TASCAM Acoustic Control Microphone Filter with FREE! Recording Method GuideDesigned to minimize reflections and unwanted room ambience, the TASCAM TM AR1 helps to to manage what your microphone hears, giving you more control over your finished tracks. When using a microphone to record, the sound source generates two types of sound. One is called direct sound which enters the microphone directly from the source, and the other is called reflected sound which the sound it has been boucing off the walls, ceiling and back into