"Flatness": DRC creates a correction filter against its target curve (flat, by default), but often a flat target can sound thin and, well, flat. So my flatness filter looks at the frequency response of the correction filter and inverts it, over ten steps; theoretically so that with flatness=0 the in-room response is relatively unchanged from the uncorrected version(correcting for phase and reflections but not correcting peaks), and with flatness=10 the in-room response should be really quite flat. (The flatness filter creation is a bit extreme in the current version, so flatness=0 actually exaggerates the room's bad points).
"NoCorrection" is a room-correction filter to correct frequency response (per the flat target) but without correcting phase or reflections; it's just a linear-phase filter matching the DRC-filter's frequency response. So NoCorrection should sound good but the proper correction filter should sound better... Volume, you're absolutely right. The DSP needs to reduce amplitude a few dB to avoid digital clipping. But there's also a perceived-loudness-equalization stage where it tries to keep "loudness" the same regardless what filter you throw at it; that loudness calculation is easily thrown off by excessive bass right now, meaning that if the correction filter emphasises bass a lot, the volume is lowered more than necessary. -- inguz ------------------------------------------------------------------------ inguz's Profile: http://forums.slimdevices.com/member.php?userid=1139 View this thread: http://forums.slimdevices.com/showthread.php?t=29927 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
