Re: [Alsa-user] DC Offset on microphone input

2011-01-09 Thread IL'dar AKHmetgaleev
На Mon, 10 Jan 2011 08:28:30 +0200 Sergei Steshenko записано: >> http://akhil.homelinux.org/drop/a273/test.wav - this is a sample >> recorded with $ arecord -D hw:1 -c 1 -r 48000 -f s16_le test.wav >> >> At start and end microphone was muted and amplitude goes exactly at >> centre. But when mic

Re: [Alsa-user] DC Offset on microphone input

2011-01-09 Thread Bill Unruh
On Sun, 9 Jan 2011, Peter Nelson wrote: > On Sun, 2011-01-09 at 17:55 +0200, Sergei Steshenko wrote: > >> Why do you think your ADC converts from DC ? I.e. why do you think you >> have the DC offset in your recording ? >> >> Regards, >> Sergei. >> > > In my case, with two Intel "HDA" devices, th

Re: [Alsa-user] DC Offset on microphone input

2011-01-09 Thread Peter Nelson
On Sun, 2011-01-09 at 17:55 +0200, Sergei Steshenko wrote: > Why do you think your ADC converts from DC ? I.e. why do you think you > have the DC offset in your recording ? > > Regards, > Sergei. > In my case, with two Intel "HDA" devices, there is an offset to the recorded values which varie

Re: [Alsa-user] DC Offset on microphone input

2011-01-09 Thread Sergei Steshenko
On Sun, 9 Jan 2011 13:02:39 +0600 IL'dar AKHmetgaleev wrote: > На Sat, 8 Jan 2011 22:42:30 -0800 (PST) > Bill Unruh записано: > > > On Sun, 9 Jan 2011, IL'dar AKHmetgaleev wrote: > > > > > Greetins. > > > > > > I have USB headset which produces a little DC Offset when I'm > > > recording sound

Re: [Alsa-user] DC Offset on microphone input

2011-01-08 Thread IL'dar AKHmetgaleev
На Sat, 8 Jan 2011 22:42:30 -0800 (PST) Bill Unruh записано: > On Sun, 9 Jan 2011, IL'dar AKHmetgaleev wrote: > > > Greetins. > > > > I have USB headset which produces a little DC Offset when I'm > > recording sound. > > Windows magicaly corrects it even inside virtual machine. > > > > How can I

Re: [Alsa-user] DC Offset on microphone input

2011-01-08 Thread Bill Unruh
On Sun, 9 Jan 2011, IL'dar AKHmetgaleev wrote: > Greetins. > > I have USB headset which produces a little DC Offset when I'm recording > sound. > Windows magicaly corrects it even inside virtual machine. > > How can I remove DC Offset from my microphone input? Not sure what you mean. Do you mean

[Alsa-user] DC Offset on microphone input

2011-01-08 Thread IL'dar AKHmetgaleev
Greetins. I have USB headset which produces a little DC Offset when I'm recording sound. Windows magicaly corrects it even inside virtual machine. How can I remove DC Offset from my microphone input? As I know there is a lot cheap hardware which produces DC Offset. ---