Menu
▾
▴
Re: [Linuxsampler-devel] Noise at approx 128 voices or greater
|
From: Doug G. <dou...@gm...> - 2023-02-12 10:10:37
|
<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Further to my previous post stating that the version was 2.2.0, this is as reported when launched and corresponds to the package version generated by the Debian build process. However the source was copied from GitHub on the 30th Dec 2022.<div><br></div><div>I’m not sure why this differs from the GitHub indication of 2.2.1 which has been the case for 3 years. Also LS reports a build date of 9th May 2021, which should also be 30th December 2022.</div><div><br></div><div>A little odd but I suppose it to be a bug in the Debian build.<br><br><div dir="ltr">Sent from my iPad</div><div dir="ltr"><br><blockquote type="cite">On 11 Feb 2023, at 9:03 pm, Doug Gray <dou...@gm...> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr">Christian,<div>Thank you for responding to my issue. </div><div>I have made a short recording of the 'noise' I hear and attached a link to the audio. It sounds to me more like the output audio stream being filled with erroneous data rather than background noise aggregation. </div><div>Also I omitted to mention that the LS version is 2.2.0.svn</div><div>I'd be grateful if you could review and comment on the audio. Note the recovery at the end of the clip - as the active voices decrease below ~120 and the buffers clear.</div><div>Thanks,</div><div>Doug</div><div><br></div><div><a href="https://www.dropbox.com/s/8onanduqhdo3g33/230211-202402.mp3?dl=0">https://www.dropbox.com/s/8onanduqhdo3g33/230211-202402.mp3?dl=0</a><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 11 Feb 2023 at 05:27, Christian Schoenebeck <<a href="mailto:sch...@li...">sch...@li...</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Wednesday, February 8, 2023 12:58:17 PM CET Doug Gray wrote:<br> > Hello,<br> > I have patched and compiled linuxsampler for Raspberry Pi 4 4Gb with arm64<br> > PiOS (Debian) running a 6.1 Realtime patched Kernel. In every respect<br> > this system is running very well with only one issue. Whenever it exceeds<br> > 128 (or thereabouts) Voices the audio starts to include noise like tipping<br> > rice grains into a metal bowl. The noise persists and gets worse as the<br> > voice count increases until the voice count drops below ~120 the noise<br> > ceases and linuxsampler continues normally. No voice stealing is occurring<br> > during this<br> <br> It's not you, it's the sample library. Samples have a ground noise which is <br> typically inaudible when only playing one sample at a time, but when you play <br> hundreds of samples simultaniously that ground noise becomes indeed audible as <br> the noise adds up with each sample. So it's a matter of the signal to noise <br> ratio (SNR) of the original audio hardware being used for the recordings.<br> <br> Today's audio interfaces have a much better SNR than decades ago, that's why <br> you would not hear the noise with more recent sample libraries, at least with <br> like ~100 voices.<br> <br> CU<br> Christian<br> <br> <br> <br> <br> _______________________________________________<br> Linuxsampler-devel mailing list<br> <a href="mailto:Lin...@li..." target="_blank">Lin...@li...</a><br> <a href="https://lists.sourceforge.net/lists/listinfo/linuxsampler-devel" rel="noreferrer" target="_blank">https://lists.sourceforge.net/lists/listinfo/linuxsampler-devel</a><br> </blockquote></div> </div></blockquote></div></body></html> |
