RME ADI 8 has no Mic inputs, you would require a Mic preamp with (usually) balanced outputs.
If you have no separate mic preamp (what I assume), then its better to use one of these Mic preamp:
https://www.thomann.de/de/rme_octamic_ii.htm
https://www.thomann.de/de/rme_octamic_xtc.htm
The XTC has the special ability to be integrated into TotalMix FX like a channel strip, so that you can remote control most of its functions from the TM FX instance of the UC (Gain, Pain, Phantom Power, etc) and save the settings even digitally in the TotalMix FX snapshots, thats very comfortably.
An additional features of the XTC are:
- it can be connected via MADI if you would extend your solution at any later point with a MADI capable recording interface, which allows up to 8 devices à 8 channels at 44.1/48 kHz
- if you connect if later via MADI, then you do not MIDI cabling anymore for remote controlling the device as AUX device, because then you can do this via RME's MIDI over MADI feature
- the device can also act as format converter between Analog / AES / ADAT / MADI
- the device is class compliant so that you can connect it directly as interface to PC, MAC and also an iPhone
- if provides you 2 separate good quality phones outputs and routing capability at the device to decide what you want to hear on the phones output
- if offers to you 4 AES inputs and outputs via a special breakout cable that needs to be ordered separately and is available in different length. Also very useful if you want to intrgrate other devices later and if you run out of ADAT channels. Like i.e. for the integration of an ADI-2 Pro FS or whatever in that range
The Octamic XTC would directly give to you a lot of features and is phantastically integrated into TM FX as AUX device.
You would have two phones outputs which of course can also be used to connect other phones preamps with multiple channels.
EDIT: also it has useful option like PAD for the 1st four Mic inputs and the last 4 Mic inputs can also be used as Instr inputs.
All the 8 Mic inputs can also be used as line inputs.
The 2 phones outputs can also be used simply as 4 unbalanced line outputs.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub13