I have some .aup files and their associated (name)_data folders containing the data. I know these were recorded in either 16-bit sample format or 32-bit-float sample format, but I have forgotten which one. Is there a way to find this out from within Audacity? I know there is usually a sample format echoed to the left of the track display, but I think this is just indicating the setting of the current quality preference, and not necessarily the sample rate of the opened file.
Yes, that’s the “wish” value and has nothing to do with the original show. Audacity doesn’t “do” Clip INFO. Audacity converts anything incoming to it’s own internal format and then converts again on the way out. This is what makes it such a terrible MP3 editor.
In this case you can tell by opening the AUP file in Notepad. If the “sampleformat” of the sequence is “262159” it’s 32-bit float data, even if your “default sample format” quality preference is 16-bit and so the Track Control Panel says 16-bit (which is the resolution the data is being viewed at).
This means that if you process the 32-bit float data, dither noise isn’t added even with 16-bit quality preference, whereas if it really was 16-bit data, dither would be added.
If the sampleformat is “131073”, it’s 16-bit data.