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  1. Superpowered Audio SDK
  2. Frequency Domain

Frequency Domain

Transformations

  • I tried the FrequencyDomain Example and now I would like to get the raw data
  • If I look at SuperpoweredFrequencyDomain example, I understand that the data is in the buffers of the callback function. Am I correct?
  • Is it possible to have the SuperpoweredFrequencyDomain obj apply a windowing function (Hamming for example) on time-domain data before doing the FFT?
  • Should one timeDomainToFrequencyDomain() call are required after one addInput() call?
  • We currently fetch audio from iPhone’s in-build microphone and on it we have to apply FFT filtering.
  • What are the numbers I receive means during the Frequency Domain work?

Tips and Ideas

  • Can I do a power spectrum through superpowered sdk?
  • Does it make sense to apply a filter before I am in the frequency domain?
  • I want to find the dominant frequency of the signal and to print it out as a number. How can I do this?
  • I would like to build a simple but precise guitar tuner. Can this library be useful for creating simple and precise guitar tuner?
  • I'm wondering if the SDK has built in pitch detection?
  • Is it possible to detect offline sounds (not speech) like alarm or barking dogs with your SDK ?
See all 7 articles

FFT

  • Can you tell me more about applications of your polar FFT?
  • I'm curious how I would go about adding the mono input (received from SuperpoweredIOSAudioIO by setting numberOfChannels to 1), or if I should combine the stereo channels at some point before or after the FFT.
Superpowered Audio SDK