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Closed 10 years ago.
hello i m new in iphone i just want to know how and which libraries can be used to change the pitch of the recorded audio in iphone.Now i m using dirac library to do this if there is any other way to implement this then please help me,...thanks in advance:)
As Sebastian said, use search. People will be unwilling to help if it seems like you have asked a question without doing much research yourself thus wanting the community to provide a complete solution.
That being said I actually had the same problem a while back, check out my question, it should provide you with enough general information in how to implement the particular solution I chose to take so that you can roll your own implementation.
Basically I recorded the audio with AVRecorder and changed the pitch, etc. with openAL. Best of luck.
[EDIT]
I just remembered this link. They are some tutorials for what you wish to achieve, I just wish I found them before I started doing my own implementation as it would have saved me a good bit of time. Best of luck!
check out this library: http://www.surina.net/soundtouch/
or this question: How to set pitch of an audio file or recorded audio file in iphone sdk?
also note: there is a search function here, AND on google :-) i just entered
objective-c change pitch of audio and those where the two topmost hits.
Related
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Closed 10 years ago.
I want to control the bass of song played by user from iPod music library.
I've searched on Google and got some AudioMixer samples which were of no help, but now I have got bass library i.e. libbass.a from http://www.un4seen.com/ which I think is quite useful.
But I don't know how I should adjust the bass of the song using slider.
Recently I got one more sample regarding this. But here the issue in this sample is I'm getting all equalizer's types like Dance, Pop, Rock, Bass, Jazz, Acoustic, Classical etc preset/predefined in an array given by AudioUnit Framework. But I want implement only bass in an slider. And you would must know that to implement any thing in slider we need values. But here in my case i'm not getting any value for anyone of those equalizer's preset types.
If you want to really bring out the bass on tracks played in the iPod, set your values to boost frequencies around 60-80 Hz, while cutting out some mids around 100-400 Hz. Dont forget to slightly increase highs as well, say around 2800 + Hz. I'm not familiar with how the software is set up, but from a studio artist's experience, the above mentioned frequency adjustments will take out any muddy or muffled sounds and really open up the low end. To handle what your asking: set your slider between 60-100 Hz.
Best of luck!
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Closed 10 years ago.
I've never programmed for an iPhone before, but have the coding experience to get by with learning Obj-C. I've been trying to come up with a good first project so that I can learn a little about the process involved with mobile development.
My idea was to make an app composed of 5 questions. Users would check off a box for each question representing "yes", "no", or "maybe", sort of like a survey. There would be a submit button at the end and the data would be sent to an email address. I figured the idea/concept was simple enough, but does anyone with iPhone experience think this is going to be too difficult to start with?
I really like the idea of creating a checklist in this first app, so any ideas related to that would be greatly appreciated. Not looking to make a usable app, just something to mess around with!
If you're just messing around to learn I suggest you pick up one of the many iOS books. A previous SO answer will have a list here.
Usually the books start out simply and explain to you really well what you're doing. They progress to more intermediate and 'advanced' topics and tutorials throughout the books and by the end you will have touched on many of the frameworks and API needed to get started on your own ideas.
Good luck!
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Closed 11 years ago.
I am a newbie iOS Developer. Could anybody point me in the right direction how can I develop pandora like app?
However, unlike Pandora, user should be able to view/play from the catalog or use recommendation engine. At this moment, I am not worried about recommendation engine. Basically, I want the app to be able to present sound file collection and play selected mp3 or entire album (play, pause, shuffle, repeat, etc). I want the melody catalog to be easily maintainable. I guess I will not store files locally. They have to be streamed from the server (HTTP Live Streaming?)??? The list will keep getting bigger and I will be the only person adding tracks.
What frameworks/libraries/documentation should I read up on?
Anyways, I learn better by doing it, so even though this is not an easy task, decided to take on it.
Thanks!
Good choice... learning by doing.
What I found useful in getting started with iOS was the online stanford class and the apple documentation concerning Audio:
Stanford Youtube Course
Apple Documentation
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Closed 11 years ago.
Can you auto take multiple pictures and then edit them in real time for an iphone app? Like say u want to make a video of a man and add a beard to him can you do it while streaming? the mustach moves according to where his face is detected and say take about 5-15 frames per second?
I guess you can.
It would involve tracking some facial features or markers added for the purpose at the least. However this is such a vast and complex field, you'll hardly get a single advice here that will get you going.
If you really mean it, I'd suggest looking for Augmented Reality libraries, there's a few out there. Most of them work by tracking a special pattern and not arbitrary features though, so be prepared for a big load of work.
Check this SO question for a first few hints, you'll find more information on the topic easily through the search engine of your choice.
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Closed 11 years ago.
I am interested in creating an auto tune app and did a bit of research and apparently thats now possible by using accelerometer that apple provides but I have no idea how to do that. can someone help out by giving me a link to a tutorial or give me an example code to change the voice inserted into the function.
Thanks in advance.
The accelerometer reports back physical acceleration of the device. This has absolutely nothing to do with digital signal processing of a recorded waveform, and as others said, there will be no easy way to do this. You can browse the audacity source (plugins specifically) to see algorithms having to do with time-stretching and will see that this is very complex. Not only is the science of the signal processing complicated, the art of getting it to sound good (at all) is incredible.