[TriLUG] Sound Processing

[Jim Ray]

No way, dude:
http://www.neuse.net/products/audio/Altec1569ASchematic.jpg

Mine is circa 1940 and used to power the Voice of the Theatre speakers back
in the day.  I did some serious modification to it (polypropylene caps
rock).

Regards,
 
Jim
 
Jim Ray, President
Neuse River Networks
tel: 919-838-1672 cell: 919-606-1772
http://www.Neuse.Net
 
Connecting You to the World since 1997
 

> -----Original Message-----
> From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On
Behalf Of Roy
> Vestal
> Sent: Tuesday, July 10, 2007 7:55 PM
> To: Triangle Linux Users Group discussion list
> Subject: Re: [TriLUG] Sound Processing
> 
> Heh...My amp's older than your amp (1958 Danelectro)
> 
> BTW, Depending on the software, you can also use a notch filter as a
> high pass filter...You can setup up audacity to do this.
> 
> One of the cool things about Audacity, is you can capture the specific
> frequency and then use it as a filter. Just be careful not to capture
> the wrong one.
> 
> Oh, you could also try sending the 180 phase frequency through the wav
> file by piping it through freqtweak. I haven't used it this way for a
> final product yet, but I've been goofing with it.
> 
> HTH
> 
> Jim Ray wrote:
> > Wouldn't a single pole high pass at 800 Hz slam 60 Hz into the noise
> > floor?
> >
> > I'd use something like Cool Edit myself. It has been 15 years since I
> > last designed an analog filter in the field.  Everything has gone
> > digital.
> >
> > Not my vacuum tube guitar amp, though ;-)
> >
> > Regards,
> >
> > Jim
> >
> > Jim Ray, President
> > Neuse River Networks
> > tel: 919-838-1672 cell: 919-606-1772
> > http://www.Neuse.Net
> >
> > Connecting You to the World since 1997
> >
> > -----Original Message-----
> > From: trilug-bounces at trilug.org <trilug-bounces at trilug.org>
> > To: Triangle Linux Users Group discussion list <trilug at trilug.org>
> > Sent: Tue Jul 10 13:51:55 2007
> > Subject: Re: [TriLUG] Sound Processing
> >
> > On Tue, 10 Jul 2007, Jim Ray wrote:
> >
> >> Look for a *high* pass filter, not notch.
> >
> > The analogue notch filters are really sharp. You can't
> > acheive anything nearly as sharp with high/low pass. If
> > you've got a single frequency, then notch is the way to go.
> > I don't know how sharp the FFT notch filters are.
> >
> > Joe
> >
> 
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