The wave tag has no wiki summary.
1
vote
1answer
100 views
What do I do with the result of an FFT?
So I am working on a project using digital signal processing, which I am not familiar with at all, and a lot of this is all new to me. I am using SciPy\NumPy to play around with code to understand the ...
0
votes
1answer
32 views
In a periodic square wave, how to change in a particular condition?
The periodic square wave,
$$x(t) = 1, |t| < T_1 \\
x(t) = 0, T_1 < |t| < T/2$$
What I wonder is ..
(1) If $T_1$ is constant and $T \to \infty$, is x(t) a constant function?
(2) If $T_1$ is ...
2
votes
1answer
77 views
How to make pop-free, crisp two-beep ringtone?
I hope this ultra-noob question is not entirely out of place here.
I'm trying to make a super simple ringtone: 0.5s silence + 1s "pure tone" + 0.5s silence + 1s "pure tone" + 0.5s silence. By "pure ...
0
votes
4answers
269 views
How to generate a good Sinus audio signal of specific SampleRate, DataBits and Chunnels in a time frame
I encountered a problem when I tried to generate by a program an sinus audio signal.
My parameters are
Sample Rate: 44100 Hz
Data Bits: 16 bits
Channels: 2
I need to create a WAV file ...
1
vote
1answer
215 views
time in Sine Wave equation
According to Wikipedia,
The sine wave or sinusoid is a mathematical function that describes a
smooth repetitive oscillation.
The formula for the Sine wave is,
A = Amplitude of the Wave
ω = ...
7
votes
1answer
125 views
Recognizing data clustered into shapes
I am working on a project in Python to detect and classify some bird song, and I have found myself in a position where I need to convert a wave file into frequency vs. time data. This hasn't been too ...
3
votes
2answers
79 views
Understanding values saved in WAVE file
The values that one can find in a wave file, e.g.
0.0036
0.0026
0.0174
0.0050
0.0026
0.0108
0.0154
-0.0114
-0.0006
0.0115
...
8
votes
3answers
554 views
Determining Frequency and Period of a wave
I'm gathering temperature data from a refrigerator. The data looks like a wave. I would like to determine the period and frequency of the wave (so that I can measure if modifications to the ...
3
votes
1answer
242 views
Why does a wave continuously decreasing in frequency start increasing its frequency past the half of its length?
I'm trying to programmatically generate a wave (sine or square) with a continuously decreasing frequency.
To do so, I simply multiply the starting frequency for a decreasing value, that linearly goes ...
3
votes
1answer
78 views
Procedural wave generation, frequency shift issue
sorry for the long post but I want to try and get all the details in here in hopes it will help.
I've been working on building a procedural audio system for use in XNA projects. First this is general ...
2
votes
1answer
84 views
Problem reading and rendering Spectrum
I'm now processing PCM codes extracted from .wav file and want render the spectrum myself. First I try to read a spectrum on my foobar2000 player as below.
My problem with this spectrum is: what do ...
4
votes
2answers
185 views
WAV encoding problem
When processing wav files, I encounter this problem: the what I extract PCM from a 8-bit encoded .wav file, I got a sequence of integers. However, when verifying my implementation with ...
3
votes
1answer
210 views
Mathematics / Signal theory behind billiard ball 'wave pendulum' effect
This YouTube video shows a very interesting effect.
What is the underlying science?
I have recently started studying Fourier theory and DSP, and and trying to understand what is going on in terms of ...
