2k
views
Method for calculating musical note-based magnitude spectrum
My specific question is: is there a standard way to do the kind of analysis I describe below? If not, is there a useful method that I have missed?
I'm exploring ways to produce a spectral histogram ...
- 113
3
votes
3
answers
394
views
Which parameters should I take care of while converting .au to .wav for Genre Classification
I am learning to develop Music Genre Classification models. I have a dataset in which files are in ".au" format, which I need to convert into ".wav". I used SoX (Sound eXchange) to convert it. With a ...
- 133
1
vote
1
answer
127
views
One-bit depth audio
I have a music player which is only able to play sound with one a bit-depth of one. I can produce this by taking a song and simply boosting the signal $+100\textrm{ dB}$.
Is there another approach ...
- 175
1
vote
1
answer
84
views
Spectral plot shows more notes than there really should be
I was experimenting with sound analysis lately and from what I see when I plot spectral data of an audio file is that apart from notes that were actually picked there are some other notes with quite ...
- 143
1
vote
2
answers
1k
views
Sampling frequency of audio
Based on what we choose sampling frequency when sampling some song? Do we use Nyquist–Shannon sampling theorem, or maximum sampling frequencies are pre-defined, so it will never come to aliasing ...
user20705
5
votes
2
answers
2k
views
How does Adobe After Effects generate its "audio spectrum" effect?
I'm trying to replicate the "audio spectrum" effect from Adobe After Effects. An example can be seen in this video:
Obviously, it has to be some variant of a fourier transform, but I've tried taking ...
- 51
2
votes
2
answers
3k
views
Integration of square wave
trying to program an integrator. My input is a square wave and my expected output should be a triangle wave. However, whenever I pass it through my low pass filter algorithm (just a 2nd order ...
- 209
1
vote
2
answers
168
views
What is a note?
That simple. What is a note in digital signal processing? Is it a single value of y[n] in a system with a difference equation e.g. ...
- 367
0
votes
0
answers
48
views
Distinguish between two vocals by their timbre
Right now I'm working on a signal processing project, I'm not quite to the point where I'm implementing the DSP algorithms yet (still working on the low level hardware) although I'd like to get an ...
- 101
1
vote
4
answers
369
views
Algorithm for testing input sound for multiple expected notes?
** originally I asked this question on stack exchange and was pointed to dsp.stackexchange **
I need to determine when the correct musical notes (from a piano) such as in a chord are being played. ...
- 133
0
votes
2
answers
180
views
Can software distinguish between different musical instruments
If possible, I would like to write a little script that can identify different musical instruments from just a recording. Apart from variations of amplitude and frequency over time (which can be ...
- 105
0
votes
1
answer
488
views
efficient triangle to sine morphing?
I'm coding a synthesis external for MaxMSP in C.
It's based on Peter Blasser's bounds and bounce concept ( http://petermopar.blogspot.co.uk/2014_04_01_archive.html )- basically triangle waves with ...
- 103
0
votes
1
answer
592
views
MATLAB flanger...zipper noise, crackling, help with interpolation values?
i'm writing a batch script in MATLAB to flange.
i'm getting some periodic noise, and i'm having trouble tracking down the source. it's definitely in the algorithm, because soundsc() will scale ...
- 1,143
2
votes
2
answers
4k
views
What is the difference between pitch detection and Onset detection?
According to wikipedia Onset detection:
Onset refers to the beginning of a musical note or other sound, in
which the amplitude rises from zero to an initial peak. It is related
to (but ...
- 125
1
vote
3
answers
863
views
how can I analize music as spotify/musixmath/shazam does?
I mean, does exists some state of the art algorithm able to extract music features, classify them and identify similar music or find lyrics?
I know that there are many topics or steps involved on my ...
- 109
5
votes
2
answers
5k
views
Does audio upsampling create noise/artifacts or degrade the signal?
I've read that upsampling performed in digital music playback can color the sound, produce artifacts, etc. For example, an audio file ripped from a CD might be 44.1Khz/16-bit, and then upconverted to ...
- 153
9
votes
1
answer
2k
views
Detecting changes between voice and music
I have a bunch of audio files that have both speech and music parts (think radio). For instance, a given file might consist of the following sections:
...
- 203
2
votes
2
answers
122
views
is there a second order approximation to perceived loudness
Quoted from this
As a first order approximation it takes ten times the energy to double the perceived loudness
So is there a 2nd order approximation. If so then how much change in RMS value ...
- 207
0
votes
2
answers
2k
views
Comparing the loudness of two samples
I have two wave files each containing a sample of a note. I wish to compare, using a program, each sample and present how loud the first sample is with respect to the second if each sample is played ...
- 294
0
votes
4
answers
185
views
Tune a piece of music
Suppose I have an instrument which is out of tune. For example lets say, as an example, the notes it plays are as follows: C+20 cents, C#+20 cents, D+20 cents D#+20cents etc. In other words, it plays ...
- 294
2
votes
3
answers
1k
views
synchronizing two music tracks
I would like to synchronize two different music tracks (and maintain synchronization) as a DJ would with two records.
So far, I have the beats mapped for each song, so I am able to adjust their rates ...
- 46
1
vote
3
answers
6k
views
Easiest Beat Tracking Algorithim
I want a relatively easy to implement but relatively reliable algorithm for detecting beat locations in an audio file.What I am aiming to do is get the location of the closest beat to a particular ...
- 326
2
votes
1
answer
294
views
Detecting presence of music in ambient sound
I am hoping to create an application that would listen to ambient sound and detect if music is being played. It is not important to identify the music being played; just detecting that some music is ...
- 121
1
vote
1
answer
667
views
Detection of regions of voice in music
I want to detect the regions of voice in a song. Currently, I am using the fact that the vocals in the song are recorded as center panned. So, I am removing all center panned audio from the song. ...
- 111
3
votes
1
answer
373
views
How can frequency dispersion in a vibrating string be modelled using an LTI filter?
According to JOS on stiff-string synthesis, stiff strings (like on a piano) introduce inharmonicity (i.e. the harmonics of the tone are not all in tune) due to different frequency components of the ...
- 1,453
4
votes
3
answers
369
views
Harmonic errors in acoustic instruments
If a note has a fundamental frequency of 100Hz, then its second harmonic is located at 200Hz and its tenth harmonic is located at 1000Hz. But for acoustic instruments, the harmonics will not occur at ...
- 294
15
votes
4
answers
17k
views
Most efficient way to extract frequency components of audio signal with near-human accuracy in real time
I'm trying to work out how (if possible) to extract the frequency components of an arbitrary audio sample (typically music) in an FFT-like manner, but in my research on the FFT algorithm, I'm learning ...
- 1,453