Novice - stream mic to amp

[malaki86]

I'm starting a project, utilizing two INMP441 mics, two MAX98357 amps and a Seeed Studio XIAO ESP32-S3. Basically, I want to stream each mic directly to the corresponding speaker, L & R. I connected a single mic and amp for the initial testing. Using examples online, I can see that the mic is working. However, I haven't gotten any sound out of the amp, with a pair of earbuds connected to the amp output. I also tried a different amp, with the same connections - no sound, but I do get a slick 'click' sound in the earbud if I disconnect/connect the amp VDD connection to 3V3 or 5V.

Wiring is set up with shared I2S WS and CLK, and a separate GPIO for the data in/out. I loaded up the example from this library to stream i2s-i2s, modified the GPIO assignments in the sketch and uploaded it. I only see constant scrolling for the streamcopy. I get the exact same from the streams-generator-i2s example (I added the pin configs).

Pins are:
XIAO -> MAX98357
GPIO09 -> LRC
GPIO08 -> BCLK
GPIO06 -> DIN

XIAO -> INMP441
GPIO09 -> WS
GPIO08 -> SCK
GPIO07 -> SD

What am I missing? Again, these are the provided examples, with only the pin assignments changed

[pschatzmann]

Just follow these recommendations in the Wiki
Also don't ignore the Wiki ADC information

[malaki86]

I disconnected everything and only hooked up a single MAX98357A. I opened the streams-generator-i2s code, modified the pin assignments and uploaded it. No sound whatsoever. I honestly don't know what I'm missing. I have double/triple checked, completely rewired, double/triple checked again. No sound.

LRC -> D10 (gpio09)
BCLK -> D9 (gpio08)
DIN -> D7 (gpio06)
GAIN -> GND
GND -> GND
VDD -> 3V3 (VUSB makes no difference)

Serial monitor output (scrolls nonstop):
[I] StreamCopy.h : 168 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops [I] StreamCopy.h : 168 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops [I] StreamCopy.h : 168 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops

This is the code I uploaded:

`#include "AudioTools.h"

AudioInfo info(44100, 2, 16);
SineWaveGenerator<int16_t> sineWave(32000); // subclass of SoundGenerator with max amplitude of 32000
GeneratedSoundStream<int16_t> sound(sineWave); // Stream generated from sine wave
I2SStream out;
StreamCopy copier(out, sound); // copies sound into i2s

// Arduino Setup
void setup(void) {
// Open Serial
Serial.begin(115200);
while(!Serial);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);

// start I2S
Serial.println("starting I2S...");
auto config = out.defaultConfig(TX_MODE);
config.copyFrom(info);
config.pin_ws = 9;
config.pin_bck = 8;
config.pin_data_rx = 6;
out.begin(config);

// Setup sine wave
sineWave.begin(info, N_B4);
Serial.println("started...");
}

// Arduino loop - copy sound to out
void loop() {
copier.copy();
}
`

[pschatzmann]

This is wrong for output TX:
config.pin_data_rx = 6;

It should be config.pin_data = 6; or config.pin_data_tx = 6;
as described here

[malaki86]

I made the change, uploaded, and still nothing:

auto config = out.defaultConfig(TX_MODE);
config.copyFrom(info);
config.pin_ws = 9;
config.pin_bck = 8;
config.pin_data = 6;
out.begin(config);

[malaki86]

I found the issue. I was using the GPIO pin numbers. I changed them to the D#'s on the board, and voila.