On Tuesday 09 March 2004 18:15, Bill Unruh wrote: > On Tue, 9 Mar 2004, Casey Heshler wrote: > > On Tuesday 09 March 2004 01:48, Bill Unruh wrote: > > > On Mon, 8 Mar 2004, Casey Heshler wrote: > > > > On Tuesday 09 March 2004 01:20, Bill Unruh wrote: > > > > > On Mon, 8 Mar 2004, Casey Heshler wrote: > > > > > > On Tuesday 09 March 2004 00:45, Bill Unruh wrote: > > > > > > > On Mon, 8 Mar 2004, Casey Heshler wrote: > > > > > > > > > But PLEASE - before finally removing ALSA, record the type > > > > > > > > > of static/noise you get and place it somewhere for others > > > > > > > > > to download/diagnose. Otherwise you would have filed irate > > > > > > > > > complaint after irate complaint without anyone being able > > > > > > > > > to diagnose the issue with some helpful data. ;-) > > > > > > > > > > > > > > > > I would love for "someone" to hear what I am hearing - I can > > > > > > > > post a 10 second WAV file, but my concern is - how, and > > > > > > > > where, do I do this? Can I place the file in a "common" local > > > > > > > > location, and then post the target area??? > > > > Bill, didn't have ncftp, but I was able to follow your directions on the > > "ftp" - the file (wav) has been placed where you asked, and under the > > name you requested. Hope this helps with a little diagnosis... > > The file is at > ftp.theory.physics.ubc.ca/outgoing/heshler.wav > and can be downloaded via anonymous ftp. > > And teh noise really looks like noise. It has different levels in the > two channels, and is up to 40 bytes wide (10 samples) of consistant > level-- ie the signal level does not change much in that 40 bytesi-- > however the signal level in the two channels differs. It occurs in quiet > areas and in "full volume" areas. (The max amplitude of the signal is > about 50% of the max possible, and the noise spikes go up to about 25% > but with very varied heights.) It looks almost like some sort of > electical noise. > > Remind us again how this was recorded?
This sound clip was recirded with ReZound, but I get it with "any" recorder; Audacity, Sound-Recorder, and even KRecord - The sound clip is coming in from a cassette tape deck in through the "Line In" of the VIA Sound Card - with "Capture" set on the "Line In". The sound clip was "monitored" - i.e. I listen to the "Line In" while I record, and the noise is not in the sound at that time. I have the levels set to about 65% - I view and change the levels through AlsaMixer, AlsaMixerGUI, and - my preferance - KMix - This recording clip was done as a last ditch effort to eliminate possible "feedback" from other channles - I muted all channels except for IGain in KMix, or the "Capture" in the ALSA mixers, and still the noise, as apparent, was still introduced. I playback through a combination of players, preferance being ReZound because I think I need to change sample rates, from what I had problems early on, my sample rate for my sound card appears to use 48KHz. But, I also can use aplay, XMMS, ReZound, and Audacity for playback - most of the time I need to use a player that has a "visual" editor, because this "sound clip" is part of a 45 to 50 minute analog tape speach, that I one-pass to digitize, then second pass, strip out each speach, final pass is to remove pre and post silence and get the sound speach ready for cd audio burning. Which is they business I provide for my customers. Thank you Bill, for proving I am not insane, and that the noise is "real". Hopefully someone can resolve this - as I said before - this has "only" shown up since I changed to ALSA - it was not in my previous sound with Knoppix/Debian, and nothing has been changed in the sound system other than that. Casey ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
