Audacity Forum

Vielen Dank,
es hat funktioniert
Wolfgang

Many thanks,
it worked
Wolfgang

Hello,

under Windows 10 there seems to be no StereoMix . Is there an equivalent.
I want to save the sound of a mediafile played with Videolan. Drivers are Realtek High Definition Audio.
Currently this is only possible via a microphone.

Wolfgang

Hello, I have uploaded my final raw PCM Data test file. A further refinement of the sound data extraction I think is not possible. If a High Pass Filter of 3 Hz (three Hertz) is applied, the clicks disappear and the graph in Audacity gets more symmetric. I think the quality for a optical sound track...

Hello Steve, many thanks for the provision of the "debugged" file test-hp50.wav . I think, the "clicks" can (and must) be removed during raw data generation, I have to investigate the real reason, but I think that can be found and eliminated. It must be done, because manual removal is too bothersome...

Hello Steve, the clicks are most likely the positions where the sample strips are appended to the output file. As I have to scan the movie in strips with a length of about 17.145 cm ( 9 * 0.75 inch [frame height] ) this red line seems to appear at strip end (or beginning of following strip). I have ...

Just a note that variable area sound track in the illustration has significant distortion. I thought it looked funny. The Real Thing -- for audio anyway -- doesn't ever go to all black emulsion. http://en.wikipedia.org/wiki/Sound-on-film Koz Hello Koz, it is right, the soundtrack has distortions (s...

Hello Steve,

thank you again.
I think you gave me enough input to do further investigation and testing.

Regards
Wolfgang

Correct, this is 1895 columns (image width in pixels) or roughly 0,045 seconds Zero width of a channel is silence, full with of a channel is very loud. To the previous question. In a movie projector this is converted to a voltage or current (I am not quite sure) by a light sensor and than fed into a...

Hello Steve, this is a snippet of a 35 mm Movie Film sound track. Left channel at top, right channel at bottom. Left side time = 0 sec, right side time + x sec. Soundtrack.jpg What I do, I measure the width of each track at each column of the bitmap resulting from the scanned image and use that valu...

Hello Steve, you are right, this is not the same TEST.wav file as originally posted. But it has been done with the same algorithm. Therefore it shows the same behavior. The first posted file should have also no values above 127. I unintentionally have overwritten the first file. So I should change t...