Devices

The plugin holds a small table of RME interfaces for two things TotalMix does not tell it: the width of the preamp gain range, and the reference-level lists. Over Global OSC the interface is recognised from the device name TotalMix reports, and a trailing unit number such as “Fireface UCX II (1)” is ignored. For the classic input gain dial you pick it under Device.

Preamp gain range

Device	Gain range	Source
Fireface UFX II, UFX+, UFX III	75 dB	UFX II and UFX+ from RME’s product pages; UFX III inferred (same preamp family)
Fireface UCX II	75 dB	UCX II manual
12Mic / 12Mic-D	75 dB	RME
M-1610 Pro	75 dB	inferred
Fireface 802 / 802 FS	75 dB	inferred
Fireface UCX, UC, UFX	65 dB	UCX from RME’s product page; UC and UFX inferred
Babyface Pro / Pro FS	65 dB	Babyface Pro FS manual (TotalMix’s control spans 0 to 65 dB; the marketed 76 dB includes the PAD)
Fireface 400 / 800	65 dB	inferred
Babyface (original)	60 dB	inferred
unknown	65 dB (classic), 75 dB (Global OSC)	fallback

A wrong entry only changes how far a detent travels; the displayed value is always TotalMix’s readout.

Reference levels

Reference level is a list parameter on the FX & Dynamics action. The list differs by interface and by bus, and sometimes by channel, so the plugin resolves it per device and bus:

Device	Line inputs	Outputs	Source
Fireface UCX II	+13 dBu, +19 dBu	+4 dBu, +13 dBu, +19 dBu	UCX II manual, technical reference
Fireface UFX III	+13 dBu, +19 dBu	+4 dBu, +13 dBu, +19 dBu; +24 dBu on the XLR outputs 1/2 only	UFX III manual ch. 19.1 / 20.1
M-1610 Pro	+4, +13, +19, +24 dBu	+4, +13, +19, +24 dBu	inferred from RME’s level guide; order unverified
Fireface UFX, UFX+, UFX II, 802 / 802 FS, UC, UCX	−10 dBV, +4 dBu, Lo Gain	−10 dBV, +4 dBu, Hi Gain	UFX manual and UC product page; the rest by generation
Babyface Pro / Pro FS	−10 dBV, +4 dBu (TRS inputs 3/4)	none, output level is a hardware switch	Babyface Pro FS manual
unknown	plain numbers, not clamped

Lists are in rising order of 0 dBFS level, matching what TotalMix shows. Mic and instrument inputs have no level switch; TotalMix ignores a write to a channel that lacks one. Where one channel’s list is shorter than the bus list (UFX III TRS outputs vs. XLR), the plugin offers the longer list and TotalMix ignores the extra entry.

If your interface is missing or a list is wrong, please open an issue with the entries TotalMix shows for inputs and outputs, and it can be added.