Audio Spectrum Analyzer with Cylcone 4 FPGA

audio spectrum analyzer with Cyclone 4
	Cyclone IV 48kHz 96kHz 192kHz 384kHz sample rates 1280x1024 VGA 1600x1200 VGA / DVI 1920x1080 HDMI 48kHz 96kHz 192kHz 384kHz Audio DSP	Base Hardware Unit Altera Cyclone IV + ADC/DAC board The Altera Cyclone 4 DE2-115 from Terasic is used to implement and test the parts of the AUDIO DSP. The board is attached to both an on board stereo audio codec chip and additional high speed ADCs and DACs which are used for signal observation during development process. Also it contains a video interface to VGA/HDMI to directly monitor spectral audio responses as used in a graphical equalizer. The VGA Core of Spartan3 is used. Graphical Spectrum Analyzer A large scale graphical Spectrum Analyzer with 192 band Görzel FFT compressed to 48taps with direct VGA output to a 1920x1080 TFT monitor (Samsung TV) with Altera C4 FPGA. Also DVI 1600x1200 is available with the Altera HDMI adapter. The amplitude resolution is 0,1 dB and better. The sound patch shown in the example was created with my old E-mu Orbit 2 + Access Virus B. Live recorded with 1024 times oversampling (96MHz Sigma-Delta ADC at 16 Bits) with nearly 21 Bits analog audio quality effectively. The frequencies can be trimmed to the music frequencies like shown here. Detailed view of resolution: First Version of the Graphical Analyzer: Alternative Screen with the Visualizer-Option: click here to see the former version