Re: [Alsa-user] dirty spectra

2007-10-13 Thread Gene Heskett
On Saturday 13 October 2007, Jonatan Liljedahl wrote: >Gene Heskett wrote: [...] >> The fall time of that computer generated sawtooth is probably 100x [...] >This was indeed it. Though I didn't know that a soundfile must not >contain any sharp discontinuities, I thought that the hardware would >

Re: [Alsa-user] dirty spectra

2007-10-13 Thread Jonatan Liljedahl
Gene Heskett wrote: > On Thursday 11 October 2007, Jonatan Liljedahl wrote: >> Jonatan Liljedahl wrote: >>> I'm having problems with distorted sound with ALSA. It's not >>> clipping distortion but more like a dirty spectra. The test I am >>> doing is playing a pure 440Hz sawtooth wave, and the soun

Re: [Alsa-user] dirty spectra

2007-10-12 Thread Jamie Lokier
Gene Heskett wrote: > The fall time of that computer generated sawtooth is probably 100x the > fundamental frequency of the sawtooth. I suspect what your ears are hearing > is aliasing because some portions of that exceed the sampling frequency, > which would be non-harmonically related, and tr

Re: [Alsa-user] dirty spectra

2007-10-11 Thread Gene Heskett
On Thursday 11 October 2007, Jonatan Liljedahl wrote: >Jonatan Liljedahl wrote: >> I'm having problems with distorted sound with ALSA. It's not clipping >> distortion but more like a dirty spectra. >> The test I am doing is playing a pure 440Hz sawtooth wave, and the sound >> is very unclean, there

Re: [Alsa-user] dirty spectra (case resolved)

2007-10-11 Thread Jonatan Liljedahl
Jonathan Leonard wrote: > On Oct 11, 2007, at 2:45 PM, Jonatan Liljedahl wrote: ...snip... >> But, this is interesting, when recording a pure sawtooth from my >> analogue modular into my soundcard (through a mixing desk) there was >> some ringing too, but it didn't sound at all as dirty as the prev

Re: [Alsa-user] dirty spectra

2007-10-11 Thread Jonathan Leonard
On Oct 11, 2007, at 2:45 PM, Jonatan Liljedahl wrote: > Jonatan Liljedahl wrote: >> I'm having problems with distorted sound with ALSA. It's not clipping >> distortion but more like a dirty spectra. >> The test I am doing is playing a pure 440Hz sawtooth wave, and the >> sound >> is very unclea

Re: [Alsa-user] dirty spectra

2007-10-11 Thread Jonatan Liljedahl
Jonatan Liljedahl wrote: > I'm having problems with distorted sound with ALSA. It's not clipping > distortion but more like a dirty spectra. > The test I am doing is playing a pure 440Hz sawtooth wave, and the sound > is very unclean, there's inharmonic partitials that shouldn't be there, > actuall

[Alsa-user] dirty spectra

2007-10-11 Thread Jonatan Liljedahl
I'm having problems with distorted sound with ALSA. It's not clipping distortion but more like a dirty spectra. The test I am doing is playing a pure 440Hz sawtooth wave, and the sound is very unclean, there's inharmonic partitials that shouldn't be there, actually below the fundamental frequency I