[PD] making puredata headphone-safe

[Martin Peach]

On 2011-08-29 20:04, Mathieu Bouchard wrote:
> On Mon, 29 Aug 2011, Ed Kelly wrote:
>
>> The problem is that some objects can generate unstable errors that are
>> orders of magnitude greater than normal audio signals. Then there is a
>> signal that maybe goes between +/- 100000 rather than +/- 1, and the
>> volume control makes little difference.
>
> It's much, much worse than that. If you have anything that multiplies
> the amplitude of the signal by 1.0001 at every sample, the amplitude
> gets 82 times louder every 44100 samples, and it will go beyond 8e+37
> and rounded to infinity, where no multiplication by a fraction can
> possibly fix it.
>
> that's quite a few billion billion billion.
>
> It's easy to get there. Put the wrong number in [*~] in a delay-loop, or
> put the wrong number in [rpole~], ...
>

Yeah, you can actually blow the whole planet to pieces by accidentally 
multiplying your output by a trillion.

Martin