rbl;194876 Wrote: > I have set up my SB3 to use Inguz's DRC. However all I use it for is to > give a +4dB boost at 15Khz. However I find that if I play a pure sine > wave (have tried various frequencies, but say 100Hz) then it starts off > playing what sounds more like a square wave and in two steps gets better > to play what sounds like the proper sine wave. If I disable Inguz DSP in > filetypes the problem disappears. I have checked all settings are > disabled (incl room correction) except the boost at 15KHz. Oddly if I > turn this boost to 0dB the problem gets worse in that it takes longer > and more steps to settle to the true sine wave. > I am pretty sure the sine wave FLAC file is ok. > Any ideas?
I noticed this as well a while back. Now I disable Inguz before playing any pure tones. My guess is that the DSP algorithm just doesn't handle pure tones very well. It functions by taking a Fourier transform, boosting the 15kHz band by 4dB, and then FTing back. In this case there will be exactly zero power in the 15kHz band, and when it tries to boost 0 it must get in trouble somewhere. Maybe there's a division by zero somewhere in the algorithm, or maybe it tries to boost by a very large amount, clips, and then adjusts the gain down. -- opaqueice ------------------------------------------------------------------------ opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=34461 _______________________________________________ audiophiles mailing list [EMAIL PROTECTED] http://lists.slimdevices.com/lists/listinfo/audiophiles
