Computer Music: Musc 216
SYD 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 SYD Patch):
- Double click on the Output operator.
- You should see this window:
Change the value in the Frequency field to 220
Note the Amplitude of .5. The wave form is a Sine wave.
- Click OK to accept these values.
- MAKE SURE YOU HAVE ENTERED .5 (50%) in the AMPLITUDE
- Click the SYNTHESIZE button at the bottom 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
- When you are ready to proceed, click the PLAY button at the bottom
left corner of the patch window. You should hear the sine wave
play in your headphones. Or, click the link below to hear sound.
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
Note that the frequency of 220 Hz is ONE OCTAVE lower than the
frequency of 440 Hz.
- 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
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