Am 05.06.2013 16:11, schrieb Len Ovens: > > On Wed, June 5, 2013 2:34 am, edmund wrote: >> On Wed, 05 Jun 2013 01:21:19 +0200 >> Hartmut Noack <[email protected]> wrote: >> >>> Am 04.06.2013 02:43, schrieb Len Ovens: >>>> >>>> On Mon, June 3, 2013 8:02 am, edmund wrote: >>>> >>>>> What are you calling "uncommon" sample rates? Ubuntu Studio is for >>>>> multi media and in my case High res audio. Here we use 96 kHz and >>>>> 192 kHz sample rates. >>> Of course I have recorded in these samplerates also and in very few >>> cases it really makes a difference. Most notably to me was, that Alsa >>> Modular Synths sounds quite different at 96KHz. > > That is possible... but, the audio in and out of a computer even at 96Khz > is still limited to just over 20kHz. The differences you are hearing may > be as a result of the math at higher frequencies affecting what ends up in > the 20-20kHz passband.
Thats what I suspect also. Zynadd does sound a bit different also at higher rates and mst interesting: 1: Play some notes with AMS and record it at 96KHz 2: Do the same at 48KHz and compare: they will sound different. 3: now resample both recordings to 44.1/16 and compare again: they will still sound different Looks, like the samplerate of the recording does not cause the audible difference. The samplerate of the PCM-stream AMS is working with does. >>> >>>>> VLC player, >>> >>> Is made to play the audio, that is relevant out there, where people >>> listen to music that is mixed and mastered and that is: 48KHz Video, >>> 44.1KHz Audio and that is it. > The bluray standard is 192/24, you don't get anything extra for your > money, but it is the standard. Much of the audio on such music started > out as 48/16... (If it was on tape originally then 48/13 or less) > >>>> seems to play these formats too but it doesn't! >>>>> When I play a 80 kHz sine it is audible > > Shouldn't be, but then really there is no reason to play an 80k sine > through a computer because there are no known sound interfaces able to > reproduce signals of that frequency anyway. The analogue part of the chain > makes sure of that. > >> No I mean playing a 80 kHz sine (with a 192kHz sample rate) >> I made a number of sines with audacity and played them with VLC among >> other players, VLC produces ghost sounds with sine waves above a >> certain frequency. >> >> So paying music with VLC in that format makes you hear things you never >> heard before, great! Pity that the difference is fake and distortion >> rather then more music information. > > That would be whatever does the resample or down/upsample. However, there > is no (and shouldn't be anyway) program material (even bluray 192 sample > rate stuff) that has 80khz content anyway. Any of the mics one can buy > start to roll of around 18hz (even condenser mics). So any signals above > that are artificially created. Buy some analogue test equipment and test > it for yourself. See what the highest frequency is that you can import and > export with your sound card. There is an audible difference, but it is not > in audio at 80khz. > > Many audio programs use poor quality resampling BTW. VLC would depend on > it's libs. > > This is something to consider. There are a lot of video players, but they > depend on only a few codec libs. We should break down our choices based on > the underlying libs I think. > > > > -- Ubuntu-Studio-devel mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-devel
