Audio latency when used as a panadapter/sub receiver
Posted: Sat Jan 14, 2017 1:31 am
I am using an RSP1 as a panadapter for my Elecraft K3. The If output of the K3 feeds in to the RSP1, and I am using HDSDR software. This combination works great as a visual panadapter for the K3.
I would also like to use the sound card audio output as a sub receiver. My goal is to be able to hear both sides of a DX conversation, when the DX station is working split. I have configured HDSDR so that I can listen to one frequency on the K3, and the B VFO, which is the other side of the split frequency QSO from a sound card connected to HDSDR.
The problem is the amount of audio latency through SDR Play and HDSDR. This is not a problem when it was only used as a visual panadapter but when listening to both sources, there is a noticeable amount of latency through SDRPlay and HDSDR. I haven't measured it, but it is long enough that it would be difficult trying to use this in a crowded pile-up.
I have seen similar threads, with a very technical discussion on the potential causes. Can anyone in layman's terms suggest some ways to reduce the audio latency?
Thanks,
Don
K9AQ
I would also like to use the sound card audio output as a sub receiver. My goal is to be able to hear both sides of a DX conversation, when the DX station is working split. I have configured HDSDR so that I can listen to one frequency on the K3, and the B VFO, which is the other side of the split frequency QSO from a sound card connected to HDSDR.
The problem is the amount of audio latency through SDR Play and HDSDR. This is not a problem when it was only used as a visual panadapter but when listening to both sources, there is a noticeable amount of latency through SDRPlay and HDSDR. I haven't measured it, but it is long enough that it would be difficult trying to use this in a crowded pile-up.
I have seen similar threads, with a very technical discussion on the potential causes. Can anyone in layman's terms suggest some ways to reduce the audio latency?
Thanks,
Don
K9AQ