Android :: Audio Programming And Tone Synthesis
Jun 25, 2010
I am mostly a business programmer and I've not done anything in audio programming since the ZX Spectrum so I'm not sure how to even ask this question correctly.I just need some pointers in the right direction with regards to writing (Android in this case, but it is really a general question) applications which deal with audio such as a Tone Matrix.
Are they based on generating lots of samples or are the tones generated on the fly?
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Jun 23, 2010
The application allowed its users to control the volume of the artist; even mute it.How is this possible?Does adjusting artist sound/setting equalizer etc. mean performing some transformation of required frequencies? What sort of mathematics is required here(frequency domain transformations)?The application recorded users voice input via a mic. Assuming that the sound is recorded in some format, the application was able to mix the recording with the karaoke track(with artists voice muted). How can this be done?Did they play both the track and voice recording simultaneously? Or maybe they inserted additional frequency(channel?) in the original track, maybe replaced it?What sort of DSP is involved here? Is this possible in Java, Objective C?
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Dec 24, 2009
I have made apps for the iPhone, but want to also code for the Android but want to know if it is first worth my time, second worth my having to learn another language, and third worth the effort in the sense that am I going to make a profit from this. Also if in any way Android code is similar, then will it be hard to bring the iPhone (Xcode) files, or copy and paste my iPhone code into the Android code.
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Aug 19, 2010
Passing the following SSML (Speech Synthesis Markup Language) document to the com.svox.pico TextToSpeech engine resulted in a reading of the XML body but no control from the phoneme element or the emphasis element. This result (no apparent SSML control) is the same on a Nexus One running Android 2.2 as well as on the emulator running an AVD with SDK level 8.
String text = "<?xml version="1.0"?>" +
"<speak version="1.0" xmlns="http://www.w3.org/2001/10/synthesis" " +
"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" " +
"xsi:schemaLocation="http://www.w3.org/2001/10/synthesis " +
"http://www.w3.org/TR/speech-synthesis/synthesis.xsd" " +
"xml:lang="en-US">" +
"tomato " +
"<phoneme alphabet="ipa" ph="təmei̥ɾou̥"> tomato </phoneme> " +
"That is a big car! " +
"That <emphasis> is </emphasis> a big car! " +
"That is a <emphasis> big </emphasis> car! " +
"That is a huge bank account! " +
"That <emphasis level="strong"> is </emphasis> a huge bank account! " +
"That is a <emphasis level="strong"> huge </emphasis> bank account!" +
"</speak>"; mTts.speak(text, TextToSpeech.QUEUE_ADD, null);
Does any Android TTS engine support any of the SSML elements?
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Jun 23, 2010
Is it possible to start a text to speech instance from a service? i have tried the following but it doesn't seem to work. code...
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Dec 3, 2009
I installed the new maps app on my G1 the other day. Now my audible tap sound is maxed out. It seems like this audible tap is on an audio channel that you can't adjust with the volume settings. I've tried changing all settings in the Toggle Settings volume pane and it doesn't fix this.
This happened right after I tried out the turn by turn directions. I suspect that the turn by turn voice is using the same channel as the audible tap and it's maxing that volume out when it turns on. Fine, but it should set it back to where it was when it exits. And it really shouldn't be using a channel that the end user can't alter volume on.
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May 23, 2010
Does anyone know if there is a way for either meridian or the regular android player to recognize audio tags on lossless audio files?
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Sep 22, 2010
Is there an Android equivalent to the iOS Core Audio / Audio File Stream Services? I need to be able to read audio bytes from a network and feed them to the audio system under my control, so I can do my own timeouts / reconnects / range requests / etc. without interrupting the audio playback (since the system audio thread would be playing audio already enqueued). It seems that MediaPlayer doesn't give me this level of control. Is there a lower-level framework that does, either in the SDK or NDK?
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Oct 2, 2010
I want combine two audio files. (A audio file + B audio file = AB audio file)So, my search result is:
1. useing an AudioTrack.
2. decode PCM from audio file.
3. combine PCM.
This is currect? It there another way?
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Oct 17, 2010
I want to record a sample from the microphone, then I want to play the recorded file maximizing the volume and apply some audio effect, like modifing sample rate or addind an echo.Waht is the best way? is there an example?
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Jun 2, 2009
Could you please let me know how to do the audio record in android emulator and play the same recorded audio. Could you please help me in proceeding in development.I tried with MediaPlayer API's also.Its not working.
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May 8, 2010
Is there a way to determine the audio format of an audio file in Android? On normal java I do it like this:
File file= new File(...);
AudioInputStream stream = AudioSystem.getAudioInputStream(file);
AudioFormat format= stream.getFormat();
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Jul 28, 2010
Possible Duplicate: Good book for beginning android development. what is the best book for start programming for android?
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Jun 22, 2013
I want to start programming android apps , but dunno how.
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Aug 7, 2010
I have a some strange issue. I would like to get the package name of the current home screen. lets say we have two home screens : 1. default android home theme 2. 3rd party home theme. Assume both are installed and current home theme is 3rd party home theme.
Now I would like to get the package package name of the current home theme (3rd party). Is there any api which can give the current home screen package name? I can get the package name in ddms. But I want it pro grammatically.
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Apr 24, 2010
I'm new to Android programming. I've seen different phones with different screen resolutions that run on Android. How can I create an application that works on all android devices with out any distortion in my application views.....
