--- SoapyRTLSDR.hpp.orig	Mon Aug 25 17:45:34 2025
+++ SoapyRTLSDR.hpp	Fri Jul 31 20:18:53 2026
@@ -264,9 +264,10 @@ class SoapyRTLSDR: public SoapySDR::Device (public)
         std::vector<signed char> data;
     };
 
-    //async api usage
-    std::thread _rx_async_thread;
-    void rx_async_operation(void);
+    //sync api usage
+    std::atomic<bool> _rxRunning;
+    std::thread _rx_sync_thread;
+    void rx_sync_operation(void);
     void rx_callback(unsigned char *buf, uint32_t len);
 
     std::mutex _buf_mutex;
