M-AUDIO DMAN - Manual (Page 6)

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Full duplex: the ability to record and playback at the same
time. If you are using a multi-track digital recording program,
such as Samplitude, SAW, or Cakewalk Audio, this is a very
important feature. Full duplex would, for example, allow you
to hear previously recorded vocal tracks while you’re recording
the harmonies.
MPU401 : a standard for MIDI interfaces, developed by Roland
Corporation, back in the early days of MIDI. This is the most
common PC MIDI interface under DOS. Under Windows, MPU
type interfaces run in UART (sometimes called “dumb”) mode.
Windows Sound System (WSS): Microsoft released the
Windows Sound System audio adapter in 1992. Its features
include a 16-bit stereo A/D converter, 16-bit stereo D/A
converter, data compression and de-compression, analog audio
mixing, microphone and line-level input, line-level output and
a high-throughput system interface.
Digital Audio Features of DMAN
• 16 or 8 bit stereo digital audio recording and playback.
Selectable sampling rates from 5.3 kHz to 48 kHz
•
Interrupt and DMA driven simultaneous recording and
playback.
• Dynamic range exceeding 80 dB with digital interpolation
filter and dynamic filtering programmable according to
sampling rate.
• 16-bit hardware ADPCM, µ Law and ALaw compression and
de-compression.
• Software-selectable input source with individual mute and
volume control. Mixing of various audio sources (Stereo Line-
in, Stereo Aux Input, Stereo Wave Synthesis music – via
daughterboard connector, and Internal DAC) for recording.
• Software-controlled output mixing of all audio sources with
individual volume controls.
• Master volume control with up to 64 dB of attenuation (in 64
attenuation steps of 1 dB each).