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Audio output monitor

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Submitted on: 12/21/2017 1:16:14 PM
By: David Patterson 
Level: Advanced
User Rating: Unrated
Compatibility: VB 6.0
Views: 2072
 
     The application displays the default final audio volume level, both overall and by channel. The sound is analysed and graphed as a frequency histogram, raw frequency (fft) distribution or oscilloscope plot.
I have used the excellent libraries from http://www.un4seen.com/
You will need the following libraries in the application folder:
bass.dll
basswasapi.dll
The code relies on a modified version of modspectrum.bas taken from the examples downloaded from the site.
The pc must have a loopback audio output device.
The compiled exe is stable and has been tested on my 64 bit windows 7 PC and my windows 8 laptop. My xp setup did not have an audio loopback device.
The bass dll's employ callback which is notoriously unstable under the vb6 IDE. So running the code in the vb6 IDE environment is unstable. I simply compiled the exe and tested that during development. Expect to have to do the same and save all active forms before attempting to run in the IDE.

David

 
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12/23/2017 3:05:05 AMQuake

in XP try this for Visual. I do this for my XP machines for my Graph I use in my Media player. Right click Sound icon - Open Volume control's - Options to Properties - Select Recording(Audio Input) - Select Stereo Mix - Make a Check into Stereo Mix - Lower Volume to 1/4 in Stereo Mix - Exit

Quake
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