You're welcome. I think it needed it.
Now that we're in minor release phase and can pour as much of the fabulous work that people have done on SoX over the last nine years as we can into sox_ng, I have a question about SoX itself which I think belongs here. The sox_ng (or sox-ng) list is only for discussion of the mountain of cruft I've built on top of and around the code base we know and love.
This is about an issue I'm putting in myself for my own use case where I process a ripped enormous CD collection with a low-pass brickwall filter "sinc" at 15175Hz because a lot of the CDs clip as recorded and all the interesting musical information is below that frequency so it removes the harshest part of the cllipping.
When it gets to the data CDs with WMAs and stuff recorded at 22050 or 16kHz, sox dies saying the cutoff frequency is above half the sampling rate. But if a brickwall lowpass's cutoff frequency is above the Nyquist frequency it should be a no-op, a copy-through.
I've done for myself: where it checks for this case, I just set the cutoff frequency to half the sampling rate and it seems to work without blowing up but it's not right because if the cutoff is way above half the sampling rate, this erroneously fiddles with the top end for the edge effects I presume it has around the target frequency. But it *is* easy to implement.
My question is, to have the most SoXey result, would it be right to flip from sinc to a copy-through when that happens, and how difficult is it likely to be to implement?
Thanks, onwards... M _______________________________________________ SoX-devel mailing list SoX-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sox-devel
