Do you think the G4 (maybe the new ones) + audio card capable of taking a signal from i.e. a synth in
an audio input, routing it in the mixer of logic audio, where will be added
EQ & effects, and taking that processed signal to an output for realtime
monitoring ?
Of course with a low latency.

I mean real time processed signal with some plug in in logic, nothing
recorded.

I plan an entire native 24 input solution based on new G4 and RME mutliface
cards, and I hope at least 4 band EQ + 1 dynamic per audio input, like my
02R does, everything monitored without latency, in order to replace it
definively (my 02R)

Please let me know if you made such kind of tests, and if this is reasonnalbe.

best regards

Your best solution to make your a dedicated Mixing Console (read: Not a sequencer) is to purchase a Creamware audio card. While their Mac drivers aren't to die for (This may have changed with the introduction of the new SCOPE FUSION Platform drivers) it is an audio card capable of 96K I/O and handles all of the DSP on the card using STDM on SHARC DSP chips. STDM is Creamware's own version of Time -Division - Multiplexing DSP which is the method used in the Pro Tools TDM systems, but for a third of the cost, however.

You can check it out at
http://www.creamware.de/en/Home/gate.asp

Hope this helps!

I know the creamware products but there is no automation, and some latency and clicks when you change the parameters of eqs & dynamics, and some noise on the monitoring outputs.

I need something more professional.

I have the RME Digiface and 2 ADI-8 AE's plus I use the SPDIF in of the Digiface.
So I only have 18 inputs not 24. I am running a G4/933.
I just tested 9 stereo ins with a Logic Compressor and a Fat EQ on each stereo input as a test. It used only about 20% of the computer processor.

I also have a powercore and UAD-1 card which gives me extra processing power plus great quality effects. If you can afford it I would recommend the Logic Control too, you will never miss the 02R.
If you want to go mixerless the RME is definitely the way to go!

The latency is the lowest of any ASIO based card on the market and the sound quality is amazing.

Matt

a good quality solution :

3 x apogee AD8000
Logic 5.2

24 ins
24 outs
adat/AES ( optionnal)

24 Inputs object under LogicAudio

I imagine your Apogee solution will be a little expensive compared to the RME multiface solution 'djcenter' is suggesting.

What audio card were you suggesting using with the AD8000? you didn't suggest one, protools perhaps?

Interesting extract from article comparing AD8000 and RME ADI-8DS below. I know I would be saving the US$15000 (for 24 ins).
Also AD8000 is 24bit 48k with 114 db dynamic range ADI-8DS is 24bit 96k with 117db dynamic range.

Under the headline 'The Upstart versus the Grand Master' the german magazine PMA (Production Management) tested Apogee's AD-8000 (around 7.000 US$) against RME's ADI-8 DS (around 2.000 US$), and came up with the following conclusion:
A win on points
In as far as the devices can be compared at all - the meaningful limits of any such comparison having been discussed above - there is a winner and one that will surprise many people. The RME ADI-8 DS not only offers a wide range of useful features, convincing functionality and many and diverse possibilities, but also outstanding AD and DA conversion up to 96kHz. When you consider the low price tag, all you can say is that this represents outstanding value for money, making it the clear points winner.
Apogee's AD-8000 also offers a wealth of unique features, from the AMBus system to the universal sync and clock options and the UV22 technology, but the actual AD conversion provided by the Apogee is open to criticism. For a reference device, these values could be better and in view of the high price tag one can expect to see an adaptation of the hardware to current developments.