What’s changed in 3.1.7? PPM Frequency Correction and DAB Calibration: Now performed with fractional ppm values (1/100ppm). As a result, e.g. the RSP line of receivers run with a frequency error of about only 1e-8, after warmup of 30 minutes and a constant temperature. This is significantly better than the factory provided value. qirx_audio V1.3:…