Năng Lượng 9

Use Audacity
• Generate→Chirp…
- Start
Frequency (Hz): 20
Amplitude: 1
- End
Frequency (Hz): 8000
Amplitude: 1
Interpolate: Log
Duration: 00h 00m 0.500s

• Press |< button for return to 0.000s and unselect track

• Generate→Tone…
Wave form: Saw
Frequency: 50 Hz
Amplitude 0.5
Duration: 0.5s

• Original track (top track) press down arrow (left side where show data about track)
Make Stereo Track

• Select stereo track

• Effect→Vocoder…
Distance: 1
Output choice: both channels
Number vocoder bands: 240
Amplitude of original audio (percent): 100
Amplitude of white noise (percent): 0.0
Amplitude of Radar Needles (percent): 0.0
Frequency of Radar Needles (Hz): 1.0

• Select 0.000 to 0.500s (all)

• Copy

• Paste copy at 0.500s

• Reverse copy