Questions tagged [audio-aliasing]
5 questions
8
votes
1 answer
Applying Fourier Transform on Time Series data and avoiding aliasing
I am willing to apply Fourier transform on a time series data to convert data into frequency domain. I am not sure if the method I've used to apply Fourier Transform is correct or not? Following is the link to data that I've used.
After reading the…
Furqan Hashim
- 1,304
- 2
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4
votes
1 answer
Rendering very high frequency sounds on iOS
I'm trying to use AudioUnit to render a range of high-frequency sounds for a iPhone project (on the order of 8-20KHz), but everything above 12KHz comes out heavily distorted and/or completely the wrong tone. I've rendered the waveforms to an image,…
David Cairns
- 603
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3
votes
1 answer
Sound sampling at low frequencies
I've actually posted this question before, but it hasn't been answered. Maybe I wasn't clear enough, so let me rephrase:
As you know, when you're sampling a signal at a certain sampling rate, any frequency that's higher than half of the sampling…
Ee Zz
2
votes
3 answers
Algorithm - return aliasing frequency
In Python, I'm trying to write an algorithm alias_freq(f_signal,f_sample,n), which behaves as follows:
def alias_freq(f_signal,f_sample,n):
f_Nyquist=f_sample/2.0
if f_signal<=f_Nyquist:
return n'th frequency higher than f_signal…
user3558855
- 303
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-1
votes
1 answer
Easiest Way to Implement a Z-1 Unit Delay Function for Audio/DSP?
I am working on rebuilding some distortion units from Reaktor based on Infinite Linear Oversampling which is a technique to reduce aliasing. It involves integrals of the distortion equations with unit delays. Here's an example of a…
mike
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