Hi,
Thanks for the feedback.
Let me explain these nodes in details:
(1)hybrid_node: this node provides NS, AGC, VAD algorithms from WebRTC lib, not the Alango, so we are more recommended to use the vep_node. What is more, you can enable NS, AGC, VAD in the same instance in your case, for examples:
</s>hybrid.reset(HybridNode::Create((bool)enable_ns, (int)ns_level, (int)agc_type, (int)agc_level, (bool)enable_vad, (int)vad_sensitivity,true));<e>
As the more nodes you have, the more latency you will get.
(2)vep_node: this node also provides: NS, BF, AEC algorithms from Alango, and these algorithms are better than the hybrid_node algorithms
(3)snowboy_1b_node: this node not only provides KWS, but also provides AGC and VAD. You can call respeaker->GetVad() to get VAD status(Please see pulse_snowboy_1b_multi_hotword_vad_test.cc for more detail).
Back to your case, I still recommend to use the example I provided: alsa->vep->snowboy->aloop, you can just ignore the KWS part.
And can you send me a debug log from your program when the endless “underrun” happen?
Thanks,
Jerry.