I'm a newbie. I am trying to use an Arduino to detect the frequency of a note that I play on the flute or harp, then display the frequency on an OLED. I have an Uno r3, a Mega 2560, and a Micro. What do I need to get to "hear" the note, then translate it into numerical notation for the display? FWIW, I also have an OSYOO Micro v. 1.4.
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You will need a microphone and amplifier module to bring the signal level up high enough for the Arduino analog inputs to read.
Frequency can be determined by FHT or FFT or autocorrelation analysis. I recommend the OpenMusicLab FFT for AVR-based Arduinos (Uno, Nano, Mega etc.).
The microphone and amplifier modules you refer to are Arduino products, or Arduino-friendly products? Where would I find them?
Hello, Paulpaulson, glad to meet you.
Buy them lots of places. Adafruit and Sparkfun, for example.
You can even use a speaker: connect one pin to any analog input and the second to a voltage divider (VCC ---[10k]---[speaker]---[10k]---GND)
Best to add a capacitor from the voltage divider tap to ground, 10 uF would work. Then that end of the speaker is at AC ground potential.
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