How to make an oscilloscope from a sound card under Linux?

Question

linux

Recommend programs for linux to generate and analyze signals using a sound card.

Answer 1

To quote from the Debian repository:
"Xoscope is a software oscilloscope that uses the sound
card input or EsounD and/or ProbeScope/osziFOX and will soon
support Bitscope hardware. Includes 8 waveform display,
time duration switch, math functions, memory,
magnitude measurements , and loading/saving to a file."
And then there's Audacity.

Answer 2

.. And a sound card, probably onboard?
but in general the quality of both reception and transmission there will be very poor compared to a normal oscilloscope, so the idea, ahem, is not very