Pitchy alternatives and similar libraries
Based on the "Utility" category.
Alternatively, view Pitchy alternatives based on common mentions on social networks and blogs.
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SwifterSwift
A handy collection of more than 500 native Swift extensions to boost your productivity. -
SwiftGen
The Swift code generator for your assets, storyboards, Localizable.strings, … — Get rid of all String-based APIs! -
R.swift
Strong typed, autocompleted resources like images, fonts and segues in Swift projects -
SwiftGen-Storyboard
The Swift code generator for your assets, storyboards, Localizable.strings, … — Get rid of all String-based APIs! -
Dollar
A functional tool-belt for Swift Language similar to Lo-Dash or Underscore.js in Javascript -
swift-protobuf
Plugin and runtime library for using protobuf with Swift -
DifferenceKit
💻 A fast and flexible O(n) difference algorithm framework for Swift collection. -
EZSwiftExtensions
:smirk: How Swift standard types and classes were supposed to work. -
Result
Swift type modelling the success/failure of arbitrary operations. -
DeepDiff
🦀Amazingly incredible extraordinary lightning fast diffing in Swift -
Device
Light weight tool for detecting the current device and screen size written in swift. -
WhatsNew
Showcase new features after an app update similar to Pages, Numbers and Keynote. -
SwiftLinkPreview
It makes a preview from an URL, grabbing all the information such as title, relevant texts and images. -
Codextended
Extensions giving Swift's Codable API type inference super powers 🦸♂️🦹♀️ -
SwiftyJSONAccelerator
macOS app to generate Swift 5 code for models from JSON (with Codeable) -
Playbook
📘A library for isolated developing UI components and automatically taking snapshots of them. -
ReadabilityKit
Preview extractor for news, articles and full-texts in Swift -
ObjectiveKit
Swift-friendly API for a set of powerful Objective C runtime functions. -
Compass
:earth_africa: Compass helps you setup a central navigation system for your application -
Bow
🏹 Bow is a cross-platform library for Typed Functional Programming in Swift -
Pythonic.swift
Pythonic tool-belt for Swift – a Swift implementation of selected parts of Python standard library. -
BetterSafariView
A better way to present a SFSafariViewController or start a ASWebAuthenticationSession in SwiftUI. -
SwiftPlantUML
A command-line tool and Swift Package for generating class diagrams powered by PlantUML
Appwrite - The open-source backend cloud platform
* Code Quality Rankings and insights are calculated and provided by Lumnify.
They vary from L1 to L5 with "L5" being the highest.
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README
Pitchy provides a simple way to get a music pitch from a frequency. Other than that it has a bunch of useful data structures, calculators and helper functions to work with notes, octaves and acoustic waves.
From Wikipedia:
Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale, or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies.
Table of Contents
Key features
- Get lower, higher and closest pitch offsets from a specified frequency.
- Get an acoustic wave with wavelength, period and harmonics.
- Create a note from a pitch index, frequency or a letter with octave number.
- Calculate a frequency, note letter and octave from a pitch index
- Find a pitch index from a specified frequency or a note letter with octave.
- Convert a frequency to wavelength and vice versa.
- Convert a wavelength to time period and vice versa.
Usage
Pitch
Create Pitch
struct with a specified frequency to get lower, higher and
closest pitch offsets:
do {
// Frequency = 445 Hz
let pitch = try Pitch(frequency: 445.0)
let pitchOffsets = pitch.offsets
print(pitchOffsets.lower.frequency) // 5 Hz
print(pitchOffsets.lower.percentage) // 19.1%
print(pitchOffsets.lower.note.index) // 0
print(pitchOffsets.lower.cents) // 19.56
print(pitchOffsets.higher.frequency) // -21.164 Hz
print(pitchOffsets.higher.percentage) // -80.9%
print(pitchOffsets.higher.note.index) // 1
print(pitchOffsets.higher.cents) // -80.4338
print(pitchOffsets.closest.note.string) // "A4"
// You could also use acoustic wave
print(pitch.wave.wavelength) // 0.7795 meters
} catch {
// Handle errors
}
Acoustic wave
Get an acoustic wave with wavelength, period and harmonics.
do {
// AcousticWave(wavelength: 0.7795)
// AcousticWave(period: 0.00227259)
let wave = try AcousticWave(frequency: 440.0)
print(wave.frequency) // 440 Hz
print(wave.wavelength) // 0.7795 meters
print(wave.period) // 0.00227259 s
print(wave.harmonics[0]) // 440 Hz
print(wave.harmonics[1]) // 880 Hz
} catch {
// Handle errors
}
Note
Note could be created with a corresponding frequency, letter + octave number or a pitch index.
do {
// Note(frequency: 261.626)
// Note(letter: .C, octave: 4)
let note = try Note(index: -9)
print(note.index) // -9
print(note.letter) // .C
print(note.octave) // 4
print(note.frequency) // 261.626 Hz
print(note.string) // "C4"
print(try note.lower().string) // "B3"
print(try note.higher().string) // "C#4"
} catch {
// Handle errors
}
Calculators
Calculators are used in the initialization of Pitch
, AcousticWave
and Note
, but also are included in the public API.
do {
// PitchCalculator
let pitchOffsets = try PitchCalculator.offsets(445.0)
let cents = try PitchCalculator.cents(
frequency1: 440.0,
frequency2: 440.0
) // 19.56
// NoteCalculator
let frequency1 = try NoteCalculator.frequency(forIndex: 0) // 440.0 Hz
let letter = try NoteCalculator.letter(forIndex: 0) // .A
let octave = try NoteCalculator.octave(forIndex: 0) // 4
let index1 = try NoteCalculator.index(forFrequency: 440.0) // 0
let index2 = try NoteCalculator.index(forLetter: .A, octave: 4) // 0
// WaveCalculator
let f = try WaveCalculator.frequency(forWavelength: 0.7795) // 440.0 Hz
let wl1 = try WaveCalculator.wavelength(forFrequency: 440.0) // 0.7795 meters
let wl2 = try WaveCalculator.wavelength(forPeriod: 0.00227259) // 0.7795 meters
let period = try WaveCalculator.period(forWavelength: 0.7795) // 0.00227259 s
} catch {
// Handle errors
}
FrequencyValidator
With a help of FrequencyValidator
it's possible to adjust minimum and
maximum frequencies that are used for validations in all calculations:
FrequencyValidator.minimumFrequency = 20.0
FrequencyValidator.maximumFrequency = 4190.0
Error handling
Almost everything is covered with tests, but it's important to pass valid values, such as frequencies and pitch indexes. That's why there a re a list of errors that should be handled properly.
enum Error: ErrorType {
case InvalidFrequency
case InvalidWavelength
case InvalidPeriod
case InvalidPitchIndex
case InvalidOctave
}
Installation
Pitchy is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'Pitchy'
Pitchy is also available through Carthage. To install just write into your Cartfile:
github "vadymmarkov/Pitchy"
Author
Vadym Markov, [email protected]
Contributing
Check the CONTRIBUTING file for more info.
License
Pitchy is available under the MIT license. See the LICENSE file for more info.
*Note that all licence references and agreements mentioned in the Pitchy README section above
are relevant to that project's source code only.