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Gear / Technical Help => Post-Processing, Computer / Streaming / Internet Devices & Related Activity => Topic started by: Gedit on December 19, 2005, 09:57:38 PM

Title: Transfer from DAT plays back at double speed
Post by: Gedit on December 19, 2005, 09:57:38 PM

Okay .. I'm stumped.

I transferred three SBD DATs for someone on TS over the weekend. Tascam DA-20MKII > M-Audio Pre > Dell Latitude D800 > Sound Forge.

First two DATs transferred fine. Listened in M-Audio Pre headphones a few times to make sure everything was okay. Saved the files as WAV in Sound Forge, and loaded the third DAT. Again listened to the headphones a few times, everything was fine. Saved the file as WAV, but it saved at about half the file size of the first two, even though all three DATs were two-hours plus. All three recordings are 44Hz 16-bit.

The third WAV file plays back at double speed. The first 30 seconds are normal speed, and then it goes into chipmunk mode. The rest of the recording is double speed.

Any ideas (remember that I listened to all three DATs as they played, so this is not a DAT transport error).

Title: Re: Transfer from DAT plays back at double speed
Post by: F.O.Bean on December 19, 2005, 10:13:21 PM

sounds like the sample rate is changed somehow

Title: Re: Transfer from DAT plays back at double speed
Post by: Weazel on December 19, 2005, 10:14:14 PM

are you sure there recorded  44.1/16 and not 48/16?

i had this also one time and  it had to do with bitrate setting, i changed to the recorded bitrate and it was all fine.

Title: Re: Transfer from DAT plays back at double speed
Post by: Gedit on December 19, 2005, 10:22:43 PM

^ are you sure there recorded  44.1/16 and not 48/16?

Good question. They *were* recorded at 48, but SF captured them as 44, which I thought was weird at the time but it saved me re-smapling the files. Should I re-sample the chipmunk file to 48 and then back to 44?

Title: Re: Transfer from DAT plays back at double speed
Post by: Steve J on December 19, 2005, 10:34:53 PM

First just try changing the sample rate without resampling. Go Process>Resample. Type in the bit rate and make sure the "Set the sample rate only (do not resample)" box is checked. Click 'OK'. Test the recording and see if Alvin & Co are back to normal. Otherwise, I believe you have to re-transfer.

Title: Re: Transfer from DAT plays back at double speed
Post by: Gedit on December 19, 2005, 10:40:09 PM

^ I believe you have to re-transfer

Yep ... damn !

+T for the assistance, though. Thanks.

<note to self .. don't believe SF when it says it's saving a 48Hz file as a 44 Hz file>

Title: Re: Transfer from DAT plays back at double speed
Post by: Steve J on December 19, 2005, 10:44:52 PM

Done that more times than I care to admit. Did it three times in a row once. Same night I stopped drinking vodka.  ;D

Title: Re: Transfer from DAT plays back at double speed
Post by: Gedit on December 19, 2005, 10:46:34 PM

i gave up vodka 6 years ago, but it didn't help in this case.

Title: Re: Transfer from DAT plays back at double speed
Post by: tim in jersey on December 20, 2005, 07:16:53 AM

Quote from: mannysbones on December 19, 2005, 10:44:52 PM

Done that more times than I care to admit.

qft