When his .wav is saved, the file, when played is extended twice the original length

Hello!

I have a problem with recording the sound to the .wav file.

Acquires it sound .vi normally and displays on the front panel in real time. But when I save the file and listen to it, everything is slowed down twice. So if I record 10s, then I have to listen to the file for 22 s.

Any idea where I fool you?

I have attached a .jpg of the .vi file, if you need the .vi work please let me know.

Nice day

Hello.
 
In addition to the instructions of cock red, there are two things you need to check:

1. card sampling rate 9234. A real is not the one ask you.
See manual page 15.
"When you use the master 13,1072 MHz internal time base, the result is the data rates of.
function of 51.2 kech. / s, 25.6 kech. / s, 17.067 kS/s and so on until 1.652 kech. / s,.
the value of n."

So, if you ask 22050 like sampling in DAQmx sample clock frequency, the actual speed will be 25600. Given that the wav file guess 22050 (see point 2), you will have an 11.7 s to a real signal for 10 seconds.

2. in 'wav open file.vi', you must meet the sound format that wil be registered as heading in the wav file to retrieve more.
Default value is 22050, 2 16-bit channels. This means that your recording 50000-asked was really a 51200
and recorded as it was 22050.
 
Wav format must be exact get the signal as it is. (sampling rate real, 1-channel, 16-bit in your case).

In this forum, there are a lot of info on wav files.
 
 
Best regards.
Aipio

Tags: NI Software

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