SpectrumView Plus vs JuLearn

SPECTRUMVIEW PLUS Visualise, in real time, the frequencies that you can hear around you and even those you cannot with SpectrumView Plus, your dynamic audio companion for iPhone, iPad, and iPod Touch. SpectrumView provides a high-quality, real-time spectrogram and spectrum analyser display, with a configurable sample rate and frequency resolution. You can use this application to measure the highest tones you can sing, obtain visual feedback of the frequencies in your speech, identify an annoying sound, calibrate musical instruments and all sorts of acoustic analysis. Here's what it can do for you: · Refresh Spectrogram. Allows users to refresh the spectrogram so that it clears the spectrogram that had already been displayed. · Change min and max scale. Allows users to set their own minimum and maximum scale value on the spectrogram and spectrum analyser view, in both linear and log scale. · Set Recording filename. Recording filenames are editable and the suffix can be set to have an incremental value or date/time. · Generate snapshot of the spectrum data from playback and live recordings. · Access recordings and snapshots using the "Files" app. All the data can be easily accessible using the "Files" app that is available from iOS 11. · Web File Transfer. Allows you to access your files from another device using a web browser. · Logarithmic scale. Allows you to set either linear or logarithmic frequency scales in the Spectrogram and Spectrum Analyser views. · Peak hold. Allows you to freeze and hold the peaks of the frequency envelope (three holds in three distinct colours) in Spectrum Analyser mode. · Save location. Never forget where a clip was recorded – uses the devices location services. · Auto lock disabled. During playback and recordings auto lock is disabled to prevent the device from automatically locking (if enabled), for uninterrupted recording/playback · Multiple selectable sample rates from 8,000 Hz to 48,000 Hz · High-frequency resolution with configurable signal analysis window lengths or Fast Fourier Transform (FFT) orders. · Sound intensity represented using a colour spectrum scale from -96 dBFS to 0 dBFS. · Frequency Pinch-to-Zoom. Allows you to zoom into the frequency space to look at a specific tone or frequency. · Recording and Playback of Audio Files. Provides a fully functional audio recorder that allows you to record, pause and play back files in high-quality, uncompressed, wave format. · Tap Data Cursor. Allows taps on any part of the Spectrogram or Spectrum Analyser display to obtain the exact frequency in Hertz (Hz) and level in decibels (dB) at that point. · Musical Notes or Frequency Display on Tap. Selectable frequency or musical pitch notation to obtain the cent-accurate musical note e.g. A4 (22), when the display is tapped. · Live Spectrogram and Spectrum Analyser Views of Recorded Files. Files recorded can be played back and the Spectrogram and Spectrum Analyser modes can be used to review the audio. · Sharing Recorded Files by Email or iTunes File-sharing. · High Quality Screenshots. · *Improved* Soundcloud support. Audio files can be uploaded to or downloaded from Soundcloud as well as being able to post audio to Facebook. · *NEW* Import audio from videos in your device library. · Fullscreen mode. Hide the menu at the bottom of the screen to get even more of the screen dedicated to frequency analysis. · Selectable spectrogram colour scales. You can now select one of 7 colour scales for your spectrogram. · Selectable window functions. You can now see the window function options provided. · Apply gain. A maximum of 24dB gain can be applied to make ‘hard to see’ details easier to view. · Open In. Audio files can be directly opened in SpectrumView. View files sent by email directly in SpectrumView.

JuLearn: Master Julia Programming Learn Julia from the fundamentals to advanced scientific computing with a structured, hands-on learning experience designed for developers, researchers, scientists, and data professionals. JuLearn brings tutorials, coding practice, flashcards, reference tools, and daily challenges together in one app. Learn at your own pace, track your progress, and keep studying anywhere with full offline access. COMPLETE JULIA LEARNING EXPERIENCE • 12 in-depth learning units from core syntax to advanced scientific computing • 100 coding exercises per unit to reinforce key concepts • 250 focused Julia learning topics covering essential programming skills • 1,200 flashcards across 12 Julia units • Julia Cheatsheet for quick syntax and concept reference • Comprehensive lecture notes with practical examples • Daily Julia coding challenges • Progress tracking throughout your learning journey • 12 interface themes • Support for 8 interface languages • Full offline access • No ads, subscriptions, or hidden fees LEARNING UNITS 1. Julia Programming Fundamentals 2. Control Flow & Logic 3. Functions & Methods 4. Collections & Arrays 5. Type System & Custom Types 6. Metaprogramming 7. Julia Symbolics 8. Data Science Tools 9. Linear Algebra 10. Parallel Computing 11. Julia Tensors 12. Scientific Computing BUILT FOR HANDS-ON LEARNING Each unit combines clear explanations with practical Julia code so you can move from understanding a concept to applying it. • Syntax-highlighted code examples • Step-by-step explanations • Practical scientific computing examples • Best-practice tips • Visual learning aids • Color-coded sections for easier navigation • Coding exercises designed to strengthen retention WHAT YOU'LL LEARN • Work confidently with Julia syntax and the REPL • Understand Julia's type system and multiple dispatch • Build functions, methods, arrays, and custom types • Work with data analysis and scientific computing workflows • Explore symbolic mathematics and tensor operations • Use metaprogramming for flexible code generation • Understand concurrent and parallel computing concepts • Apply linear algebra and numerical computing techniques • Develop stronger habits for writing clear, efficient Julia code MADE FOR • Developers learning Julia • Data scientists and analysts • Researchers and academics • Scientific computing professionals • High-performance computing engineers • Machine learning practitioners • Numerical analysts and mathematicians • Scientists moving from Python, MATLAB, R, or other technical computing environments LEARN ANYWHERE JuLearn works offline, so your tutorials, exercises, flashcards, notes, and reference materials are available whenever you want to study. ONE-TIME ACCESS Download once and get the complete learning experience with no subscriptions, no recurring fees, and no advertising. Start learning Julia with JuLearn and build practical skills for scientific computing, data analysis, numerical programming, and high-performance technical workflows.