mp3 export has a different tempo than the project?

[newdreamstudio]

Hi folks...   I noticed yesterday that an mp3 export of a current project had a different tempo

than the project itself.   I used "what I hear" and quick bounce.   Tried it with "entire mix" and quick bounce, too... same thing.

Project tempo is 66bpm, the exports are more like 78 or 80bpm....

Thoughts?

Rusty

[Bruno de Souza Lino]

Why are you quick bouncing for an audio export?

[newdreamstudio]

good question!    I don't know!

Rusty

[DeeringAmps]

My guess is the mp3 is 44.1k and you’re playing it back at 48k. Check your interface settings. Rarely do I use real-time bounce when exporting, unless I use “audible” bounce cause I just want to hear the track. 
t

[newdreamstudio]

Makes total sense... thanks to all!

R

[Kalle Rantaaho]

On 2/24/2021 at 4:06 PM, DeeringAmps said:

My guess is the mp3 is 44.1k and you’re playing it back at 48k. Check your interface settings. Rarely do I use real-time bounce when exporting, unless I use “audible” bounce cause I just want to hear the track. 
t

One always learns more here...

I thought the sample rate/tempo(speed) issue only goes with wav-audio files, and doesn't concern mp3-data files.

[DeeringAmps]

7 hours ago, Kalle Rantaaho said:

thought the sample rate/tempo(speed) issue only goes with wav-audio files,

That's why I said

On 2/24/2021 at 6:06 AM, DeeringAmps said:

My guess is

I don't know the answer, but I'd start there if I was having the same issue...

t

I never have sample rate issues with my RME interfaces.