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Pocket RTA Spectrum Analyser for the iPhone, Pocket RTA HD for iPad also now available
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The FREE Spectrum Analyzer You Should Know About - SPAN by Voxengo
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Spectrum Analyzer apps
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Spectralissime - PC Audio Spectrum Analyzer - gratis, bisa mengukur SPL Audio, weighting dBA & dBC
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Audio Spectrum Analyzer on the Cheap (032 )
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Measure Frequency Response using Smartphone Apps
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3 tech tools I've NEVER regretted buying
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Octave RTA for iPhone and iPad
