Audio Signal Visualizer with Cylcone 4 FPGA

audio visualizer with Cyclone 4
	Cyclone IV 48kHz 96kHz 192kHz 384kHz sample rates 1280x1024 VGA 1600x1200 VGA / DVI 1920x1080 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 a graphical visualization of incoming audio. The board is attached to both a stereo audio codec chip and high speed ADCs and DACs which are used for signal observation during development process e.g. monitoring signal at a physical oscilloscope. The analog audio is down sampled to 384 kHz for highest precision. The VGA interface is used to generate a HD-compatible signal of 1920x1080 resolution with 60Hz refresh rate. See the VGA Core Project on www.mikrocontroller.net Graphical Visualization 1920x1080x60 video format showing the visualization of the keyboard input. The audio analysis is performed by the audio2midi-unit of the FPGA-DSP. A Görtzel-algorithm is used to analyze the audio. Simultaneously it is monitored at an analog oscilloscope via the built in DACs. Audio data rates of up to 384 kHz are accepted! click here to see the also the graphic equalizer click here to see the also the graphic digital mixer