Four track digital audio recorder and USB audio interface. Dual Neutrik XLR/TRS combo jacks support both mic-level and +4 dBu line-level. These inputs can accept balanced microphone or line level from Mixers or the FOH console. The microphone preamp includes +48 V phantom power and plenty of gain for detailed recordings with condenser microphones, as well as electret type microphones. Using the stereo built-in microphones, you can capture ambient sound of the audience while recording direct from an external console, which is ideal for capturing live performances. DR-40X allows high-quality recording with its stereo built-in condenser microphones. Every detail is captured from small whispers to loud sounds up to 125 dB SPL. These built-in microphones are adjustable unidirectional microphones for recording in an X-Y pattern for tight stereo imaging, or in an A-B pattern for a more ambient recording. The layout of the DR-40X has been revamped to be quick and easy to work with one thumb. Operations like recording, adjusting levels, deleting bad takes and adding markers are just a button press away. DR-40X uses only three AA batteries and has ultra-long battery capability. When using built-in microphones, recording lasts 18 hours when recording with standard 2ch WAV, 44,1 kHz/16 bit format using alkaline batteries. Also DR-40X can be powered by a USB mobile battery as well for super long extended use. Connecting to a PC using USB Audio interface mode, and DR-40X becomes a tool for voiceover work, live streaming and songwriting with studio-quality audio. Built-in microphones work as USB microphones. Writing down what you hear – Easier said than done, but it is actually easy with DR-40X. In addition to its capability to capture crisp voice recording, DR-40X can help you with its Jump back function, variable Speed function and equalizer preset for human voice. In addition to normal stereo channel recording and Dual Recording mode, DR-40X has “4CH Mode” that can record two different stereo feeds simultaneously. The combination of the sources are flexible; recording the built-in microphones along with a pair of external Mics such as close-up and ambient microphones, or recording the built-in Mics along with a balanced line input such as the feed from a mixer along with the sound in the room. Film-makers and videographers often experience sudden audio volume spikes during filming. An actor could suddenly scream, or a documentary subject could do almost anything. DR-40X has a Dual Recording mode that captures a copy of your take but at a lower level, as a safety track in case of sudden distortion. Also, Auto recording function can detect the sound input signal level and automatically start recording. The Pre-recording function with up to 2 seconds pre-record provides fail-safe protection. Peak Reduction works in rehearsal mode or in record. Even if the sound or performance is louder than the sound check you’re safe. Combined with Auto level and Limiter for preventing distortion, you never have to worry. If you don’t like the last part of a phrase you just recorded with your guitar, or if you change your mind and want to rephrase narration, the “Overwrite mode” is exactly what you need. Overwrite mode allows punch-in recording from a desired point. It is destructive editing with one level of undo. The overdubbing function allows for Overdub Recording while playing a previously recorded file. This allows you to record other parts such as a guitar solo over a recording previously made such as at a rehearsal studio. Overdubbing creates a new file, leaving the original file unaffected, making it easy to re-record. DR-40X support a SDXC card, which can record longer with larger data capacity. If you record one stereo file in 44,1 kHz/16bit CD quality, 128 GB card holds 192 hours maximum. In MP3 320kbps, it can record up to 896 hours.