I'm looking for a setup with 30 analog outputs sound card.
For now the only product I can see is the Motu 24io (2 of them), which seems to be out of date.
Any idea of another hardware?
Not aware of any single units that will provide that many analog outs (but happy to be wrong) Also, FYI Motu have updated their product range recently so something like 2 x 16A's or 24Ao units could fit the bill
Many professional external audio interfaces can be stacked or extended to get more inputs/outputs: RME, MOTU, Avid (Pro Tools HD), SSL, Apogee...
Some work by daisy chaining firewire or thunderbolt interfaces, others use a PCIe card with one of more dedicated digital multichannel interfaces that connect to rack hardware containing the analog inputs/outputs.
You could get a very solid 30 output system from RME using their MADI DA:
Not cheap though!