Hello there!
Does anyone know how it’s possible to play an audio file within an iOS app below 25% (or 0% or even backwards). I can’t see how it’s possible to slow down audio below 25% when AVAudioNodes do not have the ability to set a rate below 0.25, and yet an app called AudioStretch is not only is able to do that, it can also play a point in time indefinitely and even play a song backwards? Unfortunately, I can’t seem to include a YouTube link to a demo on this post but if you do a search on YouTube for AudioStretch and, you’ll see a demo by Dream Theater musician Jordan Rudess.
How is this physically possible on iOS (especially that the song can play a moment in time forever, not just very very very slow)? Any insight would be greatly appreciated!!! I really want to implement these features on an iOS app I am working on but have not had any success!
Andres
Does anyone know how it’s possible to play an audio file within an iOS app below 25% (or 0% or even backwards). I can’t see how it’s possible to slow down audio below 25% when AVAudioNodes do not have the ability to set a rate below 0.25, and yet an app called AudioStretch is not only is able to do that, it can also play a point in time indefinitely and even play a song backwards? Unfortunately, I can’t seem to include a YouTube link to a demo on this post but if you do a search on YouTube for AudioStretch and, you’ll see a demo by Dream Theater musician Jordan Rudess.
How is this physically possible on iOS (especially that the song can play a moment in time forever, not just very very very slow)? Any insight would be greatly appreciated!!! I really want to implement these features on an iOS app I am working on but have not had any success!
Andres
To be able to use rates < 25%, you could use an AVAudioUnitTimePitch in your playback chain.
Please check: https://developer.apple.com/documentation/avfoundation/avaudiounittimepitch/1389380-rate
Please check: https://developer.apple.com/documentation/avfoundation/avaudiounittimepitch/1389380-rate
