Mnyb;695138 Wrote: > Will try with SoX as per andy c advice . > > But it is a healthy perspective to muck around with the " defect " > r8brain resampling too ;) > > Has anyone bothered blind testing algorithms :) I did indeed some testing :) I ended up with this setting (using it with frontah):
sox.exe input.wav -b 16 output.wav rate -b 92 -a -v 44100 dither -a -f low-shibata I give up audio content from above 20286Hz with this. With this setting aliasing happens but only above 20800Hz at a low level because the response is already pretty down there my testfiles show. Since my Transporter cuts from 20600 @44.1kHz it has no chance to be a problem. One advantage of this early filter is there is nearly no pre-echo but that was no criteria for me. You may have seen the pics i linked earlier that show the pre- and post-echoes of different approaches. This setting also gives me much less clipping as some ultra-steep attempts especialy by other vendors. Since clipping is a real problem that i stumbled across all the time this is very welcome. The sox dither options are well done also. Sox offers different noise shaped forms. I tried all by listening them insane loud and decided for the low Shibata. It has similar added noise i hear well balanced between some HF noise and lower frequency stuff. The Gesemann for example doesn´t fit me at all. Really strong high-pitched noise i hear with that. You may wonder why iZotope is so hyped. The noise it adds is very much low-frequency and sounds most comfortable at first but i don´t like it. There are much stronger shaped noise-shapes like High-Shibata that really seem to allow even lower noise-floors. But with these i am a bit cautious. The only time i ever was able to abx a downsampled 24/96 file was with some strong shaped dither. The thread is on Hydrogenaudio somewhere. I didn´t have the originals to do my own tests and used the given samples so this may not be exatly valid. -- Wombat Transporter (modded) -> RG142 -> Avantgarde Acoustic based 500VA monoblocks -> Sommer SPK240 -> self-made speakers ------------------------------------------------------------------------ Wombat's Profile: http://forums.slimdevices.com/member.php?userid=4113 View this thread: http://forums.slimdevices.com/showthread.php?t=93990
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