Re: Flying cows (was Re: [f-cpu] Something new to play with :))

[Michael Riepe <michael@stud.uni-hannover.de>]

On Thu, Sep 27, 2001 at 05:55:14AM +0200, Yann Guidon wrote:
[...]
> > > did i say i'm an audio freak ?
> > So do you have a TUBE amp too!
> no, a bunch of LM741 connected in "impedance adapter" mode.
> well, that's the usual stuff i do : one 8-pin IC per channel,
> one pair of batteries and some capas for decoupling. However
> the analog stage of the "Flying calf" (that i'm turning into
> a real flying elephant :-D) has Motorola 33078 AOPs, and i am
> trying to find the correct resistors because the current setting
> eats up almost 30db. i need _very_ sensitive inputs :-)

Shouldn't you use a less ancient opamp, then?  I won't suggest a 5534
(it draws too much power), but what about a TL071?

[...]
> > > My MZR-30 has decoupling problems,
> > > the internal A/D is not protected from the electric motor power noise.
> > *ouch*
> right. You can't even filter it out because the frequency changes with time
> and the spectrum is rather wide... What the point of going digital when the
> analog side is badly designed ? OTOH the "line in" is correctly decoupled but
> there is still the problem of the sensitivity tuning during the recording.
> An external converter is the best solution.

Yep.

> > > did i say i'm an audio freak ?
> > No, but I get the idea... ;)
> hmmm and what if i say that i have a Aria Pro II bass guitar that i equiped
> with a pair of _big_ Bartolini pickups ($$$) and a mini internal amplifier
> (2*9V batt. + 2*LM741 + 1 stereo jack + 1 dual switch) ? Given the fretless
> handle and the flatwound strings, can you imagine the sound ? :-))))))))

*ba-boom*

> And now do you understand why i could not resist hacking into the flying cow ?

Of course.

[...]
> PS : i'll take pictures when the slaughter is over :-P

*hehehehehe*

-- 
 Michael "Tired" Riepe <Michael.Riepe@stud.uni-hannover.de>
 "All I wanna do is have a little fun before I die"
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