harrydeng
First Lieutenant  Posts: 4 Registered: 11/6/2008 Status: Offline
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 posted on 11/17/2008 at 07:11 |
what's latency of sound? who knows, pls advise. thanks ahead of time
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Guitar101
Moderator   Posts: 481 Registered: 12/22/2003 Status: Offline |
posted on 11/18/2008 at 14:55, Reply 1 |
Latency refers to a short period of delay (usually measured in
milliseconds) required for the conversion between analog and digital
representations of the sound data. Devices such as computers can only
process digital data. Thus, the analog data it receives on microphone or
line-in inputs must be converted to digital data. After processing of data,
the processed data must be converted back to an analog signal before it can
be output to speakers and played back.
This conversion between analog and digital takes a short amount of time,
which is known as latency. Although this process consumes a very small
interval, it can have a cumulative effect if the data is handed off by
several layers of software.
One example of latency is a musical keyboard connected to a computer. When
the user hits a key, an audio signal, which is analog, is transferred along
the connecting wire in the form of electrical current. The computer would
then convert the signal to a digital format and process it according to any
settings input by the user. After the processing is complete, the processed
digital signal is converted to an analog sound wave (represented by current
in the wire), which is then sent to the speaker.
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