You simply overdrive RCA input and thats it. But, whatever, anyway.
viewtopic.php?f=4&t=23057For others & please correct me, if i missed something or get it wrong
There is 3 options in real life for streaming audio somewhat "correctly". For start- reason for all this mess is 10...12 dB offset between pro & consumer audio levels, also reduced or missing headroom. (Somewhat reminds me, how DJ's dealing with levels
)
a) mix in digital domain, get needed LUFS levels & use brickwall limiter @ -3dBTP, feed ATEM thru SDI or HDMI line (if MADI or AES/EBU not present)
By the way, did some testing today using old Ultrastudio Express- software mixing and using separate device for input works 100% with Logic Pro! So (somewhat) low budget full digital workflow can be done this way absolutely.
or (using analog in, no Fairlight present)
b) mix in analog or digital and set brickwall limiter @ +10 dB VU, feed ATEM so peaks hits -9 dBFS, rise level inside ATEM 6 dB. You get needed loudness and stay below -3 dBFS, also avoid analog input overdrive. For more comfort, feed console thru matrix/group out and trim it up there, if available. Also it is possible to use inline mastering processor (a la ultracurve pro or similar) and set brickwall to +10 dB VU here.
or, if Fairlight present (minis, TVS pro4k, Constellations etc), both digital/analog input
c) mix as normal, e.g. using nominal levels etc, in ATEM set brickwall limiter @-3 dBTP and use makeup gain.
Anyway, you need limiter somewhere in the end of signal chain in any case.