create every day - 福野泰介の一日一創

What's the Sound? Happy Hina-Festival Song in Japan

2017/03/03 23:55:00
#IchigoJam #music #english 

Today is Happy Hina-Festival(ひなまつり@ja) day!

This program plays a Japanese song of this festival.

PLAY"T84L8 $GGGFGGA-GGA-A-G4.R E-E-E-DE-E-GE-DDE-DC4.R A-16G16E-E-GGA-G4.R E-4DCDE-GA-GE-DC4.R"

Why do you hear the sound?

The sound is the wave of the air pressure. The wave waves your eardrum of ears.
The wave has a frequency.
The unit of frequescy is Helz(Hz). 1Hz means 1 wave per 1 second.
Mankind named 440 Hz is tone A(ラ@ja). If the frequency become doubles to 880 Hz, you will hear the higher tone A.

Reconnect the sounder to GND-OUT3, and type this command.

PWM 3,227/2,227

PWM (Pulse Width Modulation) is a IchigoJam command to output continuously pulses.
This setting is 2.27 milliseconds period (1/0.00227 = 440.529Hz).
You can select 2 base periods (OUT2-5 is group A, OUT6 is group B)

Try play 3 tones harmony on IchigoJam!

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この作品は「Creative Commons — CC BY 4.0」の下に提供されています。
CC BY 福野泰介 - Taisuke Fukuno / @taisukef / high-res profile image