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Downsampling (signal processing) - Wikipedia
https://en.wikipedia.org/wiki/Downsampling_(signal_processing)#:~:text=This%20factor%20multiplies%20the%20sampling%20interval%20or%2C%20equivalently%2C,component%20that%20performs%20decimation%20is%20called%20a%20decimator.
Is there any deterministic downsampling algorithm for audio?
https://dsp.stackexchange.com/questions/75703/is-there-any-deterministic-downsampling-algorithm-for-audio
audio algorithms downsampling decimation. Share. Improve this question. Follow asked Jun 9 '21 at 12:09. neel g neel g. 115 5 5 bronze badges $\endgroup$ 1 $\begingroup$ Resampling algorithms tends to be deterministic unless dithering is applied. They are often time-variant in that one sample of shift in input produce a different output.
Upsampling and Downsampling - Stanford University
https://ccrma.stanford.edu/~jos/JFB/JFB_2up.pdf
Downsampling (Decimation) •Diagram: x yN •Basic Idea: Take every Nth sample. •Time Domain: y= DownsampleN(x), i.e., y[n] = x[Nn],n∈Z •Frequency Domain: Y = AliasN(X), i.e., Y(z) = 1 N NX−1 m=0 X z1 Ne−jm 2π N ,z∈C Thus, the frequency axis is expanded by factor N, wrapping Ntimes around the unit circle and adding.
algorithm - Downsampling an audio signal, removing outlier ...
https://electronics.stackexchange.com/questions/592876/downsampling-an-audio-signal-removing-outlier-values-due-to-transistional-spike
Downsampling an audio signal, removing outlier values due to transistional spikes in the signal. Ask Question Asked 2 months ago. Active 2 months ago. ... Browse other questions tagged signal-processing algorithm or ask your own question. The Overflow Blog How to defend your attention and find a flow state ...
wave - Downsampling PCM Audio - Signal Processing Stack ...
https://dsp.stackexchange.com/questions/19140/downsampling-pcm-audio
function interleave (left, right) { var length = left.length + right.length; var result = new Float32Array (length); var _index = 0; for (var index = 0; index < length;) { result [index++] = left [_index]; result [index++] = right [_index]; _index++; } return result; } function convertToPCM (raw) { var output = new Buffer (raw.length*2); for (var i = 0, offset = 0; i < raw.length; i++, offset += 2) { var s = …
Downsampling and applying a lowpass filter to digital audio
https://stackoverflow.com/questions/238382/downsampling-and-applying-a-lowpass-filter-to-digital-audio
This turns out to be proportional to the "sinc" function (sin at)/at, where a is the width of the box in the frequency space. So at every 4th location (since you're downsampling by a factor of 4) you can add up the points near it, multiplied by sin (a dt) / …
What is the ideal downsampling algorithm? : AdvancedProduction
https://www.reddit.com/r/AdvancedProduction/comments/cctyso/what_is_the_ideal_downsampling_algorithm/
Downsampling is two phase process. The actual sample rate change and reconstruction filtering. The first step is always the same. The second part has a theoretical optimum - perfect (rectangular) cut as transfer function in frequency domain which in time domain has impulse response that is infinite and equal to the sin (2pi * new_nyquist * x)/x ...
Let's talk about Windows audio downsampling of high sample ...
https://www.reddit.com/r/headphones/comments/78qpgy/lets_talk_about_windows_audio_downsampling_of/
So, instead of using Windows DirectSound resampling algorithm, I've just resorted to downsampling the audio to 24/44.1 or 24/48 using sox algorithm, which is audibly transparent. At least this way, the resampled files (a total of about 20 albums, so not many) is guaranteed not to have any ringing or aliasing artifacts that would muck up the listenable frequencies.
GitHub - haoel/downsampling-algorithm: downsampling time ...
https://github.com/haoel/downsampling-algorithm
You can go to the ./build/data/ directory to check the diagram and the cvs files. The diagram picture as below. The first black chart at the top is the raw data with 7500 points. The second, third, and fourth respectively are LTOB, LTTB, and LTD downsampling data with 500 points. The last one at the bottom just put all together.
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