On Fri, Dec 24, 2010 at 06:51:18PM +0100, Jörn Nettingsmeier wrote:
> On 12/24/2010 06:07 PM, Q wrote:
> > Out of interest, how high can intersample peaks get above the highest
In theory it could be any value. In practice it's limited by the lenght
of the antialiasing filter. You get the maximum output for a series of
samples at max amplitude (+ or - 1) and matching the sign of the IR of
the filter at half a sample delay.
For example, if '+' means a sample of +1, and '-' a -1, then the
sequence of 20 samples:
will produce of peak of more than 8 dB above FS.
It's very unlikely to get such a sequence with natural sounds,
but quite possible with synthetic signals or when using agressive
There are three of them, and Alleline.
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