P0304 Terasic Technologies Inc, P0304 Datasheet - Page 24

• Manufacturer Part Number: P0304
• Description: DE2-70 CALL FOR ACADEMIC PRICING
• Manufacturer: Terasic Technologies Inc
• Type: FPGAr

Specifications of P0304

• Contents: DE2-70 Board, Power Supply, Cables, Plastic cover and software
• For Use With/related Products: Cyclone II 2C70
• For Use With: P0033 - BOARD ADAPTER HSMC TO GPIOP0006 - BOARD ADAPTER THDB-SUMP0001 - MODULE DIGITAL CAMERA 5MP (D5M)P0307 - KIT DEV 4.3" LCD TOUCH PANEL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DE2-70

3.8 Audio Playing and Recording
This interesting audio tool is designed to control the audio chip on the DE2-70 board for audio
playing and recording. It can play audio stored in a given WAVE file, record audio, and save the
audio signal as a wave file. The WAVE file must be uncompressed, stereo (2 channels per sample),
and 16-bits per channel. Its sample rate must be either 96K, 48K, 44.1K, 32K, or 8K. Follow the
steps below to exercise this tool.
1. Choosing the Audio tab leads to the window in Figure 3.11.
2. To play audio, plug a headset or speaker to the LINE-OUT port on the board.
3. Select the “Play Audio” item in the com-box, as shown in Figure 3.11.
4. Click “Open Wave” to select a WAVE file. The waveform of the specified wave file will be
5. Click “Start Play” to start audio play. The program will download the waveform to
displayed in the waveform window. The sampling rate of the wave file also is displayed in
the Sample Rate Combo-Box. You can drag the scrollbar to browse the waveform. In the
waveform window, the blue line represents left-channel signal and green line represents
right-channel signal.
SDRAM-U1, configure the audio chip for audio playing, and then start the audio playing
process. You will hear the audio sound from the headset or speaker. To stop the audio
playing, simply click “Stop Play”.
Figure 3.10. Reading the SD card Identification and Specification.
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DE2-70 User Manual