Real Time Analyzer for iPhone.nnNow you can have an accurate and powerful Real Time Analyzer RTA for free on your iPhone or iPod touch.nnThis is the free adsupported version of our popular and highly rated Studio Six Digital RTA app. It includes octave and 13 octave modes and iPhone mic compensation.nnUsing ANSI type 1 or better filters, this RTA is very accurate, even in this lite version, since it uses the engine from our full version. Use it to check your sound system, monitor audio, and adjust your car audio system.nnTry this out, and if you like it you can always upgrade to our full RTA version, or to AudioTools, which includes the full RTA and a lot more. nnAnd check out iAudioInterface, our professionalaudio test and measurement microphone, line input, and line output accessory made for iPod touch.nnThe full version of RTA, and the version in AudioTools, is adfree and adds Pink Noise generation, graph zooming, dBfrequency cursor, MaxMin bars, noise curve overlays, Save and Recall of 10 graphs, external mic support, overall SPL AC dB readout, and decay options including slower decay, and peak hold and average modes.nnn iPhone mic Frequency Compensation FilternnRTA uses a special frequencycompensation filter to flatten the iPhone mic. Make sure you select Internal on the setup page.nnRTA is designed by the same team that built the Audio Toolbox acoustic analyzer.nn Specifications and DevicesnnThe internal iPhone mic has a noise floor near 30 dB, and clips around 105 dB. So, be aware that this tool will NOT work in very loud environments, such as clubs or some concerts. RTA will work on firstgeneration iPhone, but always use the headset mic, as the builtin mic runs at a low sample rate. nnIf you have an iPod Touch 2nd generation, use a headset mic, and if you have a first generation iPod Touch, you must use one of the dockconnector microphones and be running OS 2.2 or later.n