XS1-G-DK (XDK) XMOS, XS1-G-DK (XDK) Datasheet - Page 6

• Manufacturer Part Number: XS1-G-DK (XDK)
• Description: KIT DEV 4CORE G4 W/LCD TOUCH
• Manufacturer: XMOS
• Series: XCore™r
• Type: MCUr

Specifications of XS1-G-DK (XDK)

• Contents: Board, Cables, CD
• For Use With/related Products: XS1-G4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 880-1012

XK XS1-G Development System Quick Start Guide (1.1)
The FREQ program reads audio input, and visualizes the power in each frequency
The horizontal axis of the screen is time, and the vertical axis represents the
worth of audio.
2.3 Audio Frequency Analyser (FREQ)
band in real-time on the screen. Connect a microphone or MP3 player to the line
input to run the program.
frequency bands. The sound intensity is represented by colorâ ˘ A ˇ T dark colors indicate
little power in the band, and bright colors indicate high power. The power spectrum
is updated in real-time using a sliding window, which represents about a second
Internally, the program computes a 512-sample FFT, and uses a lookup table to map
the magnitude of each frequency onto a color. The FFT is computed 200 times per
second with a 75% overlap—128 new samples are appended to 384 of the previous
samples and the FFT is computed over these 512 samples. The real and imaginary
components are squared and summed, the sine and cosine parts are then added,
and the resulting value is used to lookup a color.
XCORE1
XCORE0
Buffer
www.xmos.com
Buffer
Audio
Codec
Client
ADC
DAC
XCORE2
XCORE3
FFT
LCD
Driver
LCD
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