Using Line-In on Sound Card for Measurement/Analysis

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SUMMARY

The discussion focuses on using the Line-In feature of a computer's sound card for measurement and analysis with the software XOSCOPE. Participants confirm that a standard voltage for Line-In on sound cards is typically around 1.737V peak, with a common safe limit of 2V peak-to-peak. Users report that it is generally safe to connect devices to the Line-In without damaging the sound card, as the input usually includes protective circuitry like transformers.

PREREQUISITES
  • Understanding of sound card specifications, particularly Line-In voltage levels
  • Familiarity with measurement and analysis software, specifically XOSCOPE
  • Basic knowledge of audio signal characteristics, including peak and RMS values
  • Awareness of audio input protection mechanisms, such as transformers
NEXT STEPS
  • Research the specifications and limitations of various sound cards regarding Line-In voltage
  • Explore advanced features of XOSCOPE for enhanced measurement capabilities
  • Learn about audio signal processing techniques to optimize measurements
  • Investigate common pitfalls and best practices for connecting external devices to sound card inputs
USEFUL FOR

This discussion is beneficial for audio engineers, hobbyists interested in sound analysis, and anyone looking to utilize sound cards for measurement purposes.

Shawnzyoo
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I have been reading up using the Line-in on my computers sound card and the pogram XOSCOPE to be able to do some various measurement/analyzing
But before I attempt to actually plug anything together i want to make sure I don't wreck my soundcard
I have found that some soundcards have the line-in listed at a voltage of 1.737 (peak) is this the standard for soundcards?
has anyone here have any experiences with this setup
successes/failures?
Thanks for any advice!
 
Engineering news on Phys.org
Usually 2V peak-to-peak isn't a problem. It's almost assuredly going through an input transformer first anyway. It's hard to wreck it.

- Warren
 

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