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Gear / Technical Help => Ask The Tapers => Topic started by: Neilyboy on August 31, 2009, 08:24:41 AM

Title: How To Fix Sample Rate? (iRiver recorded in 44100Hz but saved as 8000Hz)
Post by: Neilyboy on August 31, 2009, 08:24:41 AM

I do not know what happened but for some reason my iRiver H110 kinda goofed on me this weekend. I was recording a Backyard Tire Fire show and the dang thing recorded the first set fine. The recorder turned itself off after inactivity during the break. I then turned it back on and recorded the second set as usual.

Well I get home and look and the first set is fine totally normal but the second set shows up as a seven and a half hour file at a rate of 8000Hz. So I know all the data is there. It possibly has corrupted header information or something. The question is how to fix it?

I have tried everything in audacity. I have tried just changing the rate from 8000Hz to 44100Hz on the file itself. This works somewhat but results in skipping and such.. I have tried the trick of importing two files (one that is 44100 first - setting the project sample rate to 44100 then importing my 8000Hz file) This just produces a seven and a half hour recording at 44100Hz at a whopping 4.31GB (still playing really slow and sounds like Halloween music)..

What program should I be using or what is the best way to go about fixing this issue?

Any help is much appreciated!! Thanks so much
Neil

Title: Re: How To Fix Sample Rate (iRiver recorded in 44100Hz but saved as 8000Hz)
Post by: Neilyboy on August 31, 2009, 08:55:37 AM

hahaha I guess I just had to give up on audacity.. I went ahead and did a little searching.. found this program.

http://www.mega-nerd.com/libsndfile/

Here is the command I ran:

libsndfile>sndfile-convert.exe -override-sample-rate=44100 set02.wav set02fix.wav

Looks like its playing fine now!! Very awesome program to have around so I will keep this thread here for future reference.

Take care,
Neil

Title: Re: Solved: How To Fix Sample Rate (iRiver recorded in 44100Hz but saved as 8000
Post by: Neilyboy on August 31, 2009, 09:02:04 AM

hmm well shoot looks like there is still some skipping.. dang it.. Probably have a corrupted file i guess... good thing ctfshjohn ran a patch off me haha.. If anyone else has other ideas please let me know..

Neil

Title: Re: How To Fix Sample Rate? (iRiver recorded in 44100Hz but saved as 8000Hz)
Post by: Husker Du on August 31, 2009, 09:43:09 AM

Have you tried r8brain?

http://www.voxengo.com/product/r8brain/

Title: Re: How To Fix Sample Rate? (iRiver recorded in 44100Hz but saved as 8000Hz)
Post by: Neilyboy on August 31, 2009, 10:50:07 AM

thank you for the link man! I have not tried it but I will for sure! I will let ya know how it goes
neil

Title: Re: How To Fix Sample Rate? (iRiver recorded in 44100Hz but saved as 8000Hz)
Post by: JasonSobel on August 31, 2009, 10:55:30 AM

r8brain will resample the data to a different sample rate, which you don't want to do.  all you need to do is fix the header to tell the file that it's at 44.1 kHz, without actually resampling any of the data.
although it seems like that is what you did initially, here's another program to try out:
http://taperssection.com/index.php/topic,72936.0.html (http://taperssection.com/index.php/topic,72936.0.html)


edit to add:
here's another good thread to read about this problem.
http://taperssection.com/index.php/topic,80888.0.html (http://taperssection.com/index.php/topic,80888.0.html)

Title: Re: How To Fix Sample Rate? (iRiver recorded in 44100Hz but saved as 8000Hz)
Post by: taperj on August 31, 2009, 11:21:31 AM

A quick google brought me to this... not sure if it would help..

http://www.nick-andrew.net/projects/wav-fixer/

I'd run it on a copy if anything.

J

Title: Re: How To Fix Sample Rate? (iRiver recorded in 44100Hz but saved as 8000Hz)
Post by: Neilyboy on August 31, 2009, 01:21:04 PM

well r8brain didnt work but the wav fixer here http://taperssection.com/index.php/topic,72936.0.html is exactly what i needed. looks like the recording had other issues as well though as there are still spots where it just goes from nothing to about a half a second into the song.. not sure what caused that though. Oh well ill just get with ctfshjohn and see if I can get his patched copy. Thanks for all the help guys..

Neil