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		liusangel posted in technical issues • read moreHi: I have this problem with the audio of my computer. 
 When i start pd-extended the audio seems to be only working for pd. If I am playing music from my harddrive or from youtube it just stop until I close pd.I use Elementary OS Luna (based in ubuntu 12.04) and install pd from the official repositories(http://puredata.info/docs/faq/debian) I've alredy googled the issue but i could find anything. Anyone? I would appreciate the help. 
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		liusangel posted in technical issues • read moreHi there My problem: when i try to load a patch with the command "pd-extended -nogui -open /home/pi/test.pd" the console send me a message saying "ALSA input error (snd_pcm_open): Device or resource busy" and "ALSA output error (snd_pcm_open): Device or resource busy" But, when I use the command "pd-extended -open /home/pi/test.pd"(without -nogui) everything works fine. Note: the error "ALSA input error (snd_pcm_open): Device or resource busy" and "ALSA output error (snd_pcm_open): Device or resource busy" also occurs when I choose the default audio card of the Raspberry PI but not when I choose a generic USB audio card all this with GUI of course. System: Raspberry PI with 2013-12-20-wheezy-raspbian I appreciate any ideas. Thanks. 
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		liusangel posted in Off topic • read moreHi im reading miller's book, and i want to know the answers of the exercise to compare with my results. if someone was kind enough to respond I would be grateful. Exercises 
 1. A sinusoid (Page 1) has initial phase φ = 0 and angular frequency ω =
 π/10. What is its period in samples? What is the phase at sample number
 n = 10?
 2. Two sinusoids have periods of 20 and 30 samples, respectively. What is
 the period of the sum of the two?
 3. If 0 dB corresponds to an amplitude of 1, how many dB corresponds to
 amplitudes of 1.5, 2, 3, and 5?
 4. Two uncorrelated signals of RMS amplitude 3 and 4 are added; what’s
 the RMS amplitude of the sum?
 5. How many uncorrelated signals, all of equal amplitude, would you have to
 add to get a signal that is 9 dB greater in amplitude?
 6. What is the angular frequency of middle C at 44100 samples per second?
 7. Two sinusoids play at middle C (MIDI 60) and the neighboring C sharp
 (MIDI 61). What is the difference, in Hertz, between their frequencies?
 8. How many cents is the interval between the seventh and the eighth har-
 monic of a periodic signal?
 9. If an audio signal x[n], n = 0, ..., N − 1 has peak amplitude 1, what is the
 minimum possible RMS amplitude? What is the maximum possible?
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		liusangel posted in technical issues • read moreNevermind. The problem is solve. The message ";pd dsp 1" needs a |delay 2000|. 
