Today’s featured promo on MacUpdate offers Sound Byte 3.4 for US$39.95 (49% off, retail $79). “Sound Byte is a computerized cart machine for the Macintosh. It is very similar to the so-called cart machines used at radio stations in the past. Each recording – a jingle, advertisement, etc, was on a cartidge, which could be quickly selected and played. Sound Byte brings the cart machine to the computer age. You can assign select up to 75 recordings per rack, and assign each to a button. Clicking on a button plays that recording. Multiple recordings can be played at the same time.” Sound Byte 3.4 requires Mac OS X 10.3.9 or later.