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From: | Arturo Rinaldi |
Subject: | [Discuss-gnuradio] Audio Overrun ( aOaOaO problem) - how to solve ? |
Date: | Sat, 19 Dec 2009 01:36:41 +0100 |
User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.7pre) Gecko/20091216 Shredder/3.0.1pre |
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 |
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