Largely as an
RTA and DB
meter.
It should serve that purpose, although I am not sure how accurate the included mics, response time (slow/fast) or band filtering is, but if you are not looking for regulatory or research/lab use these may not matter to you.
Polarity testing is also handy as there are a few old systems about that may or may not be in
phase.
Polarity and
phase are two different things,
polarity is a basic amplitude relationship and for sound systems is usually electronics or wiring related. Relative
phase is time related and in sound systems usually positional or processing related.
Phase is also frequency dependent, two sources will be in or out of
polarity at all frequencies but may be in
phase at one frequency and out of
phase by varying amounts at other frequencies. This sounds like semantics but the
point is that the PAA6 may be helpful for verifying
polarity in sound systems but I'm not sure it is the proper tool if you are wanting to
address phase as it relates to audio
system tuning.
The Studio Six Digital apps are interesting. Supposedly the iAudioInterface, which is required for the
THD+N measurement app and the planned SmaartMobile app, is to start shipping in less than two weeks, although it was originally scheduled for
release last year and is not compatible with the iPad (so apparently Andrew is back to the drawing board on something new before the product is even released). With Studio Six Digital having to deal with iPad compatibility issues along with getting the iAudioInterface and iProMic out and Rational
Acoustics having recently released
Smaart 7 and working hard to keep up with the initial rush of orders and related problems, I would not be surprised to see the SmaartMobile app get delayed from the planned mid 2010
release, perhaps even into next year.
Faber Acoustical and True Audio also offer several iPhone/iPod
acoustics and audio measurement related apps.