Apogee Digital has JAM, a studio-quality guitar interface to record, practice or jam anywhere using either an iOS device or your Mac computer. The current trend in audio interfaces is for them to not only work with multiple operating systems (MAC & PC), but also work with your iPhone, iPad or via the USB port of your computer. Jam is small enough to fit in a guitar case and provides an instant interface connection between any guitar/bass instrument. I like the LED metering for status/input level monitoring, the simple control knobs, instrument pre-amp gain up to 40dB—plenty of gain for low output piezo pickups, the 44.1/48 kHz and 24-bit A/D conversion plus the locking output connector. It sells for $99 MRSP. See http://apogeedigital.com.