I've noticed that many of my AAC's ripped from CD-ROM using iTunes 4.1/QT 6.5.1 and read by FAAD2 using
config->outputFormat = FAAD_FMT_DOUBLE;
have a maximum amplitude in excess of 1.0. Is this expected? I thought that anything above 1.0 was clipped. These files play fine through iTunes/iPod...no sign of clipping.

Is this expected behavior?

Thanks for the help!

Dave

Well, clipping is meant to saturate the PCM value whenever it exceeds full-scale.

But with DOUBLE there's a huge headroom, so basically no need to saturate ever - makes sense no?

Saturation, dithering etc, can then be done when converting DOUBLE down to a less precise format.