Hi Oeyvind,

Have you considered generating a pulse to get an impulse response and
then just using convolution?

steven

On Tue, Jun 3, 2008 at 2:24 AM, Oeyvind Brandtsegg <obrandts@gmail.com> wrote:
> Hi
>
> I'm trying to write an instrument that will analyze the frequency
> response of my audio system (the signal path from Csound output, via
> speakers, microphone, and back into Csound).
>
> I want to use the result of the analysis to shape an audio signal (all
> inside Csound) so that it will sound (as close as possible) like it
> has been played through the speakers and recorded back into Csound.
>
> I figured I could use the pvs opcodes, with pvsftw writing a table
> with amplitudes for all frequency bands in the analyzed signal (audio
> system response simulated with an arbitrary filter in the attached
> csd), then use pvsmaska to shape the frequency response of another
> signal.
>
> This works in terms of frequency response, but the overall amplitude
> is very low for the "shaped" signal (aout in instr 2 of the attached
> csd).
> I wonder if there are some formula for gain makeup in this case ?
> It seems to me in theory this should just work "out of the box), with
> no need for makeup gain, or am I way off in supposing it should work ?
>
> best
> Oeyvind
>
> Send bugs reports to this list.
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"