libsoundio vs JUCE - andrewrk/libsoundio GitHub Wiki
Benefits of libsoundio over JUCE:
Supports PulseAudio backend.
Supports Dummy backend, guaranteed to work even if computer has no sound card.
Supports channel layouts (also known as channel maps), important for surround sound applications.
Exposes both device id and friendly name. id you could save in a config file because it persists between devices becoming plugged and unplugged, while friendly name is suitable for exposing to users.
Callback function provides frame_count_min and frame_count_max to optimally leverage fixed-buffer backends such as JACK and CoreAudio, as well as flexible buffer backends such as ALSA and PulseAudio.
Errors are communicated via meaningful return codes, not strings.
Exposes extra API that is only available on some backends. For example you
can provide application name and stream names which is used by JACK and
PulseAudio.
Ability to get an event when the backend is disconnected, for example when the JACK server or PulseAudio server shuts down.
Ability to connect to multiple backends at once. For example you could have an ALSA device open and a JACK device open at the same time.
C library, does not have complicated class hierarchies or depend on libstdc++.