>> My standard technique is to make all audio cuts crossfades. It's
>> easy in a DAW. 15 ms is usually enough, 30 ms will be smooth. Try
>> it.
>
> Agree, and Audacity has a linear cross-fade function precisely for
> this. Zero crossing cuts will not remove a DC component across the
> join unless the preceding half wavelength is exactly matched and
> opposite to the following half wavelength.
It's not only the DC component, but point well taken, as lots of digital audio
includes a DC component. That means when there is no sound, the "zero" level is
slightly up or down from actual zero. "DC offset" is another term for this
artifact of A-D converters.
Even if there is no offset, a sine wave that stops dead has a whole string of
harmonics associated with that event. That is what perpetrators of the myth
neglect.
I'm not sure what you mean by "linear cross-fade," but IMHO the best cross-fade
for splicing is "equal-power," i.e. 3 dB down at the center point.
> This problem takes me all the way back to the origins of tape editing
> with editing blocks which had an angled cutting slot.
Exactly. A 45-degree splice on quarter-inch tape at 7.5 ips is 33 ms--perfect.
-Dan
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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