project intends to realize an universal video effect device by
making my graphical visualizer
Base Hardware Units
Spartan 6 FPGA board
The Trenz Spartan 6 board is used
to implement a graphical visualization of the incoming
digital audio. The board analyzes the digital audio data from
S/PDIF or UART. Mouse and keyboard control is available too.
is converted to MIDI-like information using my
transform algorithm. Various information from several channels
are extracted in order to control the parameters of the visualizer.
Graphical Audio Visualizer
First approach of real time audio visualization with NIOS.
The system was able to render between 10 to 20 simple frames
in real time.
The VGA interface with dithering is
used to generate a HD-like signal of 1920x1080 resolution with
a refresh rate of either 50Hz or 60Hz. Also 1600x1200 resolution
is possible. The smaller format of SXVGA 1280x1024 can be run
up to 120Hz.
See my VGA-Core project at
did it in the former version, the analysis is not performed
by a FFT, but a discrete transformation of selected frequencies
using optimized adjustable filters, which is more precise
and reacts quicker on level changes.
data is thus used to create visual effects in real time.
The new platform will be the Digilent Nexys with digital Video and
Audio using an Artix 7 device.
here to see the former version of the visualizer