| A testsignal generator for audio applications in an FPGA | |||
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Test Signal Generator |
Test Signal Unit This module uses additive sound synthesis by superimposing several sine waves, matching the intended generator frequency. The principle corresponds to the Fourier analysis and LaplaceTransformation, according to which it is possible to generate nearly any waveform imaginable from simple sine waves. The first module was used in an industrial application to generate waveforms for super sonic waves in parallel.See the page here: Additive Frequency Synthesis Here I am using it as a LaPlace waveform generator to generate band-limited signals as test wave forms for audio circuits. Up to 31 waves can be generated. Hardware  The module works up to 120 MHz and runs on a current Cyclone III FPGA. Wave Synthesis  Complex Wave from super imposed sine waves  Complex Wave from super imposed sine waves, actually a band limited saw tooth Dynamic Wave Table Synthesis In a modified version, I am using 7 waves to create harmonics in order to build the desired music wave. Using several of these waves, a virtual wave table processing is possible by walking through these waves dynamically. See the new Wave Table Module and the old Wave Table Module Read about the detailled function in this article Wave Synthesis
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Full Synchronized Operation 44,1 kHz 48 kHz 88,2 kHz 96 kHz |
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96 kHz Audio DSP |
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© Sound of L.A. Music Productions 2008