Hi Cleiton!
I’d love to, but to do it, I have to have an MPX recording to start with.
Because all tuners are very different, and modify the station audio, there is no way to compare recordings made from the L/R outputs of the tuner. The recording must be FM Stereo MPX — that is, record the off-air signal *before* stereo decoding.
You can do this with a tuner with MPX (Composite) output. If you don’t have a tuner with composite output, most can be modified to do it. If you look inside the tuner and find the MPX decoder chip, you can search for the model number on google to find the data sheet, and then see if there is an MPX output pin on the chip. Then, connect this to a sound card with 192 kHz A/D converters, and record 192 kHz mono 16-bit.
You can for example use MpxTool to do this — http://mpxtool.com
If you do this, I can analyze the file properly, and then I can make a preset to match the sound.
Best regards,
///Leif