I'm setting up a RemoteHams server with an Adalm-Pluto SDR for QO-100 operation and running into some latency issues with audio streaming. The remote SDR system handles web browser control with reduced bandwidth needs versus direct SDR data streams, but I'm still experiencing about 300ms delay between TX audio input and actual transmission. Currently running on a Raspberry Pi 4B with the latest RemoteHams software.

Has anyone successfully optimized audio latency on this setup? I'm particularly interested in buffer size tweaks and network optimization settings that might help with real-time operation.

Also curious about the claimed bandwidth reduction from 10M bytes/sec for raw SDR data down to less than 100k bytes/sec for processed audio and spectrum data - are these figures realistic in practice?

I've been running a similar setup for over a year now. The key is optimizing your Pi's SD card - use a high-quality Class 10 card and ensure you're using a proper power supply. Also check your network jitter - even small amounts like 6ms can affect audio quality.

Are you using the built-in WiFi or ethernet? I found ethernet gave me much better results. The Orange Pi Zero 2 might be worth considering as it has both ethernet and WiFi options with good performance.

For QO-100 work, that 300ms latency will definitely be noticeable. Try adjusting the audio sample rates in the config files - sometimes dropping from 48kHz to 44.1kHz can help. The bandwidth claims are pretty accurate in my experience, especially compared to running something like SDR# over VNC.