Anybody played with the LM1036?

[The Dark force of dance]

Y-ellow y'all.

At 02:37 PM 4/24/98 -0400, List, Christopher wrote:
>It's a dual voltage controlled tone, volume, pan control. Two audio
>inputs, two audio outputs, and 4 CV inputs; volume treble, bass and pan
>- each takes 0 to +5v. Unfortunately, the supply voltage is 0 to +15v,
>not -15/+15. The specs are nothing to write home about (definitely
>consumer grade), but hey, it's a nice simple chip for playing around
>with - and while I haven't looked them up in a distributor catalog,
>National sells 100 for $1.40 each, so I doubt they're very expensive for
>singles... 
>Looks like it'd be super-easy to make a nice final output stage with
>CV-pan...

I've used veritable g'a'zillions of 'em. They're damn hot IMHO. I don't know
where you get the quality issues from. They sound superb. I built my
ex-partner's entire live-mixer using them. Even the mono channels. The
balance just became a Pan control. Highly recommended if you need a quick,
cheap and reasonably high quality channel control. And of course you can use
cheap yucky pots because it's voltage controlled. If you're in a split
supply system just hand them from the positive supply with some by-pass
caps. The CV is 0 to +5 volts. They have an on-board reference or you can
ref them externally. Easy to drive from an A-D converter. You don't even
need a sample hold system. The CV inputs are high enough impedance that the
smoothing cap will hold the CV for an indeterminate, but very long time.

They are easy to get and very common. I don't know what problems Paul has
had but until recently, I've had no problems getting them. And that's only
because you can't get anything here anymore. Not because they are unavailable.

Note1: NSC also make several digitally controlled version of this chip. The
biggest has a 4 way input selector with mute. Plus 4 individual outputs.
Making it Ideal for multi bus systems. Though it's actually designed for 4
speaker car stereos. Also in NSC's family are digitally controlled EQ chips,
and a series of digitally controlled potentiometers. These have variable
tracking characteristics from liner to log or any curve you program into
them. All these devices use a simple 3 wire (MicroWire) interface and can be
cascaded to as many devices as you like. However the LM1036 (previously know
and the LM1035 and is definitely unavailable under that part number) is the
only analogue controlled audio device they make.

NOTE2: Philips and other manufacturers such as Seimens and SGS Thompson make
quite a range of CV controlled audio chips. SGS Thompson even make a 3 band
stereo EQ. (TDA7319) The Philips 'TEA6360' is their equivalent to the
LM1036. There are too many others to mention but look for them on the
relevant FAB's sites.

Hope this helps.

be absolutely Icebox.
 _ __        _                              
| "_ \      | |         batzman at all-electric.com / aek at all-electric.com
| |_)/  __ _| |_ ____           ALL ELECTRIC KITCHEN               
|  _ \ / _` | __|___ |  The new AEK CD, Elementary Urban sanity    
| |_) | (_| | |_  / /   is out now on Transmission Communications from
|_,__/ \__,_|\__|/ /    http://brisbane.dialix.com.au:80/~com11
                / ,__   and check out http://www.all-electric.com
Goodfortune    |_____|       Let your SANITY wear thin.