On 7 February 2015 at 03:52, Didier Dambrin <di...@skynet.be> wrote: > It was just several times the same fading in/out noise at different levels, > just to see if you hear quieter things than I do, I thought you'd have > guessed that. > https://drive.google.com/file/d/0B6Cr7wjQ2EPub2I1aGExVmJCNzA/view?usp=sharing > (0dB, -36dB, -54dB, -66dB, -72dB, -78dB) > > Here if I make the starting noise annoying, then I hear the first 4 parts, > until 18:00. Thus, if 0dB is my threshold of annoyance, I can't hear -72dB. > > So you hear it at -78dB? Would be interesting to know how many can, and if > it's subjective or a matter of testing environment (the variable already > being the 0dB "annoyance" starting point)
Yep, I could hear all of them, and the time I couldn't hear the hiss any more as at the 28.7 second mark, just before the end of the file. For reference this noise blast sounded much louder than the bass tone that Nigel posted when both were normalised, I had my headphones amp at -18 dB so the first noise peak was loud but not uncomfortable. I thought it was an odd test since the test file just stopped before I couldn't hear the LFO amplitude modulation cycles, so I wasn't sure what you were trying to prove! All the best, Andy > -----Message d'origine----- From: Andrew Simper > Sent: Friday, February 06, 2015 3:21 PM > To: A discussion list for music-related DSP > Subject: Re: [music-dsp] Dither video and articles > > Sorry, you said until, which is even more confusing. There are > multiple points when I hear the noise until since it sounds like the > noise is modulated in amplitude by a sine like LFO for the entire > file, so the volume of the noise ramps up and down in a cyclic manner. > The last ramping I hear fades out at around the 28.7 second mark when > it is hard to tell if it just ramps out at that point or is just on > the verge of ramping up again and then the file ends at 28.93 seconds. > I have not tried to measure the LFO wavelength or any other such > things, this is just going on listening alone. > > All the best, > > Andrew Simper > > > > On 6 February 2015 at 22:01, Andrew Simper <a...@cytomic.com> wrote: >> >> On 6 February 2015 at 17:32, Didier Dambrin <di...@skynet.be> wrote: >>> >>> Just out of curiosity, until which point do you hear the noise in this >>> little test (a 32bit float wav), starting from a bearable first part? >>> >>> >>> https://drive.google.com/file/d/0B6Cr7wjQ2EPucjFCSUhGNkVRaUE/view?usp=sharing >> >> >> I hear noise immediately in that recording, it's hard to tell exactly >> the time I can first hear it since there is some latency from when I >> press play to when the sound starts, but as far as I can tell it is >> straight away. Why do you ask such silly questions? >> >> All the best, >> >> Andrew Simper > > -- > dupswapdrop -- the music-dsp mailing list and website: > subscription info, FAQ, source code archive, list archive, book reviews, dsp > links > http://music.columbia.edu/cmc/music-dsp > http://music.columbia.edu/mailman/listinfo/music-dsp > > > ----- > Aucun virus trouve dans ce message. > Analyse effectuee par AVG - www.avg.fr > Version: 2015.0.5645 / Base de donnees virale: 4281/9068 - Date: 06/02/2015 > -- > dupswapdrop -- the music-dsp mailing list and website: > subscription info, FAQ, source code archive, list archive, book reviews, dsp > links > http://music.columbia.edu/cmc/music-dsp > http://music.columbia.edu/mailman/listinfo/music-dsp -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp
