Hi Gerry & Ed--
I also was able to get normal playback (without
the waivering lower mid tone that seems to stem
from the bees?) by working from Dana's original
.wav file.
It could be that the cause was double M-S
encoding as Dana speculated. I've also heard
digital noise reduction plugs like Sound Soap
create a similar effect. In any case, I'm
doubtful that the waivering/companded effect was
the result entirely of the mp3 encoding, which, I
believe was at 128 kbs.
I'm okay with people using 192-320 kbs MP3's--
even better if there's a uncompressed.wav or .aif
download option too.
It would be an asset if we had a couple of GB's
of host space to upload snippets to-- especially
because people use our archives and a great
majority of our links die. I hesitate to upload
meaningless fragments to Prelinger and similar
archives. We might be able to make 2 GB last a
long time with a policy of deleting files over
4mb? every 12 months. We could also selectively
retain >4mb files that get sustained use. Rob D.
=3D =3D =3D =3D
At 4:19 AM +0000 6/26/06, 1GDW wrote:
>I have encoded the DawnChorusMS.wav using Lame and I believe this
>MP3 is much better than the MP3 link. I would post it to the file
>section for comparison but the files in there are taking 97% 0f the
>space.=A0
>
>Gerald White Muscatine, IA
>
>--- In Ed Anson <>
>wrote:
>>
>> Dana,
>>
>> The WAV file sounds much better than the mp3. It's a pretty good
>> recording. This reminds me of why I almost never use mp3 encoding.
>>
>> I still don't hear much of the hiss you are worried about. But my
>son
>> does. I think that's due to the relative ages of our ears. I took
>a
>> quick look with a spectral analyzer and found an unusual amount of
>> energy above 15 kHz. Combining that information with the one
>annoying
>> sound I heard (the constant drone of insects) makes me think that
>there
>> were a lot of insects in the area and they are making a lot of
>high
>> frequency noise. That makes me think that gentle use of a low pass
>> filter might improve things a bit.
>>
>> Now I can also hear the rumble. Although it's not as annoying (to
>me)
>> as the drone of the insects, a high pass filter does reduce it a
>bit
>> and seems to clarify the rest of the sounds.
>>
>> Unfortunately, I don't know of anything that will remove the
>constant
>> insect noise without harming other sounds. So let's just be
>purists and
>> say that it's a part of what was there in Nature. OTOH I would be
>> inclined to edit out the motorcycle noise at the end.
>>
>> Ed
>>
>>
>>
>>
>> On Jun 25, 2006, at 6:19 AM, Dana Blackmer wrote:
>>
>> > Rob,
>> >
>> > Here are two links - the first is to an uncompressed portion of
>the
>> > file
>> > before MS to XY decoding (it's a 70 second wav file, so will
>take a
>> > little
>> > while to load). The second is the same file with MS decoding
>and
>> > converted
>> > to mp3. I've included the mp3 version here because after I
>tried to
>> > retrace my steps from my original post, I think that there is a
>50/50
>> > chance that I mistakenly used an already decoded version of the
>file
>> > and
>> > decoded it a second time before saving it as an mp3.
>> >
>> > Thanks for the help.
>> >
>> > Dana
>> >
>> > http://www.danablackmer.com/AudioFiles/DawnChorusMS.wav
>> >
>> > http://www.danablackmer.com/AudioFiles/DawnChorusXY.mp3
>> >
>> >
>> >
>> >
>> > At 09:00 PM 6/24/2006 -0500, you wrote:
>> >
>> >> At 2:23 PM +0000 6/24/06, Dana Blackmer wrote:
>> >>> Can this sound be filtered out or diminished without
>> >>> getting the "blurby" sounds I sometimes get with a filter?
>> >>
>> >> Hi Dana--
>> >> It seems like you should have a good recording there, but there
>is
>> >> something peculiar going on isn't there? Any chance you can
>post a
>> >> portion of the file uncompressed-- a straight copy of the field
> > >> original, no m-s decoding? Best, Rob D.
>
>
|