Re: [Alsa-user] Aliasing due to resampling?

2006-07-26 Thread Thomas Hood
On 7/26/06, Bill Unruh <[EMAIL PROTECTED]> wrote: > Not just the analog but the whole electronics. designing a board so that > all the radiation from all of the other parts of the computer do not > pollute the sound signal is tough and is far more than just the chip. That may be the case, but all

Re: [Alsa-user] Aliasing due to resampling?

2006-07-26 Thread Thomas Hood
On 7/26/06, Thomas Hood <[EMAIL PROTECTED]> wrote: > On 7/26/06, James Courtier-Dutton <[EMAIL PROTECTED]> wrote: > > Take a look at the alc850 datasheet, it will tell you the dB gain range > > each control has. > Hmm.. As far as I can tell from the datasheet ( ftp

Re: [Alsa-user] Aliasing due to resampling?

2006-07-26 Thread Thomas Hood
On 7/26/06, James Courtier-Dutton <[EMAIL PROTECTED]> wrote: > Take a look at the alc850 datasheet, it will tell you the dB gain range > each control has. Hmm.. As far as I can tell from the datasheet ( ftp://61.56.86.122/pc/ac97/alc850/ALC850_DataSheet_1.4.pdf ) the volume controls are in two pla

Re: [Alsa-user] Aliasing due to resampling?

2006-07-26 Thread Thomas Hood
On 7/26/06, James Courtier-Dutton <[EMAIL PROTECTED]> wrote: > >> It could, even if the digital form of the signal is OK. Your card > >> may apply digital gain at the max setting (i.e. to allow you to > >> boost very weak signals). > >> > > > > Ah.. that's interesting. I take it that this is someth

Re: [Alsa-user] Aliasing due to resampling?

2006-07-26 Thread Thomas Hood
On 7/26/06, Alfons Adriaensen <[EMAIL PROTECTED]> wrote: > It could, even if the digital form of the signal is OK. Your card > may apply digital gain at the max setting (i.e. to allow you to > boost very weak signals). Ah.. that's interesting. I take it that this is something internal to the hardw

Re: [Alsa-user] Aliasing due to resampling?

2006-07-26 Thread Thomas Hood
> Did you check the levels of your soundcard's mixer ? The spectrum > shows a signal that's rather badly distorted... > The levels in alsamixer are all set to 100 -- can this cause clipping, and if so, would this account for the aliasing? I understand that clipping would cause distortion, but not

[Alsa-user] Aliasing due to resampling?

2006-07-25 Thread Thomas Hood
Hello all, I've been trying to record a log sweep using the following script: http://www.duffroomcorrection.com/wiki/Measure_Jack script It generates a clean sweep file, as can be seen in the pretty pictures below (the generated.* files, or msplaysweep.ogg). I didn't have room to put the wavs up

[Alsa-user] Extigy multi-channel output?

2006-03-26 Thread Thomas Hood
Hello All, I'm trying to setup my SB Extigy USB soundcard in ALSA so that it can be addressed as a 6-channel device. Has anyone done this, so I might copy their .asoundrc file? I wonder if it even possible to playback through anything other than the first two channels as apparently the card uses