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dhrebeniuk/RosaKit
LibRosa port to Swift for ability using same prepossessing logic in iOS/MacOS platforms
.package(url: "https://github.com/dhrebeniuk/RosaKit.git", from: "0.0.2")

RosaKit

RosaKit - LibRosa port to Swift for iOS and macOS platforms.

Library can generate Mel-spectrogram using Short-time Fourier transform (STFT) algorithm.

It's provide methods for calcualte Short-time Fourier transform window and Spectrogram.

Installation

Via CocoaPods:

pod 'RosaKit'

Goals

  • Generate Spectrogram for visualisations

  • Preprocessing steps for most Machine Learning models in Sound Recognition Sphere

Original Project:

https://librosa.github.io

melspectrogram:

https://librosa.github.io/librosa/generated/librosa.feature.melspectrogram.html

Usage in swift

You can use such code:


let rawAudioData = Data(...)

let chunkSize = 66000
let chunkOfSamples = Array(rawAudioData[0..<chunkSize])    

let powerSpectrogram = samples.melspectrogram(nFFT: 1024, hopLength: 512, sampleRate: Int(sampleRate), melsCount: 128)

Results of processing:

Please look in Examples

Default Gauge

Used in Applications:

Decibel Meter:

https://apps.apple.com/app/decibel-meter/id1361845683?mt=12

GitHub

link
Stars: 17
Last commit: 1 week ago

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