Keep adaptive requests above baseline and test backend fault events

tools/chatgui/src/audio_device.cpp

@@ -48,6 +48,8 @@ bool AudioDevice::init(ma_context* context, ma_device_config config, const char*
     m_bufferKeyValid = true; m_bufferBackend = context->backend; m_bufferType = config.deviceType;
     m_bufferSession = session; m_bufferSelected = selected != nullptr;
     if (selected) m_bufferDeviceId = *selected;
+    m_bufferTuning.baseMs = config.periodSizeInFrames && config.sampleRate
+        ? unsigned((uint64_t(config.periodSizeInFrames) * 1000 + config.sampleRate - 1) / config.sampleRate) : config.periodSizeInMilliseconds;
     if (m_bufferTuning.requestedMs) {
         config.periodSizeInFrames = 0; config.periodSizeInMilliseconds = m_bufferTuning.requestedMs;
     }