Visualised Audio vs PhoneCheck

Visualised Audio can classify single notes using monophonic pitch detection and visualise notes and harmonies. Visualised Audio can help you fine tune your playing technique by showing you how close to pitch you are. Visualised Audio can show you all the beautiful harmonics that your instrument is creating. Is there a difference between your $100 instrument and your $2000 instrument? Visualised Audio is a fun tool to use while you're practising scales as it's showing you what the notes look like and which harmonics lie on top of the fundamental pitch. If your instrument is creating strong harmonics you can use the slider at the bottom make the application less sensitive and thus help it classify the fundamental pitch instead of the harmonic. Left on the slider means less sensitive to harmonics. The default value should be good for most people. Since the application makes heavy use of the microphone it needs both access to it as well as a relatively quiet environment. Note - The classified note detected by the app Error - The deviation from the note in cents Clarity - How pure the signal is. This has nothing to do with error.

PhoneCheck helps you inspect a used phone before you buy it. Buying a second-hand device from a marketplace, reseller, or another person? Run a guided hardware inspection and check the most important functions before handing over your money. PhoneCheck walks you through practical tests and creates a clear inspection result based on the checks you actually perform. COMPLETE DEVICE INSPECTION Test important parts of the device through a simple guided process. Screen Tests • Touchscreen grid test • Multi-touch test • Dead pixel check • OLED and image retention check • Display brightness check Audio Tests • Main speaker • Earpiece • Microphone recording and playback Camera Tests • Rear camera • Front camera • Focus test • Flash and torch test Sensor Tests • Accelerometer • Gyroscope • Compass • Proximity sensor • Haptics and vibration Connectivity Tests • Wi-Fi and network connectivity • Bluetooth • GPS and location • Cellular connectivity PHYSICAL INSPECTION PhoneCheck also guides you through important checks that require visual or manual inspection, including: • Side and volume buttons • Charging port • Face ID or Touch ID • Screen condition • Back glass condition • Front and rear cameras • Speaker and microphone condition DEVICE INFORMATION View useful information available from the device, including: • Device model • Operating system version • Storage capacity • Available storage • Battery percentage • Charging status • Display information • Sensor and camera capabilities PhoneCheck uses public system APIs and does not claim access to restricted information that third-party applications cannot reliably obtain. CLEAR INSPECTION RESULTS After completing the inspection, PhoneCheck summarizes the results using easy-to-understand statuses: . Passed . Needs Attention . Failed . Skipped or Unavailable You can quickly see which areas performed correctly and which ones deserve a closer look before purchasing the device. RETEST PROBLEMS Found something suspicious? Run failed or questionable tests again without repeating the entire inspection. SAVE YOUR INSPECTIONS Keep previous inspection results on your device so you can review and compare devices later. BUILT FOR SECOND-HAND BUYERS PhoneCheck is useful when checking a device from: • Facebook Marketplace • eBay • Local marketplaces • Used-device stores • Refurbished-device sellers • Private sellers PhoneCheck reports only the results of tests performed using the app and user-confirmed inspection items. It does not guarantee a device's authenticity, ownership status, repair history, future performance, or overall condition.