Hi, I'm trying to convert a stream into a PCMBuffer and then use Shazam to match. Shazam always fails to match. I have a theory it "listens" to the playback at double speed or more. Starts from here: ... let format = audioEngine.outputNode.inputFormat(forBus: 0) guard let pcmBuffer = format.toPCMBuffer(frame: currentFrame) else {          return } session.matchStreamingBuffer(pcmBuffer, at: nil) Where toPCMBuffer is: extension AVAudioFormat {     func toPCMBuffer(frame: AudioFrame) -> AVAudioPCMBuffer? {         guard let pcmBuffer = AVAudioPCMBuffer(pcmFormat: self, frameCapacity: UInt32(frame.dataWrap.size[0]) / streamDescription.pointee.mBytesPerFrame) else {             return nil         }         pcmBuffer.frameLength = pcmBuffer.frameCapacity         for i in 0 ..< min(Int(pcmBuffer.format.channelCount), frame.dataWrap.size.count) {             frame.dataWrap.data[i]?.withMemoryRebound(to: Float.self, capacity: Int(pcmBuffer.frameCapacity)) { srcFloatsForChannel in                 pcmBuffer.floatChannelData?[i].assign(from: srcFloatsForChannel, count: Int(pcmBuffer.frameCapacity))             }         }         return pcmBuffer     } } AudioFrame is: final class AudioFrame: MEFrame {     var timebase = Timebase.defaultValue     var duration: Int64 = 0     var size: Int64 = 0     var position: Int64 = 0     var numberOfSamples = 0     let dataWrap: ByteDataWrap     public init(bufferSize: Int32, channels: Int32) {         dataWrap = ObjectPool.share.object(class: ByteDataWrap.self, key: "AudioData_\(channels)") { ByteDataWrap() }         if dataWrap.size[0] < bufferSize {             dataWrap.size = Array(repeating: Int(bufferSize), count: Int(channels))         }     } ... } and MEFrame is: extension MEFrame {     public var seconds: TimeInterval { cmtime.seconds }     public var cmtime: CMTime { timebase.cmtime(for: position) } }

I have the following situation: I took 3 audio files and generated a Shazam signature for each I created a custom catalog with these 3 signatures All 3 audio items have an identical 40 second intro When I create a SHSession with my custom catalog and try to match audio from that common intro section, the matcher returns on the delegate method session(_ session: SHSession, didFind match: SHMatch) - without exception - only 1 object in the match.mediaItems array. For example: if didFind is called once per second, for signatures A, B, C, I would get a random sequence like - A, B, A, A, C, C, B, A (it's different every time). According to the documentation, mediaItems should contain all 3 sounds represented by the signatures as possible matches: mediaItems - An array of the media items in the catalog that match the query signature, in order of the quality of the match. The catalog was built by loading the signature files from disk: let signatureData = try Data(contentsOf: sigUrl) let signature = try SHSignature(dataRepresentation: signatureData) let mediaItem = SHMediaItem(properties: [.title: sigName]) try customCatalog.addReferenceSignature(signature, representing: [mediaItem]) I tried matching: with session.matchStreamingBuffer(buffer, at: audioTime) (so sending the audio input directly to the matching session) by creating a signature of the recorded audio for different durations (from 3 to 15 seconds recording duration) and sending the signature to the matcher to session.match(signature). I also tried the async/await version, for the small chance of implementation differences between the two but I always, without exception, only get 1 item in the mediaItems array. Everything else seems to be working correctly - apart from matching within the common section. Does anyone have any suggestions about this? Is it expected behaviour or a ShazamKit bug?