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Jun 25, 2010
Can anyone recommend a good Beginner Android programming book? When I was in college about 20 years ago I used to program a lot (Basic, Pascal, COBOL, Fortran). I dabbled a little bit in VisualBASIC about five years go, but it was really a hack. Now, I really have a burning desire to write some applications for my Android phone, but I really don't know anything about all the new programming technologies (OOP etc). I'm looking for a good book that will teach me modern programming using Java and the Android platform.
I've seen good books on learning Java 6 and some good books on programming Android (but they all seem to assume you know Java or C), but nothing that seems to combine the two. I'd really like to learn Java right on the Android platform to begin with if possible. I know there are a lot of resources available online but unfortunately much of the time that I will spend on this endeavor is when I won't have internet access so a good book would go a long way.
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May 5, 2010
Can I do Android Programming in C++ ,C ? Code...
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Oct 14, 2010
I have a little idea of the Utility Classes with a slight doubt on demand.
If I use a Utility class in my Application than to use that class in my main Activity do I have to create the object of that class or I can directly Import that class in my main activity?
In the nutshell, all I want to be clear about is that basically how can I use the utility class in my Main Activity?
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Jan 3, 2010
In theory, Dalvik executes any virtual machine byte code, created for example with the compilers of
AspectJ
ColdFusion
Clojure
Groovy
JavaFX Script
JRuby
Jython
Rhino
Scala
Are there already working versions of bytecode compilers for Dalvik available for other languages than Java?
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Mar 14, 2014
I have recently developed android application using server socket programming My problem is this its running show slow.
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Jun 3, 2013
I just want to make android dictionary app with only over a thousand of words. I have the list of words and their meanings in Word Microsoft office . I have installed all the android packages i need. Do i need to know a lot about java to make this dictionary? I dont know anything about programming but i just want to make this app. how do i start about programming dictionary? Any webs/ tutorials similar to programming dictionary?
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Sep 24, 2010
I may be doing some Blue tooth Serial Port programming work for a client and I'm just looking for some tips in determining complexity/ workload. The work is similar to reading from a blue tooth GPS (not making the phone a blue tooth GPS), but it is some custom hardware, so not exact. Here's what (I think) I know so far: I will need to pair devices with a Serial Port Profile. I need to connect using a Bloodsucker which works on Android 2x -I don't know yet if the Android I will be a server or a client in this scenario. I will open an InputStream (no output stream needed) and have a thread continually blocking for input I believe "BluetoothChat" is the best example to start with. What I would want to know. - Are there devices/manufacturers who block the blue tooth serial port, trying to block tethering or something like that? (-I've seen posts here that imply that, but I don't see a bunch of comments like "Doesn't work on my @#$$" in Blue tooth GPS Providers in the market). -Are there going to be hardware specific oddities, or can I develop with my Nexus One and just hope it works on everything else? -Is pairing something that will require a lot of education for the users, and would a good app try to initiate this inside their app, or just assume it is already done. -Is Blue tooth programming going to be my worst nightmare, like it sometimes was on Windows Mobile, or smoother than I could ever hope?
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Nov 14, 2009
I'm beginning to learn mobile programming on the Android platform. I'm up for working with any particular base SDK. I just want to hear some suggestions from the community about what types of applications I should start with to help learn more advanced interactions with the platform.There are of course the Standard Hello World, calculator, etc. But by now I am bored with all of those.What do you all make when learning a new language?
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Feb 28, 2009
I am trying to stream mp4 file and play through programming. I got the following error:
E/PlayerDriver( 25): HandleErrorEvent: type=-11 E/PlayerDriver( 25): Content is truncated. E/MediaPlayer( 908): Error (-11,0)
and played for 10 seconds, and nothing has happened.....
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May 8, 2010
I've recently knocked up a server/client app for Windows & Android that allows one to send a file from Windows to an android phone over a socket connection. It works great for a single file but trying to send multiple files over in a single stream is causing me problems. I've also realised that aside from the binary data, I will need to send messages over the socket to indicate error states and other application messages. I have little experience with network programming and and wondering what is the best way forward.Basically the C# server side of the app just goes into a listening state and uses Socket.SendFile to transmit the file. On Android I use the standard Java Socket.getInputStream() to receive the file. That works great for a single file transfer, but how should I handle multiple files and error/messaging information? Do I need to use a different socket for each file? Should I be using a higher level framework to handle this or can I send everything over the single socket? Any other suggestions for frameworks or learning materials?
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Mar 2, 2009
I want to play .m4v file which is on some server . When I am trying to play the file, I am getting error, E/MediaPlayer( 2092): Error (-1,0) and nothing is happening.
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Jun 9, 2009
I have written a small example which plays youtube videos. the code is: startActivity(youtubeIntent = new Intent(Intent.ACTION_VIEW,Uri.parse (youtubeUrl))); but I got the alert as "sorry, this video is not available". how to play youtube videos in android device by programming?
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Jun 19, 2010
I am new to Android app. development. I need to change the existing style at runtime or can create new styles at runtime and I need to apply it for my buttons and textviews.
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Dec 3, 2009
I need to implement JNI Programming in android environment. SO if anybody knows about JNI programming in android.please let me know or if you found any useful links or information about this concept please send me .
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