Using a WiFi router can create a more robust wireless network (relative to an 'ad hoc' network generated by your laptop), and provides the option to the use of directional WiFi antennae to isolate the signals coming from your iPhone or iPod touch.
TIP: By using your router to assign a static IP address to your iOS device and manually creating an entry for your iOS device in the Directory List of the MIDI Network Setup / MIDI Studio dialog on your mac, you will be able to connect immediately and reliably to your iOS device every time (without needing to rely on the 'Bonjour' wireless protocol). This is a very convenient setup if you are using WiFi regularly. Feel free to email us if you need help getting this setup.
For a router-based setup we recommend:
To get setup:
Ad hoc networks between laptops and iOS devices can get 'drowned-out' by mobile phone signals in live venues. The bigger the crowd the bigger this problem becomes.
In this scenario it is better to use a MIDI cable (eg iRig MIDI) from your iOS device to the MIDI target, or set up a special wifi router that can isolate your signals from the crowd, and is connected to your laptop via ethernet.