G
Guest
Hi, this is a problem that's annoyed me for a long time, searched on it and
found nothing (guess I'm the only one that cares about this), finally I found
a hard answer. I have edited some WAVs for startup sounds, used them on
windows 98 with no problems but in XP they sometimes cut off at different
times. I had a vague idea that it had to be the size of the WAV that was the
issue and was right. Here,
http://www.experts-exchange.com/Operating_Systems/WinXP/Q_20845144.html ,
look at the first question and the second to last reply (ignore the middle,
people didn't understand his question at all). "Rather - the limitation seems
to be based more upon the *size* of the file, as opposed to the length. My
original WAV file was 38 seconds long, and about 7.4 MB in size. If I saved
it as a Compressed WAV file, it was still the same 38 seconds long - but it
was now about 3.2 MB in size - and it played properly."
So, my question is could anyone elaborate on this issue? Is there some sort
of table so I could know when a sound might get cut off? Well now I got
into it more than I thought I would, I guess I'll make my own rough table
(these are all 1411kbps, 16bit, 2channel, 44kHz PCM wav sounds, these don't
vary in density):
length size cuts off at
1:35 16.1mb :46
1:30 15.2 :35
1:25 14.3 :24
1:19 13.4 :13
1:15 12.6 :05
1:14 12.4 :02
1:13 12.3 :00 - no sound detectable to my ear
1:12 12.1 :47
1:09 11.7 :43
:50 8.54 :04
:46 7.75 :43
:42 7.06 :34
:40 6.74 :28
:33 5.56 :19
:28 4.85 :08
:27 4.62 :06
:25 4.22 :02
:23 3.89 :not cut off
:18 3.02 :not cut off
:13 2.22 :not cut off
Good thing my computer is fast, that was a lot of restarts. It looks like
when you shorten the sound, it cuts off earlier, then when you get to a
certain point when the size of the sound is small enough, it plays more or
all of it. I guess these are specific break points, maybe when it fills a
buffer, but even that doesn't explain it since it's not a discrete graph. It
would be shaped like the bottom graph here:
http://ece-www.colorado.edu/~ecen2250/lab03/wavforms.gif, size of file on the
x axis, length played at startup on the y axis. Well I just don't understand
why it does that. However, I added 9 seconds of quiet to my current sound
and now it plays it all
found nothing (guess I'm the only one that cares about this), finally I found
a hard answer. I have edited some WAVs for startup sounds, used them on
windows 98 with no problems but in XP they sometimes cut off at different
times. I had a vague idea that it had to be the size of the WAV that was the
issue and was right. Here,
http://www.experts-exchange.com/Operating_Systems/WinXP/Q_20845144.html ,
look at the first question and the second to last reply (ignore the middle,
people didn't understand his question at all). "Rather - the limitation seems
to be based more upon the *size* of the file, as opposed to the length. My
original WAV file was 38 seconds long, and about 7.4 MB in size. If I saved
it as a Compressed WAV file, it was still the same 38 seconds long - but it
was now about 3.2 MB in size - and it played properly."
So, my question is could anyone elaborate on this issue? Is there some sort
of table so I could know when a sound might get cut off? Well now I got
into it more than I thought I would, I guess I'll make my own rough table
(these are all 1411kbps, 16bit, 2channel, 44kHz PCM wav sounds, these don't
vary in density):
length size cuts off at
1:35 16.1mb :46
1:30 15.2 :35
1:25 14.3 :24
1:19 13.4 :13
1:15 12.6 :05
1:14 12.4 :02
1:13 12.3 :00 - no sound detectable to my ear
1:12 12.1 :47
1:09 11.7 :43
:50 8.54 :04
:46 7.75 :43
:42 7.06 :34
:40 6.74 :28
:33 5.56 :19
:28 4.85 :08
:27 4.62 :06
:25 4.22 :02
:23 3.89 :not cut off
:18 3.02 :not cut off
:13 2.22 :not cut off
Good thing my computer is fast, that was a lot of restarts. It looks like
when you shorten the sound, it cuts off earlier, then when you get to a
certain point when the size of the sound is small enough, it plays more or
all of it. I guess these are specific break points, maybe when it fills a
buffer, but even that doesn't explain it since it's not a discrete graph. It
would be shaped like the bottom graph here:
http://ece-www.colorado.edu/~ecen2250/lab03/wavforms.gif, size of file on the
x axis, length played at startup on the y axis. Well I just don't understand
why it does that. However, I added 9 seconds of quiet to my current sound
and now it plays it all