m5unified.patch

diff --git a/src/utility/Speaker_Class.cpp b/src/utility/Speaker_Class.cpp
index e4094b9..6c9f42e 100644
--- a/src/utility/Speaker_Class.cpp
+++ b/src/utility/Speaker_Class.cpp
@@ -969,6 +969,17 @@ label_continue_sample:
       auto chinfo = &_ch_info[ch];
       chinfo->wavinfo[0].clear();
       chinfo->wavinfo[1].clear();
+      // Reset the resampler / linear-interpolator state. Without this, the
+      // ch_diff fractional accumulator + liner_buf 2-sample history persist
+      // across begin()/end() cycles. stackchan-idf swaps Mic ↔ Speaker every
+      // conversation turn (CoreS3 shares I2S_NUM_1), so over many turns the
+      // accumulator drifts away from steady state, audibly slowing playback
+      // and adding scratchy artefacts that reset only with a reboot.
+      chinfo->index = 0;
+      chinfo->diff = 0;
+      chinfo->flip = false;
+      chinfo->liner_buf[0][0] = chinfo->liner_buf[0][1] = 0;
+      chinfo->liner_buf[1][0] = chinfo->liner_buf[1][1] = 0;
     }
 #if !defined (SDL_h_)
     _i2s_driver_uninstall(_cfg.i2s_port);
diff --git a/src/utility/rtc/RTC_PowerHub_Class.cpp b/src/utility/rtc/RTC_PowerHub_Class.cpp
index 37ec1ab..821e4f8 100644
--- a/src/utility/rtc/RTC_PowerHub_Class.cpp
+++ b/src/utility/rtc/RTC_PowerHub_Class.cpp
@@ -92,7 +92,7 @@ namespace m5
   int RTC_PowerHub_Class::setAlarmIRQ(const rtc_date_t *date, const rtc_time_t *time)
   {
 
-    std::uint8_t buf[3];
+    std::uint8_t buf[3] = {0, 0, 0};
     bool irq_enable = false;
 
     if (time) {