The soundStimuli demo does not work on my laptop (Dell latitude 5400) using Ubuntu 20.04.1 LTS. Any hint? Thanks in advance.
The output error is:
##Running: /home/martin/.local/lib/python3.8/site-packages/psychopy/demos/coder/stimuli/soundStimuli.py ##
Using PTB (with [‘portaudio’]) for sounds
PTB-INFO: Trying to suspend potentially running PulseAudio server… … status 0
PTB-INFO: Using modified PortAudio V19.6.0-devel, revision unknown
PTB-INFO: New audio device 6 with handle 0 opened as PortAudio stream:
PTB-INFO: For 2 channels Playback: Audio subsystem is ALSA, Audio device name is default
PTB-INFO: Real samplerate 44100.000000 Hz. Input latency 0.000000 msecs, Output latency 21.337868 msecs.
PTB-INFO: Will use the following logical slave-channel -> master-channel mappings for sound output to audio stream 1:
1 --> 1 : 2 --> 2 :
PTB-INFO: New virtual audio slave device with handle 1 opened and attached to parent device handle 0 [master 0].
PTB-INFO: For 2 channels playback.
PTB-INFO: Real samplerate 44100.000000 Hz. Input latency 0.000000 msecs, Output latency 21.337868 msecs.
PTB-INFO: Will use the following logical slave-channel -> master-channel mappings for sound output to audio stream 2:
1 --> 1 : 2 --> 2 :
PTB-INFO: New virtual audio slave device with handle 2 opened and attached to parent device handle 0 [master 0].
PTB-INFO: For 2 channels playback.
PTB-INFO: Real samplerate 44100.000000 Hz. Input latency 0.000000 msecs, Output latency 21.337868 msecs.
PTB-INFO: Will use the following logical slave-channel -> master-channel mappings for sound output to audio stream 3:
1 --> 1 : 2 --> 2 :
PTB-INFO: New virtual audio slave device with handle 3 opened and attached to parent device handle 0 [master 0].
PTB-INFO: For 2 channels playback.
PTB-INFO: Real samplerate 44100.000000 Hz. Input latency 0.000000 msecs, Output latency 21.337868 msecs.
done
0.2611 INFO Loaded psychtoolbox audio version 3.0.16.546732633
0.2613 INFO sound is using audioLib: PTB
0.4769 EXP Sound set volume 0.800
0.4775 EXP Sound started
1.2783 EXP Sound started
1.6790 EXP Sound started
PTB-INFO: Closing handle 3.
PTB-INFO: Closing handle 2.
PTB-INFO: Closing handle 1.
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
unknown option character l
free(): invalid pointer
#####Experiment ended. #####