Final answer:
The default channel type for the Master track in new sequences is typically set to Stereo, as it is the most common format used for a wide variety of playback systems.
Step-by-step explanation:
When setting up a new sequence on various audio and video editing software platforms, the default channel type for the Master track can usually be set to one of several configurations. Those typically include Mono, Stereo, 5.1 surround, or 16 Channel. More often than not, the default setting is Stereo, as this is the most commonly used format that provides a balance between spatial dimension and compatibility with a wide range of playback systems. While Mono is a single-channel and therefore only suitable for very specific purposes, 5.1 surround sound involves six channels used for home theater systems, and 16 channel audio is used for very complex audio setups that require multiple audio channels for input and output.