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Computer Music: Musc 216
JSYD Tutorial 6
Adjusting the FREQUENCY
The FREQUENCY
of the output of your patch is determined by a parameter in the Oscillator
operator. Using the simple patch you created in the 1st tutorial
(Creating a Simple JSYD Patch):
- Select the Oscillator operator.
- Change the value in the Frequency field to 220.
- You should see this window:
- MAKE SURE YOU HAVE ENTERED .5 (50%) in the AMPLITUDE
field.
- Click the SYNTHESIZE button at the top left corner of the
patch window. You will not hear the sound of the patch until
you "synthesize" it.
- Make sure your headphones are connected to the audio output of
the computer.
- When you are ready to proceed, click the PLAY button at the top
left corner of the patch window. You should hear the sine
wave play in your headphones. Or, click the link below to hear
sound.
sine2.aiff
Note that the FREQUENCY
of 220 Hz is ONE OCTAVE
lower than the FREQUENCY
of 440 Hz.
FURTHER EXPERIMENTS: Try changing the values in the Oscillator parameters
window: Remember, you have to RE-SYNTHESIZE the patch after change
in order to hear the result
- Change the frequency
to another value. For example, 110 Hz or 880 Hz.
- Change the amplitude
to another value. For example, .25 (25%); .1 (10%); .75 (75%).
Changing the value to 1.0 will produce the loudest sound with no digital
noise (clipping)
for the hardware of your computer. A value greater than 1.0
will produce a "clipped"
wave that will no longer be a true sine wave and will sound more like
a SQUARE WAVE.
IT IS NOT RECOMMENDED THAT YOU SET THE AMPLITUDE
OF THE OUTPUT TO A VALUE GREATER THAN 1.0. IF YOU DO, MAKE
SURE THAT YOU REMOVE YOUR HEADPHONES.
ALSO, IF YOU CHOOSE A WAVEFORM WITH A HIGH
INTENSITY (SQUARE, SAW, ETC.) THE PERCEIVED LOUDNESS WILL BE MUCH
GREATER THAN A SINE WAVE. KEEP THE AMPLITUDE LESS THAN .5
(50%). IF YOU INCREASE THE AMPLITUDE > 50% THEN MAKE SURE THAT YOU REMOVE
YOUR HEADPHONES.
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