Re: Suggestions on Reducing Microphone White Noise?
- I meant to respond to this thread a long time ago that the problem was
not Twinkle, but the brand of headset (Sony DR-260) that I have. It
does not work well with alsa.
(I was delayed as I've moved three times (and two countries) since I
started this thread.)
Thanks to jOERG, Michel and everyone for their help.
I'll start a new thread for my current hiccup with Vonage.
--- In firstname.lastname@example.org, "joerg.greoj"
> --- In email@example.com, Jeff Hill <jh@> wrote:
> > It does seem strange to me that both speaker and microphone are
> > both on
> > the same device, plughw:1,0 or /dev/dsp1, but that's apparently
> > configured correctly.
> thatï¿½s a strange concept of /dev/dsp and -i assume- therefore in
> ALSA as well to have 2 independant streams in "one" device (which in
> fact are two devs, speaker and mic). Probably the original designers
> thought of audio to be sort of a tty or something.
> there is/was just one argument to implement audio this way: itï¿½s
> easy to handle synchronization resp. sharing one clock-generator for
> A/D and D/A. Much the way you set the baudrate for /dev/ttySx. Very
> early and cheap sound"cards" might have had only one programmable
> clock, so two devices with their own method to set sampling-rate
> were cumbersome. There even were circuit diagrams for DIY audio-HW
> to plug to serial or centronics port. Maybe thatï¿½s why...
> > -----------------------------------------------------
> > Diagnostic Output:
> > thor:~$ arecord -vv -d 6 --rate=8000 --device="plughw:1,0"
> > Recording WAVE 'hiss2.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
> > Plug PCM: Linear conversion PCM (S8)
> try -f s16_le, this sample is u8 (or S8 ?). Have a look to twinkle
> ï¿½s log to set further parameters to the exact values used by twinkle
> when opening alsa
> please read this posting,
> set up mic device accordingly and check the recorded mic file for
> hiss. if there is any, please send file to joerg.twinklephone AT
> gmx.de. i like to hear exact type of noise. maybe you can include
> excerpt from twinkle.log