AVSpeechSynthesisProviderVoice audioFileSettings field

Question

Sebboe OP

Created 4w

Replies 1

Boosts 0

Participants 1

Hello,

the AVSpeechSynthesisVoice has a audioFileSettings attributes

 let utterance = AVSpeechUtterance(string: text)
utterance.voice = AVSpeechSynthesisVoice(identifier: voiceSelected!)
print("- voice \(utterance.voice!.audioFileSettings)")

["AVLinearPCMIsBigEndianKey": 0, "AVLinearPCMIsFloatKey": 1, "AVLinearPCMIsNonInterleaved": 1, "AVNumberOfChannelsKey": 1, "AVSampleRateKey": 22050, "AVFormatIDKey": 1819304813, "AVLinearPCMBitDepthKey": 32]

This is declared in

 AVSpeechSynthesisVoice {
	...
    @available(iOS 13.0, *)
    open var **audioFileSettings:** [String : Any] { get }
 
    @available(iOS 17.0, *)
    open var voiceTraits: AVSpeechSynthesisVoice.Traits { get }
}

How can we specify the audioFileSettings attributes in a AVSpeechSynthesisProviderVoice ?

Cause in AVSpeechSynthesisProviderVoice there is no such field

 AVSpeechSynthesisProviderVoice {
    open var name: String { get }
    open var identifier: String { get }
    open var primaryLanguages: [String] { get }
    open var supportedLanguages: [String] { get }
    open var voiceSize: Int64
    open var version: String
    open var gender: AVSpeechSynthesisVoiceGender
    open var age: Int
}

Regards

Boost

Answer 1

Sebboe OP

2w

Apparently audioFileSettings is filled inside AVSpeechSynthesisProviderVoice automatically because on iOS 17 these information is well present on AVSpeechSynthesisVoice.audioFileSettings without doing anything AVSpeechSynthesisProviderVoice side.

But on iOS 18.x it comes back empty

 @State private var voices: [AVSpeechSynthesisVoice] = []
 
 List(voices.sorted(by: { $0.name < $1.name }), id: \.identifier) { voice in
        print(voice.audioFileSettings)
}

 iOS 17.4
 
["AVNumberOfChannelsKey": 1, "AVLinearPCMIsFloatKey": 1, "AVSampleRateKey": 22050, "AVLinearPCMIsBigEndianKey": 0, "AVLinearPCMBitDepthKey": 32, "AVLinearPCMIsNonInterleaved": 1, "AVFormatIDKey": 1819304813]

 iOS 18.3.1 / 18.4
 
[:]

0

	let utterance = AVSpeechUtterance(string: text)
	utterance.voice = AVSpeechSynthesisVoice(identifier: voiceSelected!)
	print("- voice \(utterance.voice!.audioFileSettings)")

	AVSpeechSynthesisVoice {
	...
	@available(iOS 13.0, *)
	open var audioFileSettings: [String : Any] { get }

	@available(iOS 17.0, *)
	open var voiceTraits: AVSpeechSynthesisVoice.Traits { get }
	}

	AVSpeechSynthesisProviderVoice {
	open var name: String { get }
	open var identifier: String { get }
	open var primaryLanguages: [String] { get }
	open var supportedLanguages: [String] { get }
	open var voiceSize: Int64
	open var version: String
	open var gender: AVSpeechSynthesisVoiceGender
	open var age: Int
	}

	@State private var voices: [AVSpeechSynthesisVoice] = []

	List(voices.sorted(by: { $0.name < $1.name }), id: \.identifier) { voice in
	print(voice.audioFileSettings)
	}

	iOS 17.4

	["AVNumberOfChannelsKey": 1, "AVLinearPCMIsFloatKey": 1, "AVSampleRateKey": 22050, "AVLinearPCMIsBigEndianKey": 0, "AVLinearPCMBitDepthKey": 32, "AVLinearPCMIsNonInterleaved": 1, "AVFormatIDKey": 1819304813]