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- Audio is too fast
January 19, 2010, 4:19 pm
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I put a computer together from parts, and it has a problem I have
never encountered before. The audio (e.g. a singer's voice) is a
little fast similar to what would happen from playing a tape at too
fast a speed. Is there an adjustment somewhere for this? I sure
can't find it. Maybe the sound card is bad or not set up right?
I am running XP PRO SP2.
Re: Audio is too fast
When music is recorded, somewhere (like the header of the file) is
an indication of the sampling rate used.
On a CD, the sampling frequency might involve numbers like 22.05KHz
or 44.1KHz. Whereas, another popular rate on a sound chip would be
It is important, for the player application and the chip doing the
sound conversion, to operate at the same speed as the samples being
used. For example, imagine what would happen if 44.1KHz samples
were played at a 48KHz rate. Both the pitch of the singer's voice
would be higher, and the duration of the song playback would be
shorter than normal. (Time the duration of the song, and see if
it lasts shorter than normal, by the ratio of 44.1 to 48.)
It is up to the software involved, to use the proper rate for the
music being played. As Kony has suggested, it could be a player problem.
Or it could even be a driver problem (driver tells lies about
sampling rates used). If the sound driver has a control panel, with
its own "test sound", you might try that and see if the pitch is
correct or not. The sound chip also has to use something as a timing
reference, and if that timing reference is wrong, that could account
for a pitch shift.
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