Tascam MX-2424 Manual Update

Also see for MX-2424: Release note Instructions Quick reference guide Install guide Optional Hardware Installation Guide

Contents

- 20 -Menu 030: Timecode Muting OptionsSome console automation systems and MIDI sequencers have an adverse reaction to incomingSMPTE time code or MIDI Time Code at a non-standard speed. With version 2.0, Menu 030 offersdifferent “muting” options when shuttling at speeds other than playspeed.• “Normal”-operates as it always has. MX-2424 will transmit time code when it is shuttling at fastand slow speeds.• “Mute High Speed”-MX-2424 will mute the time code outputs when shuttling at high speed, butwill still output code when shuttling at a low speed.• “Mute Low Speed”-MX-2424 will mute the time code outputs when shuttling at low speed, butwill still output code when shuttling at a high speed.• “Mute High and Low”-MX-2424 will mute the time code outputs at low and high speeds.To complement these muting options, the MX-2424 will now transmit the MIDI Time Code FullMessage when the normal MTC Quarter Frame message stream has otherwise been muted. This willallow MIDI controllers to track the current MX position at all times. The MTC Full Message is bydefinition for display purposes only, and an MTC transmitter (here the MX-2424) is not considered tobe "running" unless the standard MTC Quarter Frame messages are being issued. Full Messages willbe transmitted at a maximum rate of one per 5 time code frame periods, and will not be sent if thetime code position has not changed.For Example: If set to mute time code, the MX-2424 will still send MTC positional information thatcan be read by a mixer’s time code display. However, the MX-2424 will not send MTC informationthat the mixer’s automation would chase. This would also be true of a MIDI sequencer.Menu 060: Word->AES PhaseIf you use AES/EBU as an input source and ALSO use Word Clock for your clock source, thereis now an option to switch the polarity of the incoming Word Clock.There are currently no standards which define the phase relationship between an AES/EBUdigital audio signal and a standard TTL word clock. This can cause clock discrepancies betweenvarious digital audio devices.To reduce this possibility, the MX-2424 can now "flip" the polarity of its word clock 180egrees.de MX-2424 has always used.“Low-High” describes the word clock polarity that th“High-Low” describes the "phase-inverted" method.[In technical terms: the “Low-High” word clock has its falling edge aligned with the AES3 "X"reamble, while the “High-Low” form has its rising edge so aligned.]pIf the TDIF option is installed, then the TDIF bus phase will "flip" along with the wordignals, thus preserving the correct phase relationship between word clock and TDIF.clockusystem aresIf you experience trouble locking the MX-2424's clock to other gear, experimentation with Men060 can often help. This problem is most likely to occur when some devices in thelocking to word clock, while others are locking to an AES/EBU or S/PDIF input.