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High-Low Tech – Simple Arduino audio samples
http://highlowtech.org/?p=1963#:~:text=Simple%20Arduino%20audio%20samples%201%20Download%20and%20Install,...%204%20Encode%20Your%20Own%20Audio%20Sample.%20
Sampling Audio in Real Time - Audio - Arduino Forum
https://forum.arduino.cc/t/sampling-audio-in-real-time/518807
The 10uF capacitor isolates the DC bias from the audio signal (while allowing the audio signal through). In most cases you can leave out the 47nF capacitor. The bias allows the Arduino to read the negative-half of the AC audio waveform. (You can subtract-out the DC bias in software, or it's easy to ignore if you're using FFT data.)
Arduino Audio Input : 8 Steps (with Pictures) - Instructables
https://www.instructables.com/Arduino-Audio-Input/
digital recorder - with the addition of an SD card of course (the Arduino has very limited memory by itself), this opens up the possibility of looping large samples and doing lots of other digital manipulations to pieces of stored audio The circuits and code provided here are compatible with SD card shields that communicate via SPI.
Arduino Audio Output : 10 Steps (with Pictures ...
https://www.instructables.com/Arduino-Audio-Output/
So if you have a sampling rate of 40kHz (standard for most audio), then the maximum frequency you can reproduce is 20kHz (the upper limit of the audible spectrum ), and the cutoff frequency of your low pass filter should be around 20kHz. For a cutoff frequency of 20,000Hz and 1kOhm resistor: 20000=1/ (2*3.14*1000*C) C =~ 8nF
12-bit and 8-bit Audio Samplers | Project Lab
https://nootropicdesign.com/projectlab/2013/07/05/audio-sampler/
With the bypass off (left position), press S1 to record the audio to memory (up to 8.6s) with a sample rate of 22 kHz. Press S2 to play it back. Code Sampling and playing audio requires precise timing. The Arduino timer1 is used to run an interrupt service routine (ISR) at a very specific frequency.
arduino uno - How do I know the sampling frequency ...
https://arduino.stackexchange.com/questions/699/how-do-i-know-the-sampling-frequency
For a 16 MHz Arduino the ADC clock is set to 16 MHz/128 = 125 KHz. Each conversion in AVR takes 13 ADC clocks so 125 KHz /13 = 9615 Hz. That is the maximum possible sampling rate, but the actual sampling rate in your application depends on the interval between successive conversions calls.
Arduino audio sampling tutorial (part 1) - YouTube
https://www.youtube.com/watch?v=tUapZ_JdHLE
This is a detailed tutorial how to play an audio sample stored in the program memory of the ATMega micro controller used by the Arduino mega 2560. It is also...
Set sampling frequency for audio from analogRead from …
https://stackoverflow.com/questions/38238072/set-sampling-frequency-for-audio-from-analogread-from-arduino
1) use micros () statements to check the timing of the analog read operations 2) the best way to get a consistent sampling rate is by using interrupts. Specifically, a "timer interrupt". You will have to make sure that the hardware can actually sample fast enough to keep up with the audio requirements. Share edited Jul 9 '16 at 6:25
signal processing - Can an Arduino sample audio in ...
https://stackoverflow.com/questions/15900330/can-an-arduino-sample-audio-in-microseconds-for-1-4-khz
In the Arduino code (in wiring.c ), a division factor of 128 is chosen: sbi (ADCSRA, ADPS2); sbi (ADCSRA, ADPS1); sbi (ADCSRA, ADPS0); This means that each conversion takes 128*13 = 1764 clocks, which yields a theoretical maximum of 10K samples per second.
Arduino audio sampling tutorial (part 2) - YouTube
https://www.youtube.com/watch?v=zstkw6AEVAE
This second part extends to mixing of multiple samples and utilizing a precise timer interrupt. Four waves are stored in the program memory of the MCU. The c...
Simple Arduino audio samples - High-Low Tech
https://highlowtech.org/?p=1963
Encode Your Own Audio Sample To encode your own audio samples, you’ll first need to down-sample the audio to 8 KHz, 8-bit mono sound, then convert it to a series of numbers that can be pasted into your Arduino program.
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