recordings of bird calls

Subject: recordings of bird calls
From: Graeme Chapman <>
Date: Thu, 12 Sep 2013 14:51:52 +1000
Hello Mark and Amanda,

In addition to regional variation , sex differences and variation between 
individuals already referred to, with some species (I'm not sure about Wongas) 
the same individual can vary the pitch of a call, usually related to the bird's 
state of anxiety.

However, the reason can also be electronic. If you are copying sound from CDs 
to your phone or iPod you will be likely copying from one format to another 
i.e. WAVE or WMA to MP3. If the settings for sample rate are not correctly 
entered, there can be a change in pitch.

I have two recordings of Wongas. The one on my website is lower in pitch than 
David Stewarts Wonga on the Morcombe app (played on my iPod) but my other 
recording is roughly the same pitch as Dave's.


Graeme Chapman

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