RustAudio Synth and rust-portaudio example logs

portaudio-blocking.log

PortAudio version : 1899
PortAudio version text : PortAudio V19-devel (built Aug 18 2014 05:50:44)
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Successfully initialized PortAudio
PortAudio host count : 2
PortAudio default host : 0
PortAudio host name : ALSA
PortAudio type id : -9979
Default input device info :
	version : 2
	name : default
	max input channels : 32
	max output channels : 32
	default sample rate : 44100
Default output device name : default
Successfully opened the stream.
Successfully started the stream.
Read stream available with 112 frames.
Write stream available with 768 frames.
Read stream available with 168 frames.
ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred
Write stream available with 768 frames.
An error occurred while writing to the output stream: The output stream has underflowed
Successfully closed the stream.

Successfully terminated PortAudio.

portaudio-nonblocking.log

PortAudio version : 1899
PortAudio version text : PortAudio V19-devel (built Aug 18 2014 05:50:44)
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Successfully initialized PortAudio
PortAudio host count : 2
PortAudio default host : 0
PortAudio host name : ALSA
PortAudio type id : -9979
Default input device info :
	version : 2
	name : default
	max input channels : 32
	max output channels : 32
	default sample rate : 44100
Default output device name : default
Successfully opened the stream.
Successfully started the stream.
count_down: 3
count_down: 3
[...]

synth.log

ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
It begins!
note_on
ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred
Breaking from loop as sound_stream failed to write to the PortAudio stream: OutputUnderflowed.
Great success!