Re: [Sndobj-devel] Connecting double Interp

[Bosko&Toma M. <bos...@gm...>]

Hi!

Without second envelope, the amplitude looks something like:
|
| |
| | |
| | | |
| | | | |

Comb filter repeats beep sound and amp is decreasing.
Now, with second envelope I need something like this:
    |
  | | |
| | | | |

But with my code envelope is:
| | |
| | | |
| | | | |

If I increase the parameter of second envelope from 1 to cca10 so it goes
from 0 to 10(not 0 to 1), the envelope is same like in 3rd example, only the
amplitude is higher. How can I make envelope to be like in example 2?
I know that this is some stupid problem but I can't figure it out...
Thanks.
B

On 9/26/07, Victor Lazzarini <Vic...@nu...> wrote:
>
> what is happening is that your 2nd envelope is not having
> much effect. The comb filter will repeat the first short beep
> every 1/2 sec, decreasing its volume by half each repeat. The
> envelope is going from 0 to 1 in 3 sec, increasing as the
> beeps decrease. If you want amplification then it has to
> go above 1, but the sound will decay because the comb
> filter makes it decay. I am not sure what you want, but
> do you understand what is happening?
>
> Victor
>
> At 19:46 25/09/2007, Bosko&Toma Milakovic wrote:
> >Hi!
> >
> >I have this code:
> >
> >import sndobj
> >import time
> >
> >tab = sndobj.HarmTable()
> >osc = sndobj.Oscili(tab, 400, 1)
> >line1 = sndobj.Interp(5000, 0, 0.1)
> >ring1 = sndobj.Ring(osc, line1)
> >dly = sndobj.Comb (0.5, 0.5, ring1)
> >line2 = sndobj.Interp(0, 1, 3)
> >ring2 = sndobj.Ring(dly, line2)
> >
> >outp = sndobj.SndRTIO(1)
> >outp.SetOutput(1, ring2)
> >
> >t = sndobj.SndThread()
> >t.AddObj(osc)
> >t.AddObj(line1)
> >t.AddObj (ring1)
> >t.AddObj(dly)
> >t.AddObj(line2)
> >t.AddObj(ring2)
> >t.AddObj(outp, sndobj.SNDIO_OUT)
> >t.ProcOn()
> >time.sleep(5)
> >t.ProcOff()
> >
> >When I multiply osc and line1, I get short sound. That part is ok. Now,
> >the problem is in the second Interp() - line2. When it's multiplied  with
> >dly(Comb) I don't get desired result, which is that Comb's output
> dynamics
> >goes from 0 to 1 in 3sec. The sound has just lower volume, but the
> >envelope stays the same. What am I doing wrong?
> >Thanks.
> >
> >Bosko
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>
> Victor Lazzarini
> Music Technology Laboratory
> Music Department
> National University of Ireland, Maynooth
>
>