Where can I find an example of a Spectrum Analyzer implementation using MTAudioProcessingTap, in Swift?
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I have an app that plays some audio, using AVPlayer. I'd like to add a spectrum analyzer visualization to the app's UI.
I've found plenty of examples using FFTs to extract the spectrum data from audio samples, but I'm coming up empty trying to find an example that uses the data from an MTAudioProcessingTapProcessCallback (i.e. an example that doesn't use an AUGraph), and is also written in Swift.
I'm finding the syntactic magic dizzying for going back and forth between the underlying data and Swift's desire for safe typing, and many of the examples that attempt to extract data are explicitly setup using a full AUGraph, which isn't an option for me as I'm not in a position to rewrite my entire audio engine.
Is there some sample code out there that is written in Swift that can point the way? I feel like I've Googled everything I can think of and just can't find the right pieces to get it all sorted.
ios swift avfoundation core-audio
asked Nov 19 at 19:12
Jeff
2,94252431
add a comment |
up vote
0
down vote
favorite
I have an app that plays some audio, using AVPlayer. I'd like to add a spectrum analyzer visualization to the app's UI.
I've found plenty of examples using FFTs to extract the spectrum data from audio samples, but I'm coming up empty trying to find an example that uses the data from an MTAudioProcessingTapProcessCallback (i.e. an example that doesn't use an AUGraph), and is also written in Swift.
I'm finding the syntactic magic dizzying for going back and forth between the underlying data and Swift's desire for safe typing, and many of the examples that attempt to extract data are explicitly setup using a full AUGraph, which isn't an option for me as I'm not in a position to rewrite my entire audio engine.
Is there some sample code out there that is written in Swift that can point the way? I feel like I've Googled everything I can think of and just can't find the right pieces to get it all sorted.
ios swift avfoundation core-audio
asked Nov 19 at 19:12
Jeff
2,94252431
Is yourAVPlayerplaying a local or remote resource?
– Rhythmic Fistman
Nov 20 at 21:40
Local resources.
– Jeff
Nov 21 at 23:40
Local resources work withAVPlayer+ audio tap. I think you'll have to combine a swift audio tap example and spectrum analyzer yourself. I don't think I've seen an example that does both.
– Rhythmic Fistman
Nov 21 at 23:53
E.g. fft example: deezer.io/… audio tap example: github.com/gchilds/MTAudioProcessingTap-in-Swift
– Rhythmic Fistman
Nov 21 at 23:54
This gist does not use an MTTap for input, but does convert raw audio samples into a spectrograph using Swift: gist.github.com/hotpaw2/f108a3c785c7287293d7e1e81390c20b
– hotpaw2
Nov 24 at 1:01
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have an app that plays some audio, using AVPlayer. I'd like to add a spectrum analyzer visualization to the app's UI.
I've found plenty of examples using FFTs to extract the spectrum data from audio samples, but I'm coming up empty trying to find an example that uses the data from an MTAudioProcessingTapProcessCallback (i.e. an example that doesn't use an AUGraph), and is also written in Swift.
I'm finding the syntactic magic dizzying for going back and forth between the underlying data and Swift's desire for safe typing, and many of the examples that attempt to extract data are explicitly setup using a full AUGraph, which isn't an option for me as I'm not in a position to rewrite my entire audio engine.
Is there some sample code out there that is written in Swift that can point the way? I feel like I've Googled everything I can think of and just can't find the right pieces to get it all sorted.
ios swift avfoundation core-audio
asked Nov 19 at 19:12
Jeff
2,94252431
I have an app that plays some audio, using AVPlayer. I'd like to add a spectrum analyzer visualization to the app's UI.
I've found plenty of examples using FFTs to extract the spectrum data from audio samples, but I'm coming up empty trying to find an example that uses the data from an MTAudioProcessingTapProcessCallback (i.e. an example that doesn't use an AUGraph), and is also written in Swift.
I'm finding the syntactic magic dizzying for going back and forth between the underlying data and Swift's desire for safe typing, and many of the examples that attempt to extract data are explicitly setup using a full AUGraph, which isn't an option for me as I'm not in a position to rewrite my entire audio engine.
