Howtosignalprocessing
- Can Arduino process audio?
- How to connect audio jack to Arduino?
- Is Arduino a DSP?
- How do you use Adafruit wave shield?
Can Arduino process audio?
An Arduino is fast enough to sample an audio input with the ADC and recreate the signal on the output DAC at a rate of 44.1 kHz with 12-bits of resolution. However, when recording the sampled audio to SRAM, the sample rate is limited to about 22 kHz because it takes extra time to communicate with the memory chips.
How to connect audio jack to Arduino?
Wire the signal from the mono jack to the non-inverting input (pin 3) and connect the ground pin of the jack to the 0V reference on your voltage supply (for me this was the junction between the two 9V batteries in series). Wire a 100kOhm resistor between the output (pin 1) and inverting input (pin 2) of the op amp.
Is Arduino a DSP?
This is a collection of projects that use an Arduino to perform digital signal processing (DSP) on audio signals. By reading only 8 bits of an incoming analog signal and sending 8 parallel bits of information to an off-board DAC, it's possible to sample, process, and output audio near 44.1kHz with an Arduino Uno.
How do you use Adafruit wave shield?
The shield comes with an Arduino library for easy use; simply drag uncompressed wave files onto the SD card and plug it in. Then use the library to play audio when buttons are pressed, or when a sensor goes off, or when serial data is received, etc.
