#338 Spectrogram of very BIG file

[Giovanni Di Maria]

Hello.
I tried to create a single wav file by doing an "append" from 8 wav files. Each wav file has a duration of 4 hours (14400 seconds).

I ran the command (from WIndows 10):

• sox * .wav FINAL.WAV

The program created the FINAL.WAV file (6 Gbytes).

Then, from this file I created the Spectrogram with:

• sox FINAL.WAV -n spectrogram -x 10000

From the spectogram I see that the total duration is not 115200 seconds, but only about 35 kS. Why ?

Thank you.
Giovanni Di Maria

[Giovanni Di Maria]

I understand.
The problem is not in the creation of the spectrogram, but in the queuing of the WAV files. They are very long.
What is a possible solution?
Thank you.
Giovanni

[Mans Rullgard]

The WAV format doesn't support file sizes over 4 GB. You have to use some other format for large files.

If you just want to create the spectrogram, there is no need to save the concatenation at all. Instead, use a command like sox *.wav -n spectrogram ...