Internally, these files traditionally support two sampling rates and use specific biquad parameters (A1, B1, etc.) to define the curve.
For professional tuners, HP Tuners is the gold standard. You read the stock ECU file (which you can export as a .hpt file), modify the DDC tables, and write it back. HP Tuners allows full access to every table in the Viper’s ECU. viper ddc files
: DDC is a specific mathematical correction algorithm within ViPER4Android that is different from IRS (Impulse Response Sample) files, which are used for reverb or surround sound simulation. modify the DDC tables