Hello, in module-bluez5-device.c latencies for bluetooth are defined as follows: #define FIXED_LATENCY_PLAYBACK_A2DP (25 * PA_USEC_PER_MSEC) #define FIXED_LATENCY_PLAYBACK_SCO (125 * PA_USEC_PER_MSEC) #define FIXED_LATENCY_RECORD_A2DP (25 * PA_USEC_PER_MSEC) #define FIXED_LATENCY_RECORD_SCO (25 * PA_USEC_PER_MSEC) This is similar in module-bluez4-device.c. Is there a reason why the latency for SCO playback is set so high? With my bluetooth devices, the latencies reported with pacmd list-sinks are similar for SCO and A2DP: A2DP: current latency: 25,67 ms fixed latency: 45,32 ms SCO: current latency: 25,47 ms fixed latency: 128,00 ms Regards Georg