On Monday 16 August 2004 19:09, Stanley Jaddoe wrote:
> On Monday 16 August 2004 18:23, Jens M Andreasen wrote:
> > Now please tell us, what is this synth of yours that you have
> > disassembled? Is this circuit part of the output-stage or is it part of
> > the individual oscillators? Inquiring min
On Monday 16 August 2004 18:23, Jens M Andreasen wrote:
> Now please tell us, what is this synth of yours that you have
> disassembled? Is this circuit part of the output-stage or is it part of
> the individual oscillators? Inquiring minds wants to know!
It's the TR-909 drum machine.
For the Bass
On mån, 2004-08-16 at 16:49, Stanley Jaddoe wrote:
> The 12k resistor is just an example, it would be nice if it would be treated
> as a variable.
>
> How can I incorporate the 1N4148 diode characteristics in the final equation?
>
One interresting thing to consider is that the diode pair is mi
On Mon, Aug 16, 2004 at 04:49:47PM +0200, Stanley Jaddoe wrote:
> I did some SPICE emulation (Alfons: I know, I'm not a (real) engineer) and I
> never saw a tangentfunction-like output...
The formula I posted does not contain a tangent, but an *hyperbolic* tangent.
> Assuming one input and on
On Mon, Aug 16, 2004 at 04:49:47PM +0200, Stanley Jaddoe wrote:
> The 12k resistor is just an example, it would be nice if it would be treated
> as a variable.
The actual value doesn't matter, you'll get almost the same transfer shape
for any reasonable resistor value. Just make the input leve
On Monday 16 August 2004 12:45, Erik de Castro Lopo wrote:
> Both of those would probably sound better than what I posted,
> but the original circuit had a 12k source impedance. As soon
> as the the input overcomes the forward voltage drop of the
> diodes the impedance of the diodes drops to the lo
On Mon, Aug 16, 2004 at 02:43:14PM +0200, Jens M Andreasen wrote:
> Wouldn't the current be limited by the 12k resistor, so that the
> impedance of the diode won't drop as fast as you suggest?
OK, here are some real values, found with a hand calculator (real
engineers don't use Spice :-) View wi
On mån, 2004-08-16 at 12:45, Erik de Castro Lopo wrote:
> On Mon, 16 Aug 2004 12:13:51 +0200
> Alfons Adriaensen <[EMAIL PROTECTED]> wrote:
>
> > This is a bit too simple. The diode circuit does not perform hard
> > clipping when driven at moderate levels.
> >
> > Something like
> >
> > out =
On Mon, Aug 16, 2004 at 08:45:49PM +1000, Erik de Castro Lopo wrote:
> On Mon, 16 Aug 2004 12:13:51 +0200
> Alfons Adriaensen <[EMAIL PROTECTED]> wrote:
>
> > This is a bit too simple. The diode circuit does not perform hard
> > clipping when driven at moderate levels.
> >
> > Something like
> >
On Mon, 16 Aug 2004 12:13:51 +0200
Alfons Adriaensen <[EMAIL PROTECTED]> wrote:
> This is a bit too simple. The diode circuit does not perform hard
> clipping when driven at moderate levels.
>
> Something like
>
> out = tanh (in) (or tanhf() if available)
>
> or
>
> out = in / sqrt
On Mon, Aug 16, 2004 at 07:49:36PM +1000, Erik de Castro Lopo wrote:
> Its actually rather simple (first year EE):
>
> static inline double
> diode_clip (double input, double clip_level /* should be positive */)
> { if (input > clip_level)
> return clip_level ;
>
On Mon, 16 Aug 2004 10:54:04 +0200
Stanley Jaddoe <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I'm trying to convert an existing analog (hardware) synth to an open source
> softsynth.
> One of the components of the analog synth is a diode wave shaper. The
> schematic is included (diode.jpg). The Inputs
From: Jens M Andreasen <[EMAIL PROTECTED]>
Reply-To: "The Linux Audio Developers' Mailing
List"<[EMAIL PROTECTED]>
To: "The Linux Audio Developers' Mailing
List"<[EMAIL PROTECTED]>
Subject: Re: [linux-audio-dev] Diode wave shaper (LADSPA plugin
On mån, 2004-08-16 at 10:54, Stanley Jaddoe wrote:
> Hi,
>
> I'm trying to convert an existing analog (hardware) synth to an open source
> softsynth.
> One of the components of the analog synth is a diode wave shaper. The
> schematic is included (diode.jpg). The Inputs 2, 3, ... n and its resist
Hi,
I'm trying to convert an existing analog (hardware) synth to an open source
softsynth.
One of the components of the analog synth is a diode wave shaper. The
schematic is included (diode.jpg). The Inputs 2, 3, ... n and its resistors
are optional.
I'd like to know if there's a LADSPA plugin
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