HomeAudioAudio Monitoring On The Canon T2i 550D With Sescom Cable: Running the Magic Lantern hack on your Canon EOS T2i / 550D camera and want better audio monitoring? Pay somewhere in the $40’s for the cable. Read on. Sescom DSLR-550D-HOCF AV Out Headphone Monitoring Cable for Canon T2i/550D DSLR & Magic Lantern USB Mini to 3.5mm TRS Female 1 Foot Magic Lantern Headphone Monitoring – Canon T2i and 5D MkII from Dennis O'Clair on Vimeo. Sescom DSLR-550D-HOCF Sescom DSLR-550D-HOCF AV Out Headphone Monitoring Cable for Canon T2i/550D DSLR & Magic Lantern USB Mini to 3.5mm TRS Female 1 Foot The DSLR-550D-HOCF was designed specifically for DSLR Canon T2i/550D users who employ Magic Lantern firmware in their HD DSLR video workflow. Magic Lantern on the T2i/550D enables the USB AV out port to be used for headphone monitoring during a recording, a must have feature for those serious about audio quality. This specialized cable provides an elegant and compact solution that eliminates the need for multiple adapters that are required with the standard AV out cable. USB mini to 3.5mm TRS Female 1 Foot. See Markertek for more solutions.