Question

Hi, can the AudioBox 1818VSL or Studio 192 interfaces be used to slave to the Adat of an Apollo for the extra mic/line inputs, or does it have to be the Master?

Answer 1

The 1818VSL nor the Studio 192 will work as a stand alone preamp. These must be connected to a computer to be used.

You can use the Digimax DP-88 with the UA Apollo however there is a small issue with that configuration.

For 44.1K and 48K operation, the DP88 is a good pair with the UA Apollo, you can use the MIDI Ports to control the pre-amps with the DP88. However for SMUX operation at 88.2K and 96K where you only get channels 1-4 due to the higher sample rate, the UA Apollo must be Wordlock Slave to the DP88. UA is aware of this issue.

Answer 2

This might work with T.O.S.LINK.  - the presonus DP88.  It will expand a studio 192 (master) as a slave so might work as a slave to the Apollo.  The Studio 192 (which I use) is the master which is served by the DP88 slave to offer an extra 8 mic channels to the Studio 192.

However, I am only guessing by what I know the 192 can do and what I understand the DP88 offers.  I have only ever used Presonus gear so cannot advise you as to the Apollo.  

I hope that helps you out.