Hi, The multi touch is NOT limited to 3 points. Search the forums, Dianne Hackborne indicated that she had only put in constants for up to 3, but you can do as many as you want.
-niko On Nov 4, 8:18 am, Ulrich Althöfer <[email protected]> wrote: > Yes, those applications are the hype, I think! > But what's about guitar-playing? > You need 4 fingers simultaneously and more (for to hit the string)? I > read about, that the multi-touch-option is limited to 3 simultaneously > fingers touched. > I am glad to see such applications! > > Greetings > Ulrich > > On 4 Nov., 05:15, PJ <[email protected]> wrote: > > > > > I have a great idea for an app and wanted to get everyone's input on 4 > > different technical aspects of it. > > > Some of you might be familiar with the iPhone musical app where you > > can "play" it like a flute/ocarina. You blow into the mic and use > > multi-touch to press a combination of holes to play different sounds. > > > I'm thinking about writing a *similar* app for Android, except it's a > > *trumpet* instead of a flute. My idea is: > > * The screen shows three circles in a line, which represent the three > > trumpet valves. > > * Touching a circle represents holding down a valve. > > * Blowing into the mic represents blowing into the trumpet. > > * Note: On a "real" trumpet, the note pitch depends not only on the > > valve combination, but also on the lip vibrations. (Otherwise there > > would only be 7-8 possible notes.) > > * I'm thinking that the angle (elevation) of the phone could represent > > different pitches. So, if you elevate the phone up, you'll play a > > higher note, for example. > > > The 4 technical aspects that I'd like to verify are: > > > 1. What is the most sensible way to detect blowing into the > > microphone? My current plan is to do AudioRecord.read() and manually > > examine the audio buffer data to check for sufficiently high amplitude > > (volume). I think this will be pretty easy, but just wanted to check > > whether there's another better way to do this. > > > 2. Is it possible to record and play at the same time? I need to > > record blowing into the mic and playing sound at the same time. > > > 3. For checking elevation angle, I assume I should use SensorManager. > > I assume that I want to use getInclination(), but I think I might also > > need getRotationMatrix() or getOrientation(). Seems pretty easy, but > > does anyone know of any examples I could look at? > > > 4. For detecting which valves are pressed down, I assume that it's > > feasible to use the multi-touch feature. However, I have a G1 phone. > > Is it possible to get multi-touch to work with the G1 phone somehow? > > (This question probably deserves its own thread!) > > > I'm not going to ask about how to program multi-touch because there's > > a good discussion of the technical features > > at:http://groups.google.com/group/android-developers/browse_thread/threa... > > > Anyway, your input is highly welcome, as well as any other suggestions > > you might have for this app. (By the way, I might do other > > instruments too, besides, trumpet, but I figure that if I can get > > trumpet to work, I can get any other instrument to work.) -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
