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I suppose there's a lot of tutorials everywhere on the proper way to play .mp3 music for your game on iOS, but is it possible to effectively play music at higher pitch in iOS?
What I mean with effectively, is not by loading the .mp3 file as a whole into memory, like when playing little bits of .wav files that are shorter than a few seconds. Unless, this kind of preloading is necessary for doing that?
OpenAl has pitch shifting with AL_PITCH.
more info about AL_PITCH and other methods here
Real-time Pitch Shifting on the iPhone
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I am developing a messaging app that allows me to send audio and calls, but I would like the voice not to be the original and to be modified by applying effects so that it is not recognized.
Do you know any library or any way that all the audio that enters through the microphone is modified to make the voice unrecognizable? In this way the audios and calls the voice that is heard is not the original, but with some effect.
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I am trying to determine the direction of an audio signal using the microphone on an iPhone. Is there any way to do this? As far as I have read and attempted, it isn't possible. I have made extensive models with keras and even then determining the location of the sound is shaky at best due to the number of variables. So not including any ML aspects, is there a library or method to determine audio direction from an iOS microphone?
No, in general it shouldn't be possible (Even with machine learning)--you need at least two points (and excellent timing) to determine a direction. You MIGHT be able to do something with multiple iPhones, but that would require very tight timing and some learning to determine where the phones are in relation to each other--and I doubt such a library already exists for the iPhone (existing libraries could be ported/adapted though)
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Hello I would like to add a few features to a video player, however I do not have enough time for writing the player itself. So does anyone know any open-sourced video player that plays .MOV extension videos through internet?
There are a number of open source video players available that you can check out. Here are some links:
http://openvideoplayer.sourceforge.net/
http://www.videolan.org/vlc/download-ios.html
https://github.com/ign/VideoPlayerKit
These should get you started but be aware that groking the code may take some time.
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I would like to know if there is any framework that supports sound analyze and do some action according to it. On the App Store, there is an app called Musical Light. It animates the lights during the music. Is there any framework that can support this?
Ok, here's what I've discovered:
The AVAudioPlayer has two methods: averagePowerForChannel: and peakPowerForChannel:
These values can be translated to the [0, 1] interval. So you can write a method to light on a light when the values reach a preset value.
Anybody else has any other idea to succeed?
CoreAudio, AudioToolbox, AVFoundation - all of them are in iOS SDK.
You can get some info about music track from its sound buffer, but all logic and analysis will be in your code.
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I want to Implement the Music Tracker as like below image.
I want to implement it in to the iphone. So is there any Music API or any Sound Library available to implement it in to iPhone ??
Please help me regarding this.
This isn't a 'tracker', but is a visual representation of the frequency domain for a given time period during playback.
You'll need a library that can do Fast Fourier Transforms (FFT) such as this.