Sony DMX-R100 Quick Reference page 107

2Fs Operation
The grayed-out boxes in these windows indicate functions that are available only when operating at single-speed
sample rates of 44.1 or 48 kHz. For example, the Audio Input Routing page shows that channels 25 - 48 are no
longer available and that there are four Aux returns, four Insert returns, and four External Monitor inputs. The
Audio Output Routing page shows that there are four MTR buses, two Aux sends, and four bus Inserts. Note
also that only the DMBK-R103 AES/EBU expansion card supports 2Fs sample rates. If you have any other
expansion cards installed in your DMX-R100 (such as, for example, DMBK-R106 or DMBK-R107 ADAT or
TDIF cards), their slots will be grayed out and therefore unavailable as sources in the Audio Input Routing
window and as outputs in the Audio Output Routing window.
Also, because four MTR buses are available when operating at 2Fs sample rates, "true" 5.1 surround mixing is
not possible — the SURROUND button in the MISC SETUP page is grayed out and, consequently, all icons in
the Surround Pan section are grayed out and unavailable. However, there are workarounds — albeit limited
ones — that still allow you to do surround mixing at 2Fs sample rates. For example, because the MTR PAN
controls (accessed by using the channel panpot when the fader is set to MTR mode in the FADERS section) still
enable you to pan between any odd-even pair of MTR buses, you could use MTR buses 1 and 2 to feed the
front left/right channels and MTR buses 3 and 4 to feed the rear left/right channels, and use Aux sends 1 and
2 to feed the center and subwoofer channels.
Finally, when operating the DMX-R100 at 2Fs sample rates, note that 5.1 monitoring must be accomplished
with external equipment. Future software updates will allow for 5.1 surround operation at 2Fs sample rates.
D-3
Appendix D Opperating The DMX-R100 At 2Fs