atuline / arduino-sampling

High and low speed sound sampling on an Arduino

Arduino Sampling

By: Andrew Tuline

Email: [email protected]

Date: March, 2019

Updated: April, 2020

This repository contains several examples of A/D conversion of audio input using:

• Arduino Nano
• Sparkfun ADMP401 MEMS microphone

In April, 2020, I added a .pdf file containing the results of my testing of various microphones.

Various routines also utilize the following libraries:

• http://wiki.openmusiclabs.com/wiki/ArduinoFFT
• http://wiki.openmusiclabs.com/wiki/ArduinoFHT
• https://github.com/FastLED/FastLED

Examples include:

10 bit ADC port sampling for use with the FHT calculations. 8 bit ADCH port sampling. analogRead for use with general sound routines.

For general sampling, averaging and peak detection, we seem to be OK with analogRead.

Here's some cool references:

https://www.instructables.com/id/Arduino-Frequency-Detection/ https://sites.google.com/site/qeewiki/books/avr-guide/analog-input http://yaab-arduino.blogspot.com/2015/02/fast-sampling-from-analog-input.html https://www.instructables.com/id/Girino-Fast-Arduino-Oscilloscope/ https://www.gammon.com.au/adc http://www.robotplatform.com/knowledge/ADC/adc_tutorial.html https://www.newbiehack.com/MicrocontrollersADC10Bits.aspx

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This repository: https://github.com/atuline/Arduino-Sampling

My Youtube channel is at: https://www.youtube.com/user/atuline/videos My Github account is at: https://github.com/atuline My Gists are at: https://gist.github.com/atuline My Pastebins are at: https://pastebin.com/u/atuline FastLED support forum: https://www.reddit.com/r/fastled