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 ?

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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.