it might be interesting to slowly sweep a sine wave across the audio range while plotting variation in the accelerometer reading...
On Aug 28, 9:40 pm, Robert Green <rbgrn....@gmail.com> wrote: > And that's almost exactly what I see. I notice extra bad numbers > coming through on certain frequencies of sound. I know I've > complained about one or two things in the past but this really is a > pretty bad flaw. Let's hope future devices don't have the same > problems. > > On Aug 28, 7:56 pm, Chris Stratton <cs07...@gmail.com> wrote: > > > > > On Aug 28, 7:39 pm, Robert Green <rbgrn....@gmail.com> wrote: > > > > It's no secret that both the HTC Dream and HTC Magic have problems > > > with sound from the built-in speaker interfering with the > > > accelerometer. I'm currently having the problem with my new game and > > > am not sure how I'm supposed to work around it. Quite frankly, the > > > sound is a big part of the game and most people prefer to play with it > > > on. I found a great way to use tilt-view control and it works really > > > well until I turn sound on, then it all goes to crap. > > > > Sure, I could crank the sample rate up to highest and take a running > > > average of the past 5 or so samples and pull out the outliers but it's > > > still not very accurate. > > > Ugh, if your observation is accurate this sounds like a system design > > bug. Average actually won't fully work, because the sensor needs to > > be low pass filtered before the analog to digital conversion, in order > > to keep any frequency components above its nyquist limit out of the > > digitizer. Otherwise you will get really odd effects if you have an > > audio frequency that's near a multiple of the sample rate... they can > > alias back to near zero frequency and look like very slow variations > > in reading, which would go right through your averaging. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