Hi, I have built an app that is based on ShazamKit custom catalog. It works fine when I test it using the simulator. However when I deploy it on my ios 15.5 device, it does not work. It matches the first item and that it. It keeps calling the delegate but match is always equal to the first item.    func session(_ session: SHSession, didFind match: SHMatch) {     if let first = match.mediaItems.first {       if let mediaItemTitle = first.title {         if (title != mediaItemTitle) {           title = mediaItemTitle         }       }     }   }

I am trying to build a "Sing that Tune" game. For example: The app will tell the user to sing, "Row row your boat." The user will sing "Row row your boat" into the microphone. If the user's melody is close enough to the actual melody, the game is won. My question: Since I'm dealing with live audio that might be "correct" but not "exact," is the best strategy to use ShazamKit and an SHCustomCatalog, or is it better to use Create ML and sound classification? I know Create ML model can learn the difference between a baby and a firetruck, but can it learn the difference between a good guess and a wrong guess of a sung melody? Thank you, Eli

Hi, dear apple developers. Is there any full example about shazamkit for android developers? I've found that There is no full example about how to use shazamkit to build an android app propertly in WHOLE Internet(eg: github etc.).... the documentation below is missing a lot of information. https://developer.apple.com/shazamkit/android/ Especially how to associate MediaItem with signature. https://developer.apple.com/shazamkit/android/shazamkit/com.shazam.shazamkit/-media-item/index.html in swift we can use customCatalog.addReferenceSignature(signature, representing: [mediaItem]) but I can't see anything about it in kotlin So, is there more information about it?

Hello. I'm a beginner developer trying to release a music app. My app is, Use Shazamkit to provide information about music (such as album image of a song, music title and genre, etc.) that the user receives via audio. Through Apple Music API, provide information about music searched by users (such as artist image, album image, playlist image, title and artist name, genre, etc.). However, it was rejected by reviewers for the following reasons. 5.2.1(e) Legal: Intellectual Property - General Of course, I am a member of the Apple Developer Program, and even though I only used APIs and Kits provided by Apple, I was rejected due to copyright issues. For reference, my app does not have upload/download functions for audio and video, and does not include playback functions. How do I resolve copyright issues? Thank you.

Hi, I'm developing an app with ShazamKit and I'd like to check its license agreement in order to know what I can and what I can't do, but I can't find it anywhere. Is there any link where I can find it?

Hi all, I have an app that is playing music from http live streams using AVPlayer. Have been trying to figure out how to use ShazamKit to recognise the music playing but I just can't figure out how to do it :-( Works well with local files and microphone recordings, but how do I get the data from a stream that is currently playing??? Feels like I tried everything... Have tried to install an MTAudioProcessingTap but it doesn't seem to work on streaming assets even though I can get hold of the proper AVAssetTrack containing the audio. No callback with data are received? Bug? I can open the streaming url and just save the bytes to disk and that's fine, but I'm not in sync with what is playing in AVPlayerItem so the recognition isn't working with the same audio data as the user is currently hearing. Hmmm. Any suggestions and ideas are welcome. It would be such a nice feature for my app so I'm really looking forward to solving this. Thx in advance / Jörgen, Bitfield

Hi, I've been asked to develop a software for macOS that monitors daily 24/7 some streamings and logs the aired music. I'd like to use ShazamKit, by the way I don't know if I have to do something in particular in order to use it in a commercial app and I don't know if with so many requests I can hit some threshold (it could be 10 simultaneous streams, it could be 100 simultaneous streams, I don't know at the moment). Any info about that?

