Hmm, maybe I've misunderstood something somewhere along the way. Middle C is 400Hz so I was creating a sine wave that repeats 400 times across the 7200 samples that make up one second on the epuck. Is this approach wrong ? I wouldn't've thought that middle-c qualified as particularly low, certainly not sub-woofer territory ! :-)
ANdy 2009/9/16 Michael Bonani <michael.bon...@epfl.ch> > Hi, > > > > I have not the ideal solution but my first impression is that the sound is > saturating; your sinus becomes a scare wave and so buzz. Try to reduce the > amplitude of your sinus. > > There is than an analogue amplifier that wills amplify your sinus. (If I > remember it is 4.7 time). > > > > Also the speaker size of the e-puck is more usable for high frequency, it > is not a subwoofer. > > > > Regards > > > > Bonani Michael > > > > > ------------------------------------------------------------------------------------------ > > Tél : + 41 21 693 78 69 > > Fax : + 41 21 693 78 07 > > E-mail : michael.bon...@epfl.ch > > Adress: > > EPFL-STI-IPR-LSRO1 > > MEB 3 30 > > Station 9 > > 1015 Lausanne > > > > *From:* e-puck-user-boun...@gna.org [mailto:e-puck-user-boun...@gna.org] *On > Behalf Of *Andy Guest > *Sent:* Wednesday, September 16, 2009 1:02 PM > *To:* e-puck-user@gna.org > *Subject:* [E-puck-user] Epuck Sound Generation > > > > Hey folks, > > > I'm trying to get my epucks to make sounds. I think I've got everything > set up right except the e_const_sound.s file. I'm trying to get the pucks to > generate a clear tone and what I get is, well raspy is the best word I can > think of. It sounds more like a buzz than a clear tone. > > I'm trying to populate the e_const_sound.s file by generating a set of > 7200 values based on a sine wave (to give a one second sound). I am trying > to use a sine wave of frequency 400Hz across those values, converting them > to q15 format. I get the raspy/buzz sound. If I increase the frequency the > sound does get clearer but by the time its clear it is also painfully high > pitched. > > So I guess I've a few questions. Is the buzz the best I can hope for at > low frequencies ? If not then am I on the right track with the sine wave ? > Or Am I completely wrong ? > > Thanks > > Andy > > _______________________________________________ > E-puck-user mailing list > E-puck-user@gna.org > https://mail.gna.org/listinfo/e-puck-user > >
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