Re: [nfc-l] missing first few milliseconds of spectrograms made in Raven

2015-01-22 Thread Bill Evans
there was no such delay apparent. Bill From: Bill Evans Sent: Thursday, January 22, 2015 7:40 AM To: Night Flight Call List Subject: [nfc-l] missing first few milliseconds of spectrograms made in Raven When I open a short night flight call wav file in Raven, the waveform window begins at 0 sec

Re: [nfc-l] missing first few milliseconds of spectrograms made in Raven

2015-01-22 Thread Laura C. Gooch
Bill, The Cornell folks could probably answer you more definitively, but I think this is not a bug, but rather a result the way spectrograms are generated. The spectrogram comes from sampling and analyzing successive chunks of the waveform, so until enough time has gone by to encompass the

RE: [nfc-l] missing first few milliseconds of spectrograms made in Raven

2015-01-22 Thread Dean L Hawthorne
-10098...@list.cornell.edu] On Behalf Of Bill Evans Sent: Thursday, January 22, 2015 7:40 AM To: NFC-L Subject: [nfc-l] missing first few milliseconds of spectrograms made in Raven When I open a short night flight call wav file in Raven, the waveform window begins at 0 sec but the accompanying

[nfc-l] missing first few milliseconds of spectrograms made in Raven

2015-01-22 Thread Bill Evans
When I open a short night flight call wav file in Raven, the waveform window begins at 0 sec but the accompanying spectrogram window doesn't begin at zero -- it begins after a few milliseconds. See attached example. It’s not something that one would note unless they are working with very short