A single battery transmitter, useful for being a touch more discreet than the double battery SMDb, with identical audio and RF performance. The Lectrosonics SMB/E01 Beltpack Transmitter brings Digital Hybrid Wireless® technology to miniature transmitters in a configuration essentially for any wireless microphone application with a lavalier microphone. The input section features the unique servo bias input circuitry with a standard TA5M type jack for use with electret lavaliere mics, dynamic mics, or line level signals. A DSP-controlled analog audio limiter is employed before the A-D converter. The limiter has a range of more than 30 dB for excellent overload protection and a dual release envelope that makes the limiter acoustically transparent while maintaining low distortion. The limiter recovers quickly from brief transients, with no audible side effects, and also recovers slowly from sustained high levels to keep audio distortion low while preserving short term dynamics.