Is there some sample code out there that is written in Swift that can point the way? I feel like I've Googled everything I can think of and just can't find the right pieces to get it all sorted.
ios swift avfoundation core-audio
ios swift avfoundation core-audio
asked Nov 19 at 19:12
Jeff
2,94252431
asked Nov 19 at 19:12
Jeff
2,94252431
asked Nov 19 at 19:12
Jeff
2,94252431
asked Nov 19 at 19:12
Jeff
2,94252431
asked Nov 19 at 19:12
Jeff
2,94252431
2,94252431
Is yourAVPlayerplaying a local or remote resource?
– Rhythmic Fistman
Nov 20 at 21:40
Local resources.
– Jeff
Nov 21 at 23:40
Local resources work withAVPlayer+ audio tap. I think you'll have to combine a swift audio tap example and spectrum analyzer yourself. I don't think I've seen an example that does both.
– Rhythmic Fistman
Nov 21 at 23:53
E.g. fft example: deezer.io/… audio tap example: github.com/gchilds/MTAudioProcessingTap-in-Swift
– Rhythmic Fistman
Nov 21 at 23:54
This gist does not use an MTTap for input, but does convert raw audio samples into a spectrograph using Swift: gist.github.com/hotpaw2/f108a3c785c7287293d7e1e81390c20b
– hotpaw2
Nov 24 at 1:01
add a comment |
Is yourAVPlayerplaying a local or remote resource?
– Rhythmic Fistman
Nov 20 at 21:40
Local resources.
– Jeff
Nov 21 at 23:40
Local resources work withAVPlayer+ audio tap. I think you'll have to combine a swift audio tap example and spectrum analyzer yourself. I don't think I've seen an example that does both.
– Rhythmic Fistman
Nov 21 at 23:53
E.g. fft example: deezer.io/… audio tap example: github.com/gchilds/MTAudioProcessingTap-in-Swift
– Rhythmic Fistman
Nov 21 at 23:54
This gist does not use an MTTap for input, but does convert raw audio samples into a spectrograph using Swift: gist.github.com/hotpaw2/f108a3c785c7287293d7e1e81390c20b
– hotpaw2
Nov 24 at 1:01
Is your
AVPlayer playing a local or remote resource?– Rhythmic Fistman
Nov 20 at 21:40
Is your
AVPlayer playing a local or remote resource?– Rhythmic Fistman
Nov 20 at 21:40
Local resources.
– Jeff
Nov 21 at 23:40
Local resources.
– Jeff
Nov 21 at 23:40
Local resources work with
AVPlayer + audio tap. I think you'll have to combine a swift audio tap example and spectrum analyzer yourself. I don't think I've seen an example that does both.– Rhythmic Fistman
Nov 21 at 23:53
Local resources work with
AVPlayer + audio tap. I think you'll have to combine a swift audio tap example and spectrum analyzer yourself. I don't think I've seen an example that does both.– Rhythmic Fistman
Nov 21 at 23:53
E.g. fft example: deezer.io/… audio tap example: github.com/gchilds/MTAudioProcessingTap-in-Swift
– Rhythmic Fistman
Nov 21 at 23:54
E.g. fft example: deezer.io/… audio tap example: github.com/gchilds/MTAudioProcessingTap-in-Swift
– Rhythmic Fistman
Nov 21 at 23:54
This gist does not use an MTTap for input, but does convert raw audio samples into a spectrograph using Swift: gist.github.com/hotpaw2/f108a3c785c7287293d7e1e81390c20b
– hotpaw2
Nov 24 at 1:01
This gist does not use an MTTap for input, but does convert raw audio samples into a spectrograph using Swift: gist.github.com/hotpaw2/f108a3c785c7287293d7e1e81390c20b
– hotpaw2
Nov 24 at 1:01
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Is your
AVPlayerplaying a local or remote resource?– Rhythmic Fistman
Nov 20 at 21:40
Local resources.
– Jeff
Nov 21 at 23:40
Local resources work with
AVPlayer+ audio tap. I think you'll have to combine a swift audio tap example and spectrum analyzer yourself. I don't think I've seen an example that does both.– Rhythmic Fistman
Nov 21 at 23:53
E.g. fft example: deezer.io/… audio tap example: github.com/gchilds/MTAudioProcessingTap-in-Swift
– Rhythmic Fistman
Nov 21 at 23:54
This gist does not use an MTTap for input, but does convert raw audio samples into a spectrograph using Swift: gist.github.com/hotpaw2/f108a3c785c7287293d7e1e81390c20b
– hotpaw2
Nov 24 at 1:01