Oscilloscope vs CrossOver Filter

"I use this for analog, and audio measurements. Attach an Apple USB adapter and a $40 stereo A-D converter available online, and my iPad is like a $300 O'Scope." -thymeout- Oscilloscope app is great for analyzing audio range signals, or learning oscilloscope measurement basics. The interface includes many standard oscilloscope controls, such as: triggering, time and voltage per division, signal measurement cursors, and more. The app incorporates a signal (function) generator capable of generating sine, square, triangle, and sawtooth waveforms of up to 22 KHz. Calibration to an external reference signal is supported, guaranteeing the accuracy of measurements. Input can be acquired via the built-in microphone or an external mic/probe connected to the headset connector. For best results, use an external audio interface connected to your device dock. This allows for standard audio equipment to be connected, as well as for dual channel input. Oscilloscope probes also be connected (using a BNC connector). When feeding external signals via probes, you should take care not to exceed 1V AC voltage. Currently iDevices support only AC input. For up-to-date information on feeding signals and currently supported audio interfaces, please visit http://oa.onyx3.com Feature Highlights: ● Real-time waveform display (60 FPS) ● Triggering modes: Normal, Auto, Single ● Set trigger level and pre-trigger time ● Dual channel signal generator ● Reference signal calibration ● Pause function to get a screen capture ● Export traces as text file for further analysis ● Measure signal data using cursors ● Use "finger pinch" on screen to set voltage and time base ● Double tap screen to enter Black Panel mode ● Three color themes to choose from ● XY mode for viewing Lissajous figures ● Frequency range 20Hz-22KHz ● iPhone X ready

Designs and simulates the Crossover Filter of your car stereo system or home in a simple and professional way at the same time. Features and Functions: • Crossover Filter Calculation for Two-Way 6 / 12 / 18 and 24dB / octave. • Crossover Filter Calculation for Tweeter to 6 / 12 / 18 and 24dB / octave. • Crossover Filter Calculation for Mid-range to 6 / 12 and 18dB / octave. • Crossover Filter Calculation for Subwoofer / Woofer to 6 / 12 / 18 and 24dB / octave. Ability to select the "Q factor of Merit" in Two-Way, Tweeter and Subwoofer / Woofer (Butterworth, Bessel, Chebyshev, Linkwitz-Riley and Linear Phase). • Zobel Circuit Calculation. • Speaker Attenuation Calculation. • "Check Projects" of filters already existing. • Notch Circuit Parallel Calculation. • Notch Circuit Series Calculation. • Calculating Resistances, Coils and Capacitors in series or parallel connections. • Calculation Speaker Cable Attenuation and Cable Resistance with selection of metal cable (Copper, OFC Copper, LC-OFC Copper, Tin-Plated Copper, Nichel-Plated Copper, Silver and Aluminium). • Conversion table for AWG / mm / mm2. • Signal Generator, slide to select the Frequency from 20Hz to 20KHz, Sweep Up and Sweep Down to 20Hz/20KHz, Ascending tones, Descending tones, Pink Noise and White Noise. • Assembly diagram of Crossover. • Generates PDF files or image files to share or save your project. • Sharing of projects through Mail, iMessage and Social networks. • Saving of project in Photo, iBooks, Note, Dropbox, Google Drive, Evernote, etc. • Printing of project.