[Kenwood] PSK31 and sound card sampling rate.

Thu, 4 Apr 2002 09:37:20 -0800

Very true, but you will have problems if the application is written to only use a sample rate that the sound card doesn't support.  There are some (mostly older, I think) sound cards and drivers that will not support 8khz sampling.  Almost all will support 11.025khz since that's 1/4 the 44.1khz standard rate of CD audio.

The application should be written so it tries 8khz, and then falls back to 11.025khz if it's not available.

 - Dave

> -----Original Message-----
> From: David Cook [mailto:[email protected]]
> Sent: Wednesday, April 03, 2002 10:15 PM
> To: [email protected]
> Cc: 'Cyberia'
> Subject: RE: [Kenwood] PSK31 and sound card sampling rate.
> 
> 
> The capabilities of your sound card should not be confused 
> with the sample
> rates that a given application supports.
> 
> 73,
> -- Dave, WA0TTN
> http://www.netdave.com/wa0ttn
> 
> > -----Original Message-----
> > From: Cyberia [mailto:[email protected]]
> > Sent: Wednesday, April 03, 2002 8:19 PM
> > To: [email protected]
> > Subject: Re: [Kenwood] PSK31 and sound card sampling rate.
> >
> > ----- Original Message -----
> > From: "David Cook" <[email protected]>
> > To: <[email protected]>
> > Sent: Wednesday, April 03, 2002 10:15 PM
> > Subject: RE: [Kenwood] PSK31 and sound card sampling rate.
> >
> >
> > > Hi John, sorry to disappoint you but the sampling rate is
> > usually buried
> > in
> > > the guts of the DSP code.
> >
> > I think this really depends on who makes the card and what 
> OS you are
> > running. The Soundblaster Live 5.1 that I'm using is capable
> > of sampling
> > rates of 8.0, 11.025, 16, 22.05, 24.0, 32.0, 44.1 and 48 KHz.
> > The card came
> > with lots of spiffy apps that ran under Win98, one of which
> > was capable of
> > adjusting the sampling rate. Then I converted this machine to
> > XP. All of
> > those apps are gone now it seems. I can't figure out how to 
> adjust the
> > sampling rate now, unless I use the windows media recorder -
> > which is a
> > kludgy way to do anything. So I just leave the sampling rate
> > set to the
> > default (44.1K) and use the creative mixer to control the
> > amplitudes of the
> > two busses (record and playback). I'd like to get all those
> > creative apps
> > running again...
> >
> > ---------------
> > If one's words are no better than silence,
> > one should keep silent.     -  Kwai Chang Caine
> >
> >
> >
> >
> 
> - - -
> 
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