From 69f18ae7491f24f471bc8dedbd515e1f43ea535e Mon Sep 17 00:00:00 2001
From: TMRh20 <tmrh20@gmail.com>
Date: Tue, 22 Oct 2024 19:03:55 -0600
Subject: [PATCH] nRF52: Stereo mode not set back to mono

---
 .../Platforms/NRF52/NRF52_PDM_PWMTest/NRF52_PDM_PWMTest.ino     | 2 +-
 src/NRF52840/AutoAnalogAudio.cpp                                | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/examples/Platforms/NRF52/NRF52_PDM_PWMTest/NRF52_PDM_PWMTest.ino b/examples/Platforms/NRF52/NRF52_PDM_PWMTest/NRF52_PDM_PWMTest.ino
index 138c0da..8e337b6 100644
--- a/examples/Platforms/NRF52/NRF52_PDM_PWMTest/NRF52_PDM_PWMTest.ino
+++ b/examples/Platforms/NRF52/NRF52_PDM_PWMTest/NRF52_PDM_PWMTest.ino
@@ -17,7 +17,7 @@ void setup() {
 void loop() {
 
   aaAudio.getADC(320); // Get 320 Samples from the ADC
-  for (int i = 0; i < 320; i++) {  // Copy them into the DAC Buffer and change from signed to unsigned ( + 0x8000)
+  for (int i = 0; i < 320; i++) {  // Copy them into the DAC Buffer
     aaAudio.dacBuffer16[i] = (uint16_t)(aaAudio.adcBuffer16[i]);
   }
   aaAudio.feedDAC(0,320); // Feed the DAC with the ADC data
diff --git a/src/NRF52840/AutoAnalogAudio.cpp b/src/NRF52840/AutoAnalogAudio.cpp
index e7b2082..c202260 100644
--- a/src/NRF52840/AutoAnalogAudio.cpp
+++ b/src/NRF52840/AutoAnalogAudio.cpp
@@ -132,6 +132,8 @@ void AutoAnalog::setSampleRate(uint32_t sampRate, bool stereo){
       
       if(stereo){
         NRF_I2S->CONFIG.CHANNELS = I2S_CONFIG_CHANNELS_CHANNELS_STEREO << I2S_CONFIG_CHANNELS_CHANNELS_Pos;
+      }else{
+        NRF_I2S->CONFIG.CHANNELS = I2S_CONFIG_CHANNELS_CHANNELS_LEFT << I2S_CONFIG_CHANNELS_CHANNELS_Pos;
       }
       
       if(sampRate <= 16000){