[sdiy] Waveform mixing - normalization?

Thomas Wilk thomasedwardwilk at gmail.com
Tue May 10 17:43:44 CEST 2016

One thought for a normalization module could consist of:

-- an AC coupling input in which any wave entered has its DC bias removed
so it is oscillating about zero
-- this would be followed by a gain stage with your choice of how to
increase/attenuate gain, and you could manually listen for proper volume;
this stage could have an indicator from a comparator that lights an LED
when the wave reaches an arbitrary voltage, say 5V
-- a buffered mixer section would then mix together all signals patched
into this module and output them


On Tue, May 10, 2016 at 4:55 AM Mattias Rickardsson <mr at analogue.org> wrote:

> On 10 May 2016 at 00:28,  <eidorian at aladan.net> wrote:
> >
> > Re: osc sync you raise a good point - mixing different types of waveforms
> > from unsynced oscillators would probably be subtly different to mixing
> those
> > same types from the one oscillator, due to detuning and beating.
> I wouldn't call the difference subtle, but perhaps it's a matter of taste!
> :-)
> > I interpreted the original poster's use of "normalising" to mean "making
> all
> > the waveforms sound like they're the same volume to a human" which is not
> > the formal definition of normalising, but which I thought was the intent
> of
> > the original comments.  Are you suggesting he means "keep the same total
> > volume when two or more waveforms are selected and mixed" (by attenuating
> > each waveform when mixing more than one?)
> Yep! Like Neil just chimed in.
> /mr
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