Once the BackTrack's memory is full, audio that has not been transferred into the Marked folder is overwritten, starting with the oldest material first. When connected to a computer, all the audio files show up in the Marked or Unmarked folders, and you'll also find a disk-image file in the BackTrack's memory for installing the Setup Utility software, which, in the case of the BackTrack + Mic, allows different setup parameters for the mic and instrument inputs. A single press of the Mark button moves the current take into a separate 'Marked' folder, where it can't be deleted by accident, and sections of the existing unmarked recording can also be copied into this folder if you find something you wish to keep. The pause settings can be customised using a Mac or PC computer and the included BackTrack Setup Utility software, whenever the BackTrack is connected via USB. The device cleverly splits up the recorded audio into separate files when a pause is detected. That equates to around two hours of recording time at 24-bit quality for the BackTrack and twice that for the '+ mic model - but if it's just ideas capture you're after, there are various other recording modes that trade quality for quantity, enabling the BackTrack to capture up to 12 hours of audio, and the '+ mic' model 24 hours. The basic BackTrack has a built-in 1GB memory and the BackTrack+Mic 2GB.
Both devices can record uncompressed 16- or 24-bit audio at 44.1kHz or 48kHz.
Many of the BackTrack's settings can be tweaked via the PC/Mac software over a USB connection.The BackTrack is actually available in two versions: the plain old BackTrack ( £74.75 $139.99) and the slightly more expensive, and beautifully descriptive, BackTrack+Mic ( £113.85 $209.99). Although there are numerous general-purpose Flash recorders around, this is the only one I've tried that is specifically designed for the guitar player. Where it differs from other Flash recorders is that it is designed to sit in-line with your guitar (it has an instrument input impedance) and it records everything you play as soon as audio is detected - unless you specifically ask it not to, by selecting the Play Only mode. It's affordable, cute and desirable, but what exactly is the Line 6 BackTrack? Essentially, the concept is based around a single-channel, Flash-memory audio recorder that's tailored to the needs of guitar players and songwriters.
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