By opening the “Plot Spectrum” window under the “Analyze” menu, we can visualize the audio frequency spectrum calculated via an FFT: In this case, we have an “F” in the clear for analysis. If I can find a relatively clear section of audio in a recording that sustains a single note, Audacity’s “Plot Frequency” analysis tool can tell me exactly what I need to know.Īs an example, here is a screen shot of Audacity displaying a section of Jimmy Smith’s recording of “The Cat” ( Jimmy Smith, The Cat): With the free digital audio tool “Audacity” ( Audacity audio software site) I no longer have to guess at drawbar settings. As an organist who took lessons early in life on a Hammond B3, played in rock bands using a chopped M2 with percussion added, and now plays services on a model 906, I can’t avoid trying to guess drawbar settings whenever I listen to someone play a Hammond organ. ![]() This month’s digital recording tool excursion is into the realm of frequency spectrum analysis.
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