i’ve got a strange audio overrun (aOaOaO) problem. My scheme is the
following :
audio_source ---- > FFT_graphical sink
*signal = audio.source(32000,‘plughw:0,0’, True)
fft = fftsink2.fft_sink_f(panel,title=“Spettro Segnale Vocale”,
sample_rate=64e3,y_per_div=20,ref_level=-70)
self.connect(signal,fft)*
it happens to get in random way these cases :
case 1 : i get it fully working with no errors in the terminal
case 2 : it works displaying the FFT with the terminal showing
repeatedly the “aO” error
case 3 : it shows the blank display of the FFT with the terminal
showing repeatedly the “aO” error
i edited in my home the config.conf file in ~./gnuradio in this way
to override the settings:
*[DEFAULT]
verbose = False
[audio]
audio_module = audio_alsa
specify which audio module to load, or use “auto” to have the system
select one. Valid choices depend on your OS and which modules
you’ve installed, but typically include: auto, audio_alsa,
audio_oss, audio_portaudio, audio_jack, audio_osx, audio_windows
[audio_alsa]
default_input_device = plughw:0,0
default_output_device = plughw:0,0
period_time = 0.010 # in seconds
nperiods = 4 # total buffering =
period_time * nperiods
verbose = false
*
i’m using ubuntu 9.04 with the last unstable deb version dated
10.22.2009. If i enter the terminal and digit “/asoundconf
set-default-card SB/” (SB is my first listed audio card) and reboot it
seems to adjust by itself so i just decided to put it in the start
commands of the OS. The strange thing is that my laptop is a dual-core
laptop and i read that a fast computer could usually help to solve this
overrun problem (my previous laptop was not a good one :D). Did i maybe
need an update of the alsa drivers ? I hope you can help me…
thx in advance, Arturo