Assignment 7: Sound with Meaning

eperceva@andrew.cmu.edu — Tue, 29 Mar 2022 01:58:36 +0000

To develop ‘sound with meaning,’ I wrote a sketch using the tone() function to replicate the ‘wah wah wah’ trombone sound. Sketch and video below.

void setup() {

  tone(7, 293.66, 1000);
  delay(1000);
  noTone(7);
  delay(500);
  tone(7,277.18,1000);
  delay(1000);
  noTone(7);
  delay(500);
  tone(7,261.63,1000);
  delay(1000);
  noTone(7);
  delay(500);
  tone(7,246.94,3000);
  delay(1500);
  noTone(7);
  delay(3000);
}

void loop() {


}

I had a 60 hertz hum with the original power supply I used the first time around. Switching to another power reduced the issue, but it’s still there.

Resources

More background on the Teensy audio library and MQS:

https://melp242.blogspot.com/2020/10/audio-output-on-teensy-4x-boards.html

Note frequencies:

https://pages.mtu.edu/~suits/notefreqs.html

Video – Making Things Interactive, Spring 2022

Assignment 7: Sound with Meaning