[Ardour-Users] Removing hum from track

Adriano Michael Petrosillo ampetrosillo at gmail.com
Sat Apr 29 13:07:01 PDT 2017

On Sat, 29 Apr 2017 18:28:33 +0200, Ralf Mardorf wrote:

> Hi,
> this unlikely works very good, if at all.
> Assuming the hum on different tracks would be completely in sync, so
> that inverting the phase would cancel out the hum, it still requires
> that the hum and inverted hum have the same energy. In reality
> the hum of several tracks neither is in sync, nor do they have the same
> energy and apart from this the hum could be some kind of modulated,
> resp. interacting with the wanted signal.
> The situation of recoded individual recorded and mixed tracks, is
> completely different to the situation of a balanced cable.
> Regards,
> Ralf

Apart from that, it isn't always easy to simply flip the phase.
When tracking a drumkit, for example, you'll generally want to keep
tracks coherent phase-wise (even though the simple fact that mics are
spaced apart will ensure that sound coming from a particular piece
of the drumkit will always be somewhat misaligned in different tracks due
to the time difference).


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