Detailed Guide to The Best Audio Interfaces for the iPad. You will find all the information you need on iPad Compatibility, Power Consumption, Input Compatibility Mic Preamp Quality and more. This guide also contains a list of the interfaces most highly rated by the music and audio community.
Akai Professional LPK25 25 Key USB-MIDI Controller Keyboard. The LPK25 is primarily intended as a portable device and that's the feature that most reviewers rated most positively particularly by laptop and MacBook users. For a Detailed Guide to The Best 25-Key MIDI Controller Keyboards see https://www.gearank.com/guides/best-25-key-midi-controller-keyboards
A Detailed Guide to The Best USB Microphones for Recording & Podcasting. In addition to a list of recommended USB mics based on ratings by the recording community this guide explains topics such as The Differences Between USB and XLR Mics, Condenser & Dynamic Mics, Zero Latency Monitoring and iPad USB Power Issues.