Tascam DM-3200 Owner's Manual

Also see for DM-3200: Quick reference Manual Software guide Application guide Release notes

Contents

3 – Connections : Digital connectionsTASCAM DM-3200 User’s Manual 41Digital I/O setupAfter the connections have been made, the inputs andoutputs can be set up for use.Press the DIGITAL key (ROUTING with the ALT indi-cator lit) so that the SETUP screen appears:This screen allows the viewing and changing of theparameters relating to the two digital audio inputsand outputs as well as the three built-in TDIF con-nectors.There are a number of on-screen DETAIL buttonswhich, when pressed, show a popup with details ofthe word length, sampling frequency data format, etc.of the appropriate input or output.Digital inputs The word length (16BIT or 24BIT)and the input selected using the routing screens (XLRor RCA) are automatically determined and displayed.Also, in the case of a “double-speed” input (that is,88.2 kHz or 96 kHz), the display shows HISPEED, oth-erwise it shows NORMAL.The DM-3200 includes a frequency converter, whichis capable of taking an input frequency of 44.1, 48,88.2 or 96 kHz (±6%) and converting it to the projectfrequency. Use the on-screen FS CONVERT button toturn the converter on and off.NOTEThe signal from any input used with a sampling fre-quency converter cannot be used as a sync clock source(see “Clock setting” on page 44).The 24bit Fix checkbox allows the input of 16-bit dataat these connectors and removes any inconsistenciesassociated with spurious status information, fixingthe word length at 24 bits.Mute Defeat The Mute Defeat checkbox shouldnormally be left unchecked. In the event of bad digi-tal audio data being received (out of range, or cor-rupt, etc.), the DM-3200 will usually mute the inputto prevent possible damage to monitoring equipment.However, this automatic muting can be turned offwith this checkbox. Some AES/EBU sources pro-duce data which does not quite conform to the AES/EBU standards, and will cause the DM-3200 to rejectthese sources, and mute the input, even though suchdata is actually valid.Note that an appropriate popup appears if invalidaudio data is received, informing you of the type oferror and the input at which the bad data is received.The output channels are determined automatically(either as stereo or 2 x mono) according to the outputrouting (see “Output routing” on page 49, but the for-mat is set between AES/EBU and S/PDIF using the dialand ENTER key.The TDIF inputs automatically detect sampling fre-quency, etc. but you may want to set the word length(16, 20 or 24 bits) using the dial and ENTER. Notethat the three TDIF terminals can take different wordlengths.Stereo output Finally, the format of the outputfrom the stereo buss when it is routed to a digital out-put can be decided here. The word length can be setat 24 bits, or reduced to 16 bits.If the word length of the digital stereo buss is reducedto 16 bits, there are three options available: Truncate,Dither, and Noise Shape.A full discussion of the principles involved here isoutside the scope of this manual. Many of the booksfrom Focal Press provide excellent background infor-mation on digital audio, timecode issues, etc.Figure 3.3: DIGITAL SETUP screen