Al Johnson píše v Pá 04. 02. 2011 v 13:46 +0000: > How did you pick 0.5mV as a suitable input amplitude? Measurement of peaks > when talking? > >
It was completely wrong! I did some internet search and found that micropohone like that in FR usually produce signal with amplitude in tens of mV. I was wondering if the singal was only 0.5mV it wouldn't probalby get distorted so easily - so I went to check my generator and saw that the attenuator was set incorrectly and so the signal was probably way higher than 0.5mV. I was doing bass-fix to my Freerunner today so I did the the same measurement with generator again. I run "Voice notes" and set the generator so that the amplitude was simmilar to the amplitude of voice, captured by the microphone. LAter on I was listening to the files recorded when setting the generator and the 1kHz beep was clean and the volume was OK. I rewrite the text and put there all pictures from the scope I made. http://hnet.endofinternet.net/elektro/Freerunner/ALSA/sound_setting.html Seems that the sidetone may be set to 2 instead of 1, but mic should stay 0. Thanks for your question ! Zb. > _______________________________________________ > Openmoko community mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/community _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
