Help fixing corrupt .wav file

[barhrecords]

I am importing raw data from a corrupt wav file.

The file is Signed 32 bit PCM @ 48000.

I can get the import to work but the file plays back too fast. Like the SRC changed the playback speed?

Audacity 2.0.3
Windows 7 Pro SP1 64 bit

[kozikowski]

Doesn't the raw import give you the ability to select the sample rate? You picked the wrong one. Once it's on the timeline, you can use the drop-down to the left and change it there, too.

Koz

[kozikowski]

I'm going to write this down. You may be the only person who ever got Import Raw to do anything useful.

Koz

[barhrecords]

It took me a while to get import raw to do anything useful for sure

These files are from a multitrack digital recorder. Some of the files are fine and some corrupt. I suspect the corrupt files were not closed correctly.

All the files were recorded 48K 32bit float.

But to get the files to import at all, I had to choose the Signed 32 bit PCM codec in audacity NOT the 32 bit float codec. I thought that was weird?

I will double check with the recording engineer, at verify the 48K recording sample rate.

[Gale Andrews]

If the files are not private, you can post a link to one of them. We might be able to use it as an example when we work on Import Raw again.


Gale

[kozikowski]

If you call the engineer and they say it was 48000, then......full stop. We stand around looking at each other drinking tea.

You can try Effect > Change Speed or Effect > Change Pitch, but those tools add distortion. It's much more likely just changing the sampling rate will return the performances to normal with no further fuss. On the other hand, if none of the sampling rates work, then you have damaged tracks, but you already knew that.

Is this a DAT machine by any chance? Those are 48000, yes. They're video standard.

It's a standing joke that you always take a backup recorder to a DAT shoot. When you get back home, throw the DAT tape away immediately and use the backup. Chances are overwhelming good the DAT tape is trash and you can save a lot of time assuming that right at the top. If it was a Very Important Shoot, it's 100% certain the DAT tape is trash.

koz

[barhrecords]

It is a 16 track digital recorder straight to USB stick. Cymatic Audio LR-16

These tracks are from a live show of a local band. Mostly original songs. I will check about posting one here.

[kozikowski]

I will check about posting one here.

But you didn't try a different sample rate?

Koz

[kozikowski]

You will not be posting a song on the forum. We're only good for about 12 seconds of WAV music depending on the sample rate. You'll also need to post a regular song so we know what "normal" is. An open posting on DropBox or other file service would do it.

http://forum.audacityteam.org/viewtopic ... 49&t=72887

Koz

[barhrecords]

I found out it is possible for it to work.

The very first export I did to mp3 was actually correct and played back normally.

I just have to figure out the combination of raw import sample rate vs. session sample rate.