spdif clock/audio tempo

[Billyrock]

Hi nation - hope all is well. Love DP.
M dilemma: I am packing up my studio for a move and came across old DAT tape with mixes I wanted to record into DP for re-mastering and digital archiving. Put DP into spidif clock mode to record from DAT machine into DP. The tempo playback in DP and stereo mix bounced to disk is significantly slower than original tempo. Please advise.
All the best
Billyrock

OS X 10.5.6 PPC quad 2.5 GHz, 6 gig ram DP 7.21 QuickTime 7.5.5

[stephentayler]

Sounds like your DAT tapes were recorded at 48Khz and DP is playing them at 44.1Khz.... try changing the clock setting

Cheers

Stephen

[1nput0utput]

This could happen if the recording on the tapes is 48 kHz and your audio interface's sample rate is set to 44.1 kHz when you dub the tapes. When you play the dub at 44.1 kHz with the audio interface synchronized to its own internal clock, it will sound slower and lower in pitch.

[HCMarkus]

Stephen and I/O are on it. I bet if you check the file pitch, you'll find it is flat, too. The DAT standard is 48k. To repair, you can either :
1) Set DP's project sample rate to 48k and re-record; or
2) Fix the file headers on the files already recorded by changing them to 48k from the Soundbites Menu. DP has options to do this without actually re-sampling the data.

If you change the clock in DP and don't do one of the above, when you convert your files to 48k with automatic conversions, they still won't sound correct.

[Billyrock]

thank you all for the helpful insights. i suspected this might be the problem. the DAT tape has no accompanying notes to tell me what frequency it was recorded at ( my fault, of course) i will try at 48 and get back to you guys.
my best to you all.
billyrock

[Billyrock]

Hey guys - thank you for the help. indeed, the tapes is 48 kHz and the audio interface's sample rate was set to 44.1 kHz when i dubed the tapes. all is well now with my dubs.
motunation is the best.
billyrock