Dohroma @ 01/27/2013, 12:28
Please, if possible, describe your practical use options for this program. I will add to the header.
Well, such programs help everywhere where you need to quickly check the frequency response, or watch the spectrum of the signal in real time.
BUT!
First of all - forget about the use of the built-in microphone for this purpose! And, unfortunately, not always an external special measuring microphone (even the price more bucks) will correct the situation. The problem is that the ACH microphone entry on PDAs and phones is usually very uneven. This is done specifically or a digital filter in the codec chip, or additional elements outside it. In the first case, it is theoretically to fix the audio driver to write the desired number to the desired register codec, but here I am not a specialist - I can only give the address of the registers and what to write there (if you inform the type of codec chip). In the second case, a soldering iron helps, for example, in the ASUS A639 and A636 PDA (Windows Mobile Device), it is enough to fall a capacitor 0.1MKF parallel to the entry of the ADC.
Universal solution:
If the device supports OTG and USB Audio Classes - through an OTG adapter, connect an external USB sound card, the higher the quality - the better. Again I warn you: the minimum option is on the C-Media chip (it only has a challenge in the very edges of the range), even better something like Behringer 202. Belfish Chinese ignore the Chicken.
Further:
For acoustic measurements, a special measuring microphone is needed. And connecting with the available audio player.
So we spent on Hardwar. The money went wrong. What do we have and what can we?
First of all, it is useful to sound engineers and sound engineers. Quickly, for 15-20 minutes, you can rebuild soundly inspection equipment, taking into account the acoustics of the hall. Experienced professional sound engineers are all known, but they use more sophisticated Softin called Smaart (several thousand dollars, just). Well, for smaller events, this program is quite suitable (or Pocket RTA Ultra analogues under WinMobile, well, or there are others under iOS).
Further. Despite the 21st century, the cassette decks are still in the go (now it is mostly expensive, hundreds and thousands of dollars). With this program, you can quickly configure the cassette or coil deck (and response and throttle). For this, the measuring microphone is not needed.
In both cases, the source of pink noise will be required. It can be a hardware or software generator, or an entry on a CD or in the file (only if with compression - without loss, no mp3, etc.) Do not use as a source of pink noise Pocket RTA all options for WinMob - There it is implemented with an error.
Well, for a snack. Mentioned Dear and Professional Software SMAART works on BB under Windows, but already has an option for iOS (with some restrictions - no two-channel measurements). But about the cured version of Smaart under iOS I do not know anything.