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Results tagged with audio
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user 4602
Audio, or in terms of signal processing, an audio signal is an analog or digital representation of sound, typically as an electrical voltage.
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278
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Programming Wavelets for Audio Identification
If a wavelet is an array of these pairs, how is it applied to the audio data?
How does this wavelet apply to the analysis when using an FFT? …
- 679
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2
answers
327
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Determining instruments in audio data
What exactly is one looking for in audio data to find different instruments or energy sources? …
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2
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692
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Preparing audio data for FFT
I would like to experiment with some input from a microphone and am receiving a 2 channel, 512 samples buffer in real time
I know the signal could be passed through a low pass filter, and then window …
- 679
4
votes
1
answer
363
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Combining time domain and frequency domain data for BPM detection in real time
I would like to write a BPM detector. Does either of the domains provide more information for this type of analysis?
What exactly is being looked for in the data to detect onset for BPM detection in …
- 679
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2
answers
222
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Wavetables and Partials
I am reading Direct Synthesis versus Wavetable Synthesis. The quote below explains code I have read but I don't get why it's a division by the integer multiple, when multiples increase in frequency. D …
- 679
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2
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127
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Controlling audio high/mid/low in frequency domain
Is it a realistic mapping to divide the frequency bins in 3 parts, high/mid/low frequencies?
How can these bins then be manipulated to control the level of these bands in the time domain?
Is it suff …
- 679
0
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1
answer
455
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Using Chebyshev polynomials in wavetables
How are Chebyshev polynomials used in wavetables for audio synthesis? I dont understand how to store these inside wavetables? … How does the synthesized audio result in matching to the correct index in the wavetable and what part of the Chebyshev polynomials are actually stored in the wavetable? …
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1
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91
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Audio Beat Divide
How exactly is beat division applied to a signal?
Does the rhythm need to be detected or can just the onset be manipulated?
For rhythm detection is it better to look for patterns in the frequency do …
- 679
14
votes
2
answers
4k
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Learning roadmap for the audio signal processing beginner
I would like to know a rough roadmap, so to speak, to follow in order to successfully learn audio signal processing. … It feels to me like audio signal analysis is only one part of the overall knowledge needed. Where other topics are music theory, audio engineering and programming. …
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3
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2
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4k
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What does the phase of a FFT bin of an audio signal represent?
What exactly can the phase of the frequency bins be used for in regards to audio? What does it represent? … Would that be used for audio identification, e.g. matching amplitude and phase pairs within the same bins of different audio segments? …
- 679
4
votes
2
answers
240
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Processing signals with phantom fundamentals
Is there a formula to calculate the frequency of a phantom fundamental based on the harmonics, and would this formula be applied directly to the energy bins of an FFT?
- 679
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Prerequisites for audio signal processing
It seems like a solid understanding of Calculus and Probability Theory is needed to properly grasp the subject and to be able to be creative with it in the audio field. …
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2
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7k
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Energy of an audio signal
E.g. what if an audio signal has high energy on the higher frequencies and another has high energy on the lower, bass, frequencies, how is this determined? … What exactly is the power from the square summable series representing then and is it useful for audio? …
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1
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3
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433
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Aliasing in wave-scanning oscillator
What are ways to be able to play the audio file at any frequency without aliasing? … Will scanning an audio file at higher frequencies cause aliasing due to index jumping, or is it rather precision loss? …
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2
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261
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Adding Bass to a signal
How can bass/low end be added to a signal?
With a low-pass filtered sub-oscillator running at an octave or two below the signal, there still doesnt seem to be enough bass.
Is there a mathematical fu …
- 679