Hello all,
We have build a set-up using the sound card audio input, where we want
to do some processing on the incoming audio signal.
It is important that we can capture the data over a long period, e.g.
24 hours, and without missing any samples.
Did anybody of you ever succeed to acquire continuous data from the
sound card within Vee (e.g. mmsystem.dll API)?
I have found FreeView dll but it seems it can only read blocks of
samples, resulting in the loss of data between 2 blocks.
Any help or examples are greatly appreciated.
Best regards,
Jo De Loor
Test engineer
Newtec Cy
Laarstraat 5
B-9100 Sint Niklaas
Tel: +32 3 780 65 00
Fax: +32 3 780 65 49
http://www.newtec.be
E-mail: jdl@newtec.be
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We have build a set-up using the sound card audio input, where we want
to do some processing on the incoming audio signal.
It is important that we can capture the data over a long period, e.g.
24 hours, and without missing any samples.
Did anybody of you ever succeed to acquire continuous data from the
sound card within Vee (e.g. mmsystem.dll API)?
I have found FreeView dll but it seems it can only read blocks of
samples, resulting in the loss of data between 2 blocks.
Any help or examples are greatly appreciated.
Best regards,
Jo De Loor
Test engineer
Newtec Cy
Laarstraat 5
B-9100 Sint Niklaas
Tel: +32 3 780 65 00
Fax: +32 3 780 65 49
http://www.newtec.be
E-mail: jdl@newtec.be
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> 24 hours, and without missing any samples.
I would suggest either using a Real Time OS, or a data acquisition card
that can buffer Windows hiccups. Also realize that the sound card input
normally is not linear, has poor frequency response, and is uncalibrated.
If the data is so important that you can't miss a sample you should
dedicate some hardware to it.
Les Hammer
Partner
Complete Test
720 SW 14th St.
Loveland, CO. 80537
Les.Hammer@CompleteTest.com
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