I recently released my first ShazamKit app, but there is one thing that still bothers me. When I started I followed the steps as documented by Apple right here : https://developer.apple.com/documentation/shazamkit/shsession/matching_audio_using_the_built-in_microphone however when I was running this on iPad I receive a lot of high pitched feedback noise when I ran my app with this configuration. I got it to work by commenting out the output node and format and only use the input. But now I want to be able to recognise the song that’s playing from the device that has my app open and was wondering if I need the output nodes for that or if I can do something else to prevent the Mic. Feedback from happening. In short: What can I do to prevent feedback from happening Can I use the output of a device to recognise songs or do I just need to make sure that the microphone can run at the same time as playing music? Other than that I really love the ShazamKit API and can highly recommend to have a go with it! This is the code as documented in the above link (I just added the comments of what broke it for me) func configureAudioEngine() { // Get the native audio format of the engine's input bus. let inputFormat = audioEngine.inputNode.inputFormat(forBus: 0) // THIS CREATES FEEDBACK ON IPAD PRO let outputFormat = AVAudioFormat(standardFormatWithSampleRate: 48000, channels: 1) // Create a mixer node to convert the input. audioEngine.attach(mixerNode) // Attach the mixer to the microphone input and the output of the audio engine. audioEngine.connect(audioEngine.inputNode, to: mixerNode, format: inputFormat) // THIS CREATES FEEDBACK ON IPAD PRO audioEngine.connect(mixerNode, to: audioEngine.outputNode, format: outputFormat) // Install a tap on the mixer node to capture the microphone audio. mixerNode.installTap(onBus: 0, bufferSize: 8192, format: outputFormat) { buffer, audioTime in // Add captured audio to the buffer used for making a match. self.addAudio(buffer: buffer, audioTime: audioTime) } }

Hi, I'm developing an android app that uses ShazamKit. I know that there is an hourly requests rate limit for the Apple Music API, but I can't find anything about ShazamKit. Is there also a rate limit for ShazamKit? If yes, how can I find it since I'm using the SDK and not doing direct call API?

The resulted matches from a custom catalog on both iOS/ Android are a bit delayed (1-3+ seconds) How to test? (iOS) Prepare AVAudioPlayer with recorded audio. Load custom catalog & listen to recorded audio from an external source. When a match is found, play recorded audio from the AVAudioPlayer at: predictedCurrentMatchOffset Result: 1-3+ seconds delayed matches Question How to improve or filter the resulting matches to be close if not exact to the external audio source? Experimental Filtering results by frequencySkew close to 0, does not minimize delayed matches. [{     "sh_audioStartDate" = "2021-11-24 12:34:42 +0000";     "sh_frequencySkew" = "2.222024e-05";     "sh_matchOffset" = "388.3738065670163";     "sh_score" = "4302.546";     "sh_speedSkew" = "0.0009712927";     "sh_title" = ItemTitle; }] Printing the matchedMediaItems, there is a “sh_score”, maybe we can experiment with? But it’s not a public property Best regards.

I'm trying to test ShazamKit on Android. In the following Kotlin snippet, I load apple-test-wav.wav - a 9 second long, 48khz, 16bit PCM WAV audio snippet of the Food Math example video - and attempt to match it against the FoodMath.shazamsignature custom catalog. This audio is not capture via a microphone, it's a clean sample directly from the video and I can't get it to match. The output is always: NoMatch Am I doing something obviously wrong here? override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) CoroutineScope(Dispatchers.IO).launch { searchCatalog() } } private suspend fun searchCatalog() { val file = context?.assets?.open("apple-test-wav.wav") if (file != null) { val bytes = file.readBytes() file.close() val signatureGenerator = (ShazamKit.createSignatureGenerator(AudioSampleRateInHz.SAMPLE_RATE_48000) as ShazamKitResult.Success).data signatureGenerator.append(bytes, bytes.size, System.currentTimeMillis()) val signature = signatureGenerator.generateSignature() val inputStream: InputStream? = context?.assets?.open("FoodMath.shazamsignature") if (inputStream!= null) { val catalog = ShazamKit.createCustomCatalog().apply { addFromCatalog(inputStream) } val session = (ShazamKit.createSession(catalog) as ShazamKitResult.Success).data val matchResult: MatchResult = session.match(signature) println(matchResult.toString()) } else { println("no input stream") } } }

This is first time I am developing android app using sdk provided by Apple. I want to integrate Shazamkit in my app but after going through all documents & steps, I got my private key, team id everything except "Public key" for token, as I am not able to create valid access token using jwt, I am not able to use ShazamKit. So if possible please let me know from where I can get this key or am I missing some step? Thank you in advance.