I just wanted to follow up on Victor's reply with a technical
explanation. As far as I remember, if you use in with a stereo orch,
what happens is that you read from the audio stream as if it was mono
though it is interleaved stereo.  So you'd be getting sample 1 from
channel 1, sample 1 from channel 2, sample 2 from channel 1, etc.

steven


On Jan 14, 2008 9:38 AM, victor <Victor.Lazzarini@nuim.ie> wrote:
> You are using in (mono) in a stereo instrument (use ins)
>
>
> ----- Original Message -----
> From: "Rory Walsh" <rorywalsh@ear.ie>
> To: "Developer discussions" <csound-devel@lists.sourceforge.net>
> Sent: Monday, January 14, 2008 5:17 PM
> Subject: Re: [Cs-dev] aliasing on input
>
>
> > Are you sure it is aliasing? Try using 'a1 inch 1' or whatever channel
> > you are taking the input from. I and others on the list have found that
> > using the in opcode with a mono mic results in a very noisey input
> > signal. Hopefully this is the problem and can be fixed easily, otherwise
> > I'm afraid I can't really help you.
> >
> > Rory.
> >
> >
> > Jonatan Liljedahl wrote:
> >> This simple orchestra gives me very much aliasing distortion, i use it
> >> as this:
> >>
> >> csound -+rtaudio=alsa -o dac:plughw:1 -i adc:plughw:1 myfile
> >>
> >> the aliasing seems connected to the control rate, if I set kr to 441 it
> >> gets much worse...
> >>
> >> the orchestra:
> >>
> >> sr = 44100
> >> kr = 4410
> >> ksmps = 10
> >> nchnls = 2
> >>
> >> 0dbfs = 1
> >>
> >> instr 1
> >>       a1 in
> >>       outs a1, a1
> >> endin
> >>
> >
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