Score one for standards. According to second-hand sources and a post to a public mailing list, the upcoming Apple iPad accessory adapter for cameras, the iPad Camera Connection Kit, will support audio interfaces that are compatible with the USB Audio Class. I don’t have official confirmation from Apple, and the adapter itself appears not to be shipping until later this month, so file this as “likely, but unconfirmed.” But it’s one to watch, and comes as a surprise to me. (Generally, camera accessory kits aren’t a way of providing audio expansion.)
Let’s assume, as these sources suggest, that USB audio devices were available via the standard stereo output (or even input) for the public Apple APIs for audio I/O. In that case, the other good news is that iPad apps would be able to support your third-party hardware without special modification of the software, or a signed hardware license agreement.
Most pro audio interfaces are not class-compliant; it’s more common to use custom drivers, even for USB 1.x-compliant interfaces. Custom drivers would be out of the question. But there are a number of interfaces that do provide class compliance, like the M-Audio Fast Track or Edirol UA-25. (I have a Cakewalk-branded, Roland-manufactured SPS-25 that works as a class-compliant device with the “advanced” mode on the back switched off.)
Read more: CreateDigitalMusic.com
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