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Topic: Unexpected "Click" sounds in playing a sine wave (Read 681 times) |
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elaine
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Unexpected "Click" sounds in playing a sine wave
« on: Dec 26th, 2003, 7:24am » |
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I'm writing a program to play the sound of a simple sine waveform. I expected a smooth sound to be played, but the program always runs with constant "Click" sounds.
I tried the example in Proce55 -> examples -> sonic -> wave. This program allows user to change the waveform as well as the freq. But, the same "click" sound also appear even though I got a smooth sine wave in the screen. Is there any ways to solve such a problem? Or we must load a sound file in order to play a smooth sound?
I would be very grateful for any suggestions anyone might have.
Thanks a lot!
From,
Elaine
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// The sonic engine processes sounds at 8 bits, mono and 8000Hz.
int sr = 8000;
int total_duration = 10;
int total_samples = total_duration*sr;
void setup() {
size(400, 400);
stroke(255);
// Initiate sound engine with a 512 audio buffer length
beginSound(total_samples);
}
void soundEvent() {
float freq = 500;
for (int i=0; i < length; i++) {
// Generate a sound using a sine wave
samples[i] = int(127 * sin(2*PI*freq*(i/(float)(total_samples-1))));
}
}
void loop() {
background(100);
for (int i=0; i < length-1; i=i+1) {
line(i*2, samples[i] + 120, i*2, samples[i+1] + 120 );
}
}
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elaine
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Re: Unexpected "Click" sounds in playing a sine wa
« Reply #1 on: Dec 26th, 2003, 2:57pm » |
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There is one modification in my coding.
For the second comment, it should be
// Initiate sound engine with a specified audio buffer length
Sorry for any troubles caused!
Thanks,
Elaine
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elaine
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Re: Unexpected "Click" sounds in playing a sine wa
« Reply #3 on: Jan 13th, 2004, 4:51am » |
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Thanks, samChen~
agree, Sonia is really helpful!!!
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